POLYMER ENGINEERING AND SCIENCE
·
2024
·
IF 3.2
Yangbo Xu,Rulin Shen,Juntao Tang,Xiangfu Zou,Wenhu Wan,Haibo Guo
Shell materials play significant impact on corrosion resistance and mechanical properties on self-healing coating of composite with core-shell nanofiber. In this paper, three promising shell materials were investigated to optimize the performance of self-healing coating. Self-healing core-shell nanofibers with different shell materials were prepared with coaxial electrospinning. The resulting nanofibers were used to prepare self-healing corrosion resistance coating. The tensile test revealed a notable enhancement in the tensile strength of PA6 core-shell nanofiber epoxy composite coatings compared with the epoxy coating, demonstrating increase of 26.92%. Friction and wear test indicated reductions in the friction coefficients of PAN, PVDF, and PA6 core-shell nanofibers by 13.82%, 12.44%, and 26.27%, respectively. The self-healing and anti-corrosion abilities were evaluated through electrochemical impedance spectroscopy (EIS) test. All three coatings exhibited exceptional self-healing efficiencies exceeding 90%, highlighting the substantial potential of the chosen shell materials as nanocontainers for self-healing agent. Results indicate that the nanofibers with PA6 as shell material can achieve the best enhancement performance, which has a greater potential for the corrosion protection and long-lasting use of offshore wind turbine tower coatings. Highlights Optimizing coating performance by screening coaxial nanofibers for shell materials Shell material can improve the tensile strength of coating up to 26.92% Friction coefficient of PA6 nanofiber coating was about 15% lower than PAN and PVDF All three coatings exhibited exceptional self-healing efficiencies exceeding 90%
研究领域:
材料科学
·
腐蚀与防护
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2025
·
IF 3.2
Jinpeng Liang,Zhigang Shen,Haijun Xiao,Yanan Qin,Nan Sun,Danli Nie,Yuxiang Xie,Liping Yang,Baoqing Shentu,Xinming Pu
Poly(ethylene furanoate) (PEF), a sustainable alternative to poly(ethylene terephthalate) (PET), exhibits superior gas barrier properties but faces challenges in impact toughness and slow crystallization, limiting its industrial adoption. This study introduces a novel terminal modification strategy using polycyclic aromatic hydrocarbons (PAHs) to synergistically enhance PEF's performance through π–π stacking interactions, plasticization, and crystallization optimization. By incorporating PAHs (9-PBA/1-NA) as terminal modifiers, modified PEFB x and PEFN x polyesters demonstrate accelerated crystallization (15 vs. 33 min for neat PEF) and increased crystallinity (53% vs. 41%). The PAH-driven π–π stacking and V-shaped B(OH) 2 groups in 9-PBA promote chain folding and ordered packing, significantly improving oxygen barrier performance (40.9% reduction in permeability coefficient) and mechanical properties. Remarkably, PEFB 0.5 achieves a 277% increase in elongation at break and a 229% enhancement in tensile modulus compared to unmodified PEF. Furthermore, the method integrates reactive extrusion with injection molding, offering a scalable and industrially viable route for producing high-performance PEF with balanced processability, barrier properties, and mechanical strength.
