POLYMER ENGINEERING AND SCIENCE
·
2026
·
IF 3.2
Ya-qin Liu,Yu Fang,Peng Zhang
In this work, the reinforcing and toughening silicon hybrid polyurethanes (SPUs-diol) were achieved by strategically incorporating rigid silicon groups and flexible diol molecules into the polyurethane skeleton. As a result, introducing the types or proportions of diols in PU segments effectively regulated the segment characteristics and hydrogen bonds, resulting in unusual microstructural evolution. Furthermore, a synergistic enhancement in mechanical properties was found, where the maximum tensile strength and elongation at break reached 20.28 ± 1.99 MPa and 225.15% ± 35.57%, respectively, several times greater than those of SPUs with low contents or short chains of diols. Simultaneously, SPUs-diol showed different thermo-optic responses due to the dissociation and recombination of hydrogen bonding. In particular, the higher contents or longer chains of the diols were, the more significant thermo-optic response SPUs-diol showed. In sum, this study was a new view for the innovation and development of PU-based materials. Highlights Silicon-hybrid polyurethanes with enhanced mechanics were constructed. SPUs-diol provided high reinforcing and toughening properties. SPUs-diol showed the unusual evolution of microphase separation. Thermo-stimuli responsive effect was adjustable effectively.
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产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2026
·
IF 3.2
Jinhe Gao,Shuangle Xue,Caizhao Liu,Mehdi Derradji,Mianyuan Wu,Yize Wu,Zhigang Yuan,Mingming Sun,Xugang Zhang,Jianhui Li,Bin Zhang
This study reports the synthesis of a eugenol-derived benzoxazine resin (AEM) from 3-ethynylaniline and bio-based eugenol, and its structural characterization using Fourier transform infrared spectroscopy (FTIR) and proton nuclear magnetic resonance ( 1 HNMR). Subsequently, the AEM resin was copolymerized with bisphenol-type epoxy resin (E51) in varying proportions to form an EP-AEM modified resin system, whose processability, dynamic thermomechanical properties, thermal stability, dielectric properties, mechanical properties, and adhesion performance were investigated. The flexural strength, tensile strength, and elongation at break of EP-2AEM resins were 7.6%, 53.7%, and 41.2% higher than EP resins, respectively. In particular, AEM markedly increases the residual carbon yield ( Y c ) after high-temperature combustion in a nitrogen atmosphere, and this improvement becomes more pronounced as the AEM concentration increases. Compared with neat EP resin (14.92%), EP-4AEM resin exhibits a significantly higher value (21.59%). The high-temperature adhesion strength of EP-2AEM increases by 51.5%. Moreover, EP-4AEM shows the lowest dielectric constant (2.49) and dielectric loss tangent (0.022). Highlights AEM improves the comprehensive performance of epoxy resin.
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产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2026
·
IF 3.2
Haohao Hou,Linqi Lu,Hui Ma,Hongfu Zhou,Xiangdong Wang,Munan Qiu,Xiaoling Zang
The rapid development of 5th generation communication and wearable electronic devices has increased the demand for lightweight and flexible materials with excellent electromagnetic interference (EMI) shielding performance and piezoresistive sensing characteristics. Herein, cold/hot pressing was combined with supercritical CO 2 foaming to prepare segregated carbon nanotube (CNT)/ethylene-vinyl acetate copolymer (EVA)/low-density polyethylene (LDPE) sheets and related foams, exhibiting superior sensitivity and EMI shielding effectiveness (SE). Benefiting from the segregated distribution of CNT, CNT/EVA/LDPE sheets exhibited excellent conductivity of 0.38 S cm −1 . The composite foam with 6 phr CNT achieved a maximum absolute EMI SE of 113 dB (g/cm 2 ) −1 in the X-band (8.2–12.4 GHz) while maintaining high sensitivity (GF = 4.4), perfectly balancing piezoresistive sensing and EMI shielding performance. Apart from pure EVA/LDPE, the mechanism for EMI shielding in CNT/EVA/LDPE sheets was primarily based on reflection, while that of segregated CNT/EVA/LDPE foam was chiefly ascribed to absorption. Moreover, the segregated CNT/EVA/LDPE foam could accurately detect human motion, further demonstrating their practical application potential. This study provides new insights into the development of lightweight, multifunctional materials for EMI shielding and advances next-generation functional materials for flexible electronics and wearable devices. Highlights A composite that integrates mechanical, conductive, EMI shielding and sensing. S/C6-F shows excellent conductivity (0.01 S cm −1 ) and SSE/t (113 dB cm 2 g −1 ). Its porous structure shifts EMI shielding from reflection to absorption. A high gauge factor of 4.4 enables S/C6-F to accurately detect human motion. S/C6-F achieves 7 MPa stress at 60% strain, indicating mechanical stability.