研究领域:
高分子科学
·
材料工程
·
化学工程
·
可持续化学
·
塑料加工
✓ 已验证
产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2025
·
IF 3.2
Xiaohuan Li,Donghan Li,Jiawei Liu,Honghua Wang
Thermoplastic toughening agents represent a prevalent category of epoxy resin modifiers. In practical applications, these agents can significantly enhance the mechanical properties of epoxy resins. However, due to the inherent phase separation characteristic of epoxy resins, the toughening effect is somewhat constrained. Recently, branched polymers have gained recognition for their effectiveness in toughening epoxy resins. Their low viscosity and abundant reactive groups facilitate superior toughening outcomes. This study leverages both the structural attributes of branched polymers and high-performance polyethersulfone ketone (PESK). Through nucleophilic polycondensation reactions involving bisphenol monomers such as dihydroxydiphenylsulfone (BDS), difluorophenyl ketone (DFDBK), and trifunctional monomer 1,1,1-tri(4-hydroxyphenyl)ethane (THPE), we synthesized a series of long-chain polyaryletherketones (LCBPESK) with varying degrees of branching. The fundamental properties of these materials were characterized, and they were employed for toughening modification within the epoxy resin/methyltetrahydrophthalic anhydride (E51/MTHPA) system. Characterization tests revealed that long-chain branched polyethersulfone ketones possessing both branched structures and reactive end groups effectively mitigate phase separation between the toughening agent and the epoxy resin while significantly enhancing its toughness. Notably, when LCBPESK-30 is incorporated at a loading level of 15 phr, there is a remarkable increase in impact strength by 133% in the epoxy system. In addition, we investigated the toughening mechanism of LCBPESK in E51. For polyaryl ether resins, a certain degree of branching and the presence of active end groups significantly influence their toughening effect in epoxy resins, which holds considerable industrial value and promising application prospects.
研究领域:
材料科学
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高分子化学
·
复合材料
✓ 已验证
产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2025
·
IF 3.2
Huishan Chen,Xiaoyi Sun,Ning Qing,Liuyan Tang
Hydrophobically modified ethoxylated urethane (HEUR), a typical polymer associative thickener, is extensively applied in aqueous coatings, textile printing, and resin coatings to regulate the rheological properties of the system. However, conventional branched HEURs face two critical limitations: (1) the risk of excessive cross-linking during the chain-expansion stage due to high monomer reactivity; (2) the phase-separation phenomenon in some branched HEUR aqueous solutions upon standing. To overcome these challenges, we designed and synthesized a polyhydroxy hyperbranched structure (PU-OH 3-6 ). This structure features two main advantages: a larger central backbone and a greater spacing between active groups (OH). The hyperbranched HEUR 3-6 synthesized using PU-OH 3-6 as a branched-type chain extender is more controllable and viable in the production process. Moreover, various testing methods were employed to assess the thickening performance, salt resistance, and water retention of HEUR in a pure-water system. The results indicated that the branched structures of HEUR 3-6 have better thickening properties compared with the previously reported HEUR with a linear structure (HEUR L ), and branched HEUR with using gamma-triol (HEUR GI ), pentaerythritol (HEUR P ), and xylitol (HEUR X ) to expand the chain. Among them, HEUR 5 demonstrated the best thickening effect in pure-water systems, while in salt-containing solutions, HEUR 6 with a six-branched degree showed more pronounced anti-electrolyte properties.
研究领域:
高分子科学
·
材料工程
·
化学合成
·
流变学
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涂料技术
✓ 已验证
产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2024
·
IF 3.2
Yanbo Li,Jinsuo Yu,Deyu Wei,Chengkai Liu,Yan Zhao,Junjia Bian,Shulin Sun,Hongwei Pan,Huili Yang,Lijing Han,Huiliang Zhang
Biodegradable materials provide protective properties comparable to conventional plastics while diminishing reliance on nonrenewable resources. Environmentally friendly polymer blends were prepared by melting poly(R)-3-hydroxybutyrate-co-(R)-3-hydroxyhexanoate) (PHBHHx) with poly (butylene succinate) (PBS). PBS was synthesized through esterification and polycondensation using 1,4-butanediol and succinic acid, with tetrabutyltitanate as the catalyst. The PHBHHx is supplied by Bulepha®PHA Company of China, model number BP330. The effects of PHBHHx content on thermal behavior, compatibility, and thermal stability of PBS/PHBHHx blends were systematically investigated. Differential scanning calorimetry (DSC) results indicated that the addition of PHBHHx influenced the crystallization behavior, the crystallization temperature ( T c ) of PBS decreased meanwhile, the crystallization half-time of PBS is reduced to 1.5 min compared with neat PBS (5 min) after isothermal is crystallized at 95°C. Polarized Optical Microscopy (POM) images also revealed that crystallization rate accelerated in the blend with increasing PHBHHx content. Rheological and Scanning Electron Microscopy (SEM) analysis demonstrated that incorporating a significant content of PHBHHx reduced compatibility between PBS and PHBHHx. Mechanical property testing indicates that the addition of PHBHHx reduced the toughness of blends. Additionally, the addition of a small amount of PHBHHx imparts a higher crystallinity (56%) and heat resistance of the PBS/PHBHHx blends (78°C) was higher than neat PBS (74°C). Highlights Laboratory synthesis of high molecular weight PBS. Optimal ratios improved crystallinity and thermal stability of blends. A systematic study of the crystallization properties of blends.
研究领域:
材料科学
·
高分子科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2025
·
IF 3.2
Min Xu,Jinrong Yin,Zhenyong Li,Yangqi Jiang,Opoku Bismark,Xiaoji Fu,Yu Song,Xianyan Ren,Yuwang Zhong
To solve the problem that the self-generated proppant in fractures grows slowly and cannot support the fractures in time, nano-graphite (NG) was introduced into a phase change liquid (PCL) composed of “styrene-divinylbenzene (SDB)” and the resulting self-generated proppants were constructed with a high growth speed. The NG/PCL started the phase transition from liquid to solid after 8 min at about 55°C in the wellbore section, and the phase transition was completed for only 2.5 min at a constant temperature of 65°C in fracture. Moreover, due to the high thermal conductivity and heterogeneous nucleation of the NG powder, the maximum strength of self-generated proppant in the NG-containing system can reach about 56.2 N during its growth process, which is 34.4% higher than that of pure SDB. The yield of the well-dispersed spherical self-generated proppants NG/SDB under the completely static condition can reach about 80%, of which the proppants with a particle size of 0.4 ~ 0.7 mm account for about 80%. NG/SDB exhibited an ultra-low apparent density of approximately 1.004 g/cm 3 , high compressive strength, and a crushing ratio of less than 1% at a closure pressure of 52 MPa, which is lower than that of commercial quartz sand and ceramsite proppants. Highlights Self-generated proppants with rapid growth were developed by the introduction of NG. Positive effects of NG in PCL system are obvious on phase transition and growth. NG/SDB is qualified in phase transition timing and compressive strength. The single-microsphere yield of NG/SDB is about 80%. The crushing ratio of NG/SDB as low as 3.92% at a closure pressure of 69 MPa.
研究领域:
材料科学
·
石油工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2024
·
IF 3.2
Bo Liu,Zhigang Yuan,Mehdi Derradji,Caizhao Liu,Mingming Sun,Xugang Zhang,Gang Xue,Caiyu Song,Bin Zhang
Bismaleimide (BMI) resins is widely used in the aerospace field because of its excellent properties, but its poor toughness limits the possibility of its application in a wider range of fields. Therefore, a novel bio-compound, 4-(allyloxy)-3-methoxy-N-(3-(triethoxysilyl)propyl)benzamide (AMTPM), was designed and synthesized from renewable vanillin, which has Schiff-base structure, silico-oxygen bond structure, and allyl structure. The chemical structure of AMTPM has been characterized and validated by Fourier transform infrared (FTIR) and hydrogen nuclear magnetic resonance ( 1 H NMR). It was found that the addition of AMTPM can effectively promote the curing behavior of BD resins (BMI and diallyl bisphenol A (DBA) was mixed and cured at the ratio of 1:0.87, named BD resins). AMTPM can affect the thermal stability and improve the mechanical properties of BD-AMTPM resins (BD resins modified by AMTPM in different addition), and the detailed discussion was conducted. With the increase of AMTPM content, the thermal stability of BD-AMTPM resins was deteriorated while the residual weight percentage at 800°C ( Y c ) was increased. When the content of AMTPM reached 12 wt%, the results showed that Y c achieved the values at a magnitude of 37.57%. Meanwhile, the glass transition temperature ( T g ) achieved 320°C. Among the BD-AMTPM resins system, the BD-6 wt% AMTPM has the best toughness and mechanical properties. The impact strength was increased by 29.2%, the tensile strength was increased by 22.1% and the elongation at break was increased by 44%. The fracture morphology of BD-AMTPM resins was also studied by scanning electron microscopy (SEM) to support the mechanical experimental conclusions. This study provides a more environmentally friendly and convenient modifier, which is of great significance for expanding the application of bismaleimide resin. Highlights A bio-based modifying agent (AMTPM) was designed and successfully synthesized. AMTPM has both Si-O and Schiff-base structures. AMTPM can effectively improve the toughness of BD-AMTPM resins through impact and tensile tests.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2024
·
IF 3.2
Zhibo Zhao,Rajkamal Balu,Namita Roy Choudhury,Naba Kumar Dutta