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产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2015
·Vol. 55
·期 10
·2313-2321
·
IF 1.52
Tao Liu,Yongpeng Wang,Yu Su,Hongyang Yu,Nan Zhao,Yanhua Yang,Zhenhua Jiang
A series of poly(aryl ether ketone) polymers (m-PAEK-CN) containing phthalonitrile were synthesized by a direct solution polycondensation and characterized by Fourier-transform infrared spectroscopy and hydrogen nuclear magnetic resonance. Thermal crosslinking of m-PAEK-CN, catalyzed by p -BAPS, was then performed via heating their films up to 350 o C. Dynamic rheology results showed that the rate of diamine-catalyzed crosslink reaction could be easily controlled by varying the content of cyano groups in the polymer. The uncured synthesized polymers had good solubility, whereas the cured ones became insoluble in common organic solvents. Spectra measurement demonstrated the trimerization reaction of terminal cyano groups to form triazine rings. The resulting cured samples had higher glass transition temperatures, better thermal, and thermo-oxidative stability with high char yield than the uncured ones. Gel content measurements demonstrated that the cured polymers had high crosslinking density with significantly high gel content over 96.0%. Thermal mechanical analysis indicated that the cured phthalonitrile resins possessed excellent thermal mechanical properties and dimensional stability at increased temperatures. The tensile modulus and strength of the cured m-PAEK-CN increased up to 2101–2104 MPa and 96–100 MPa, respectively, which were about 21–23% and 32–56% higher than the uncured ones’. This kind of phthalonitrile resins may be used as a candidate for high-performance polymeric film materials. POLYM. ENG. SCI., 55:2313–2321, 2015. © 2015 Society of Plastics Engineers
研究领域:
高分子科学
·
材料工程
·
聚合物热性能
·
高性能聚合物
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DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2013
·Vol. 54
·期 7
·1704-1711
·
IF 1.243
Dayong Gui,Xue Gao,Jingfeng Hao,Jianhong Liu
Liquid crystalline polyurethane-imide (PUI) was synthesized from polyethyleneglycol, toluene diisocyarate, and pyromellitic dianhydride by solution polymerization and characterized by FTIR spectrum. The liquid crystal properties of PUI were verified by differential scanning calorimetry, polarizing microscope (POM), and X-ray diffraction. PUI is a longitudinal liquid crystal with LC sequences in the backbone along the main-chain direction. PUI was used to blend with epoxy resin(ER) as a modifier. The mechanical properties, thermal property, and morphology of PUI/ER composites were investigated. It was found that PUI was a kind of thermotropic liquid crystal material within a wide range of temperature. Remarkable improvement in strength and toughness of ER/PUI composites was achieved by the blending of PUI with epoxy in appropriate proportions. The maximum for bending strain and bending strength of the composite reached the level of 10.65% and 178 MPa, respectively when the mass fraction of PUI was 15 wt%. The mechanical behaviors of the PUI/ER were consistent with morphology analysis of the fracture surfaces of PUI/ER composites from SEM. POLYM. ENG. SCI., 54:1704–1711, 2014. © 2013 Society of Plastics Engineers
研究领域:
高分子科学
·
材料工程
·
复合材料
·
热固性聚合物
·
聚合物改性
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DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2014
·Vol. 55
·期 3
·614-623
·
IF 1.441
Hao Li,Xian-Ming Zhang,Shi-Yang Zhu,Wen-Xing Chen,Lian-Fang Feng
Isocyanate- and amine-functionalized polypropylene (PP) and polystyrene (PS) were prepared through grafting and copolymerization method. These compounds are used as precursors for PP-graft-PS (PP-g-PS) copolymers and reacted at the matrix interface of PP/PS blends. Functionalized polymer structures were characterized by 1 H NMR and FTIR spectroscopy. The effects of the synthesized compatibilizer on the rheological and morphological behavior of PP/PS blends were investigated systematically. Results showed that the functional polymer was successfully synthesized, and the additional two different compatibilizer systems dramatically decreased the size of the dispersed phase domains in PP/PS blends. Compared with the uncompatibilized blends, compatibilized blends exhibited a slightly higher crystallization temperature because the melting points of the blend components were not evidently affected by the addition of compatibilizer, as revealed by differential scanning calorimetry. The compatibilizer effect on the PP/PS blends was reflected through rheological property and dynamic mechanical analysis. POLYM. ENG. SCI., 55:614–623, 2015. © 2014 Society of Plastics Engineers
研究领域:
高分子科学
·
材料工程
·
聚合物共混与复合材料
·
聚合物改性
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DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2018
·
IF 1.551
Jianhua Zhou,Yanjiao Cui,Hongtao Yao,Jianzhong Ma,Huijun Ren