Herein, we investigate the effect of the addition of tetra-needle-like zinc oxide whisker (T-ZnOw), a novel reinforcing additive, on the melt crystallization behavior of biodegradable polybutylene adipate terephthalate (PBAT)/polylactic acid (PLA) polymer blends. PBAT and PLA were blended in a Haake mixer at a fixed weight ratio of 70/30, and the contents of T-ZnOw varied from 0 to 7 wt%. The melt thermal properties and crystallization behavior of PBAT/PLA blends and PBAT/PLA/T-ZnOw composites were studied using differential scanning calorimetry. The kinetics of melt crystallization have been quantitatively explained using a range of mathematical formalisms. The Avrami equation is adopted to analyze the isothermal crystallization process and kinetics of PBAT/PLA/T-ZnOw composites. For its nonisothermal crystallization process and kinetics, the Ozawa equation cannot describe the entire process, while the Jeziomy-modified Avrami equation can only describe the initial stage of its nonisothermal crystallization. Using Mo-analysis, the impact of T-ZnOw contents on the composite's nonisothermal crystallization kinetic has been thoroughly examined. Given that the PBAT/PLA blend system's crystal formation may be inhibited by T-ZnOw, the observation demonstrates that T-ZnOw only marginally alters this process. The work is of significant scientific value and adds a new concept to the development of sustainable thin film for packaging. Highlights T-ZnOw is used as a novel additive for PBAT/PLA polymer blends. The crystallization of PBAT/PLA/T-ZnOw composite systems is thoroughly examined. T-ZnOw marginally reduces the kinetics of the crystallization process of PBAT/PLA blends. PBAT/PLA/T-ZnOw composites follow volume nucleation with mixed 2D/1D growth. The nonisothermal crystallization of PBAT/PLA/T-ZnOw composites is validated by Mo-analysis.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2024
·
IF 3.2
Long-De Wang,Ling Tong,Jian-Wei Wu,Jie-Wei Rong
Urethane imide anhydride oligomers with terminal groups as anhydride groups were designed and synthesized using second-order nonlinear optical chromophore molecule, bisphenol AF-type diethylidene dianhydride, and toluene diisocyanate as monomers. Polyurethaneimide (PUI) second-order nonlinear optical polymers with the structure of imide and amino ester chain segments were then synthesized by the polycondensation reaction between urethane imide anhydride oligomers and aromatic diamine monomers. The glass transition temperature ( T g ) of PUI reached 186°C, and the 5% heat-loss decomposition temperature was 320°C. The corona-polarized PUI had an electro-optic (EO) coefficient (γ 33 ) of 82 pm/V tested by the reflection method. The loss of light transmission of the polymer waveguide prepared with PUI as electro-optical material was 1.13 dB/cm at 1550 nm. Mach–Zehnder type polymer waveguide electro-optical modulators have been prepared based on the properties of the electro-optic material PUI. The fabricated polymer EO modulators had favorable electro-optic modulation response performance for low-frequency electrical signals. The good modulation characteristics of the manufactured electro-optical modulators proved that the synthesized PUI was a waveguide polymer material with good comprehensive performance. Highlights Electro-optic fluorinated polyurethaneimide was synthesized. Polyurethaneimide as core material, polymer waveguide EO modulators were fabricated. The prepared modulators had good electro-optic modulation performance.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2024
·
IF 3.2
Cuilian Yi,Chunyan Xu,Xiaoyan Zhao,Chenyi Wang,Hengxue Xiang
Tea polyphenol (TP) is used as a food additive to inhibit lipid peroxidation reactions and extend shelf life, but excessive intake can affect the human immune system. Therefore, developing effective TP detection is significant. Here, pyrene-based polyimide (Py-PI) was synthesized by one-step condensation copolymerization. This polyimide possessed excellent solubility and photoluminescence due to the introduction of pyrene-conjugated groups. It could be used as fluorescent probe for TP detection in solution. In addition, Py-PI fluorescent test paper with different morphology were prepared by electrospinning. As the concentration of the spinning solution was 15 wt%, the bead-like porous polymer electrospun membrane displayed excellent surface wettability which could make the water droplet completely penetrate into the sample within 6 min. The fluorescence enhancement phenomenon could be observed for 5 × 10 −6 mg/mL TP solution on Py-PI test paper. Furthermore, interference investigation of pH on test paper indicated that the sample exhibited a relatively stable fluorescence “turn-on” response in acidic conditions. This work provides a convenient and rapid detection of TP antioxidant in the future.
研究领域:
材料科学
·
食品科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2024
·Vol. 64
·期 7
·3137-3146
·
IF 3.2
Menghua Ma,Qixiang Yang,Tiantian Meng,Yuxin Wei,Yi Pan,Rui Chen
A new fire retardency APD was synthesized successfully by the condensation between 2-aminopyrazine and DOPO, and target product APD was characterized by NMR. Absorption peak at 12.6 ppm in 31 P NMR verified complete consumption of the reactant DOPO and further confirmed the structure of APD. The safety of epoxy resin (EP) in fire disaster was dramatically improved by introduction of APD. Epoxy resin modified with 8% APD succeeded in vertical burning (UL-94) test with V-0 rating and limited oxygen index (LOI) of EP/8% APD was also improved to 33.9%. Cone calorimeter (CC) test further exhibited fire resistant effect of APD on EP in detail. 11.0 g APD reduced total heat release of 100 g EP to 35.1% and reduced total smoke product of 100 g EP to 19.9%. Char residue from CC test of EP/8% APD was analyzed by Raman, XPS, SEM, and FTIR tests. The results of these tests indicated that compact morphology of char residue from EP/8% APD possessed a positive effect in blocking fire spread. Highlights APD was synthesized and fire resistant EP was made. EP/APD acquired outstanding fire resistance and moderate mechanical properties. APD played fire resistant role in gas phase and condensed phase.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2024
·Vol. 64
·期 10
·4993-5005
·
IF 3.2
Feng Zhou,Yu Song,Yu Li,Xianyan Ren
In this paper, an acrylate copolymer-based oil adsorption resin was designed and synthesized by a suspension polymerization with octadecyl acrylate (SA) and butyl acrylate (BA) as monomers, divinylbenzene (DVB) as a cross-linking agent, and toluene as a pore-forming agent. By studying the synthesis conditions, the copolymer “SA-BA-DVB” (PSBA) with the best adsorption capacity was obtained, when the molar ratio between SA and BA was about 0.9, the content of the DVB and PVA 1788 was about 0.107 wt% and 1.0 wt%, respectively, accounting for the total mass amount of the monomers. Furthermore, by introducing 2% reactive silica nanoparticles (R-SiO 2 ), the performances of the PSBA were improved due to its increased hydrophobicity and activity space. The equilibrium adsorption capacity of the resulted R-SiO 2 /PSBA to kerosene, diesel oil, benzene, and p-xylene was 31.90, 34.13, 39.44, and 41.81 mL/g, respectively, which is about 1.12 to 1.21 times higher than that of the PSBA. Also, the R-SiO 2 /PSBA show brilliant oil retention rate of about 99% after centrifugation at 3000 rpm for 5 min and recycling ability which can be reusable for at least 10 absorption-desorption cycles without capacity change, demonstrating that the obtained R-SiO 2 /PSBA resin can be used as oil removing agents in the field of oil spill applications. Highlights R-SiO 2 modified acrylate copolymer as an oil adsorption resin was designed and synthesized. The influence of the monomers, cross-linking agent, and others on the adsorption resin was systematically studied. The adsorption kinetics and performances of the adsorption resin were studied.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）