The nanocapsules containing n -butyl stearate (BS) and n -octadecane (C18) as binary phase change material and polyacrylate as shell were synthesized via miniemulsion polymerization using reactive emulsifier. The phase transition (change) temperatures and phase change enthalpies of the phase change material can be adjusted by regulating the composition of BS and C18. Moreover, the influences of emulsification method and reactive emulsifier dosage were studied. SEM and TEM analysis showed the nanocapsules were a spherical shape with core-shell structure and the average size was about 170 nm. DSC and FT-IR analysis indicated the binary phase change material was encapsulated with polyacrylate shell, and the fusing and crystallizing temperatures and latent heats of nanocapsules were determined as 26.07 °C and 24.85 °C, 56.89 J g −1 and 54.02 J g −1 respectively, and the encapsulation efficiency was above 55.09%. In addition, the results of thermoregulating and durability property revealed that the finished cotton fabric had temperature-regulated and durability properties. POLYM. ENG. SCI., 59:E42–E51, 2019. © 2018 Society of Plastics Engineers
研究领域:
高分子科学
·
材料工程
·
热能储存
·
纺织品整理
·
纳米材料
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DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2017
·Vol. 58
·期 1
·103-111
·
IF 1.449
Bing Zhou,Zhubo Liu,Bin Xu,A.V. Rogachev,M.A. Yarmolenko,A.A. Rogachev
Polytetrafluoroethylene (PTFE) composite coatings doped with copper acetate and polyethylene (PE) were fabricated on rubber substrate by electron beam dispersion technique. The effects of dopant nature and glow discharge treatment on morphology, structural and tribological properties of the coatings were investigated. The results showed that Cu and PE doping change the surface structure of PTFE-based composite coatings due to the chemical reactions between the dispersion products. Cu-PE-PTFE coatings show the columnar and layered growth models without and with discharge treatment. Cu adding decreases the crystallinity, branched degree and unsaturated degree of PE coatings, but increases the branched degree and unsaturated bonds in the PE-PTFE coatings. Glow discharge enhances the crystallinity and ordering degree of composite coatings. Friction experiments indicated the significant difference of composite coatings in the nature of their destruction during friction. PE-PTFE coating is characterized of the brittle fracture with clear failure boundaries but Cu-PE-PTFE coating shows a rough surface without cracking and delaminating after friction. Cu doping increases the dynamic coefficient of friction of PE and PE-PTFE composite coatings, but discharge plasma decreases the dynamic coefficient of friction. Cu-PE-PTFE composite coating after discharge treatment has the decreased dynamic coefficient of friction and improved wear resistance. POLYM. ENG. SCI., 58:103–111, 2018. © 2017 Society of Plastics Engineers
研究领域:
材料科学
·
聚合物工程
·
表面改性
·
摩擦学
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DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2016
·Vol. 56
·期 10
·1118-1124
·
IF 1.719
Weijian Xiong,Xue Gao,Dayong Gui,Xueqing Cai,Guiming Tan,Jianhong Liu
A liquid crystalline molecule, 4'-allyloxy-biphenyl-4-ol (AOBPO), was used to functionalize carbon nanotubers (CNTs) via physical means and chemical means, respectively. The physically functionalized CNTs (AOBPO-CNTs) and chemically functionalized CNTs (AOBPO-O-CNTs) were characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), fluorescent spectroscopy, and Raman spectroscopy. The two functionalized CNTs were mixed with silicone resin as fillers to fabricate organosilicone nanocomposites. Scanning electron microscopy (SEM) images indicated that the dispersion of CNTs in silicone resin and compatibility of CNTs with silicone resin were improved effectively after functionalization with liquid crystal via physical or chemical means. The thermal and mechanical properties testing indicated that, the chemically functionalized CNTs got a better effect in improvement of mechanical properties of silicon resin than the physically functionalized CNTs, whereas the physically functionalized CNTs was more applicable to enhance the thermal conductivity of silicon resin. The tensile strength of AOBPO-O-CNTs/silicon resin increased by 37.8% over that of neat CNTs/silicon resin when the mass fraction of AOBPO-O-CNTs was 1.0%, and the elastic modulus of AOBPO-O-CNTs/silicon resin increased by 32.8% over that of CNTs/silicon resin if it came up to 2.0%. The thermal conductivity of the resin filled with AOBPO-CNTs was improved to be 1.176 W (m −1 K −1 ) at the mass fraction of 5.0%, which was enhanced more than 73.2% over that of CNTs/silicon resin. POLYM. ENG. SCI., 56:1118–1124, 2016. © 2016 Society of Plastics Engineers
研究领域:
材料科学
·
聚合物复合材料
·
纳米技术
·
热学性能
·
机械工程
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DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2014
·Vol. 55
·期 5
·1039-1045
·
IF 1.441
Huimin Qi,Hongdong Duan,Xingjian Wang,Xia Meng,Xiaocong Yin,Lina Ma
In this work, a series of porous terpolymers with degrees of crosslinking at 30–65% were synthesized by suspension polymerization. Fe 3 O 4 nanoparticles were used to modify the porous terpolymer with degree of crosslinking at 30%. The resulting terpolymers with mean pore size of 10–30 nm were used as supports for immobilization of cellulases through covalent bondings. The Fourier transform infrared spectroscopy and thermal gravity analysis measurements demonstrated that cellulases were immobilized onto the porous terpolymers. The effects of pH and temperature on enzyme activity were investigated in acetate buffer medium by hydrolysis of sodium carboxymethyl celluloses. The reusability of immobilized cellulases was also investigated. The result showed that immobilized cellulases exhibited higher residual activities and enzyme activities than free cellulases in wide ranges of pH and temperature. We also found that the reusability of cellulases immobilized on terpolymers with magnetism was better than that of cellulases immobilized on terpolymers without magnetism. POLYM. ENG. SCI., 55:1039–1045, 2015. © 2014 Society of Plastics Engineers
研究领域:
高分子科学
·
酶工程
·
纳米材料
·
生物催化
·
应用化学
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DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2024
·Vol. 64
·期 5
·2082-2095
·
IF 3.2
Yilei Wang,Can Weng,Zihao Fei,Huijie Sun,Bingyan Jiang
The demolding process in micro-injection molding constitutes a critical phase, exerting a decisive influence on the quality of polymer microstructures. In this study, the demolding forces of PMMA microfluidic chips were measured under different demolding temperatures, packing pressures, and demolding speeds by using pure nickel (Ni) mold insert. The dimensional deviations of the microchannels with different aspect ratios were analyzed. In addition, the effect of mold insert modification on the demolding force was further analyzed. The results showed that the effect of demolding temperature on the demolding force was the most significant, and the peak demolding force decreased with the decrease in temperature. The width of the microchannels increased and the depth decreased after demolding, while the opposite results were observed for the micro-mixing structures. However, the dimensional deviation of the micro-mixing structures was larger than that of the microchannels. Using the optimal molding parameters, the peak demolding force could be reduced from 114.0 N at 110°C to 47.0 N, a decrease of 58.8%. It is noteworthy that, when the microchannel was narrower than 100 μm, achieving precise replication of microchannel dimensions became progressively more challenging as the microchannel width decreased. Using the Ni-WS 2 mold insert with low surface energy and low friction coefficient, the demolding force could be further reduced by 38.3%. The effect of the molding quality of microfluidic chip microstructures on the mixing performance of heavy metals was demonstrated by micro-mixing experiments. Highlights Demolding temperature crucially affects microstructure dimensions. Optimal parameters and modified mold insert reduce demolding force by 38.3%. Dimensional deviation increases with the increase of microchannel aspect ratio. Optimized microfluidic chip enhances Co 2+ chemiluminescence by 6.42%.
研究领域:
微流控技术
·
聚合物加工
·
精密制造
·
材料科学
·
表面工程
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DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2017
·Vol. 57
·期 10
·1127-1135
·
IF 1.449
Liangliang Liu,Xiaolong Han,Wenling Hu,Binxia Zhao,An Fan
Polydimethylsiloxane (PDMS), as one of the typical membrane, has been widely applied in gasoline desulfurization via pervaporation. In this work, the PDMS/PVDF composite membranes were prepared by curing PDMS with three different crosslinking agents. They were 3-Aminopropyltrimethoxylsilane (APTMS), 3-Glycidyloxypropyltrimethoxylsilane (GPTMS), and 3-Mercaptopropyltrimethoxylsilane (MPTMS), respectively. These PDMS/PVDF composite membranes were characterized by Fourier transform infrared (FT-IR), X-ray photoelectron spectroscopy (XPS), Scanning electron microscopy (SEM), and then evaluated by static tensile test, swelling degree test and surface detach experiment. The results showed that A-PDMS membrane had highest crosslinking density, best anti-swelling ability and excellent combination between the separation layer and support layer. Moreover, the effect of operation temperature and the feed sulfur content on separation performance were investigated systematically. Experimental results indicated that PDMS membrane crosslinked with APTMS presented the highest enrichment factor with 3.46°C at 45°C, and PDMS membrane crosslinked with MPTMS presented the highest permeation flux with 21.19 kg/(m 2 ·h) at 45°C. Finally, long-term stability test showed that these PDMS membranes all have desirable stability. POLYM. ENG. SCI., 57:1127–1135, 2017. © 2017 Society of Plastics Engineers
研究领域:
高分子科学
·
膜技术
·
化学工程
·
分离过程
·
材料科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）