JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 47
·e56255
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IF 2.7
Jin Yang,Yixuan Hou,Yingzheng Hong,Yingbang Yao
Since thermally conductive fillers easily aggregate when introduced into polymer matrix, it is essential to apply a modifier to enhance the dispersion of the filler. In current study, the surface of boron nitride (h-BN) is firstly modified by employing a double modification process and then added into sulfonated polyetheretherketone (SPEEK) to form the composite materials. Four different kinds of samples of double-modified h-BN were obtained. Ultimately, the XXX@h-BN/SPEEK (XXX denoted as modifier, i.e. PDA, VTMS, TEOS, and APS) flexible film with the horizontally oriented XXX@h-BN was produced by heating the mixture under an external electric field. The test results indicate that the thermally conductive filler PDA@h-BN (PDA: polydopamine), which was prepared by modifying OH@h-BN with PDA, loaded into SPEEK, and electrically oriented, shows the best overall performances. With a high tensile strength of 43.24 MPa and good flexibility, PDA@h-BN/SPEEK flexible film exhibits an in-plane thermal conductivity of 2.3 Wm −1 K −1 at a filling ratio of 10 wt%. The sample may be bent at a steep angle without breaking down and can recover to original shape bearing its high degree of flexibility.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 39
·e55999
·
IF 2.7
Lihui Yao,Yuzhu Li,Ya Li,Yajuan Wang,Linghui Wang,Dan Qiu,Yunxuan Weng
Benzophenone (BP) and N-vinylpyrrolidone (NVP) were used to modify the surface of polylactide (PLA) films by UV grafting method. The effects of light distance, temperature, reaction time, and modifier concentration on the structure and properties of PLA films were investigated by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy (XPS), nuclear magnetic resonance spectroscopy, differential scanning calorimetry (DSC), and universal testing machine (UTM). With BP and NVP UV grafting, the hydrophilicity of PLA films is improved, but their thermal and mechanical properties are reduced under different surface modification condition. Base on the principle of good surface hydrophilicity, better mechanical and thermal properties, the hydrolytic degradation performance of modified PLA films in artificial seawater at 70°C was studied by scanning electron microscopy, XPS and DSC. The research results show that the degradation of modified PLA films mainly occurs in the amorphous region, and the degradation process conforms to surface hydrolysis mechanism. The grafting modification of NVP is better than BP to accelerate the degradation process of PLA films in artificial seawater. The degradation of modified PLA undergoes water molecule erosion and autocatalytic degradation reaction. The degradation of BP-PLA obeys the first-order kinetics in part, while the degradation of NVP-PLA is more complex. Therefore, surface hydrophilicity modification is an effective technique for improving the degradability of PLA.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Qianjie Zhang,Pingli Wang,Dongmei Zhang,Shilian Zheng,Wanping Zhang
Hyaluronic acid (HA) is a mucopolysaccharide alternately linked by glucuronic acid and n -acetylglucosamine, which is usually used as a moisturizer in cosmetics. In this study, HA derivative (FA-HA) was prepared by modifying sodium hyaluronate with ferulic acid (FA). The chemical and morphological structure of FA-HA were characterized by UV, FTIR, 1 H-NMR, DLS and TEM. The results showed that FA was grafted onto HA chains via ester bonds and self-assembled into nanoparticles in aqueous solution. The introduction of FA endowed the nanoparticles with antioxidant function. The FRAP value of 10 mg/mL FA-HA was 1.985 mM, and the clearance rate of O 2 − , DPPH + and ABTS + could reach 83.13%, 88.86% and 99.48% respectively. Moreover, FA-HA can be used as Pickering emulsifiers to stabilize the emulsion. The results showed that the size of emulsion droplets decreased as the concentration of FA-HA increased. When the mass ratio of oil to water was 7/3, the emulsion droplets were the smallest. The addition of sodium chloride will increase the size of emulsion droplets, destroying the stability of the emulsion. In addition, FA-HA was also universal and was capable of emulsifying alkanes, esters, and natural oils, which was expected to be applied in the cosmetics and food fields.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Binhua Mei,Ju Bai,Yuhang Zhang,Yang Ma,Yanjun Hou,Shuhong Wang,Cheng Wang
Low-band gap semiconductor polymer materials play a crucial role in the field of organic optoelectronics. In this context, a series of low-band gap polymers containing thienopyrazine as the acceptor and cyclofluorene–bithiophene as the donor were synthesized and utilized in resistive random access memory (RRAM) devices. These memory devices consistently exhibit nonvolatile flash memory behavior. Remarkably, all three polymers demonstrate stability even after 1000 cycles without significant fluctuations. Notably, the three polymer-based devices also exhibit excellent ternary memory performance, with current ratios of 1:10 2.8 :10 4 , 1:10 1.3 :10 3.9 , and 1:10 1.8 :10 3.6 . Furthermore, the photoelectric properties of the three polymers and the conduction mechanisms of the memory devices were thoroughly discussed.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 34
·e55873
·
IF 2.7
Ling-Xiao Hu,Zhi-Cheng Wang,Zhi-Yi Guo,Tao Liu,Zhi-Gang Yuan,Mehdi Derradji,Wen-Bin Liu,Jun Wang
A series of triphenol-diamine-type hyperbranched benzoxazines are synthesized by using polyformaldehyde, 1,1,1-tri(4-hydroxyphenyl) ethane, and primary amines such as p -phenylenediamine, 4,4′-diaminodiphenylmethane, polyetheramine, and bifuranocyclic diamine via Mannich condensation. Then, copolymers with bifunctional benzoxazine (BA-a) are prepared to obtain superior properties. The polymerization behavior of the copolymers examined using a differential scanning calorimeter and a Fourier transform infrared indicates that the introduction of hyperbranched benzoxazines facilitates the benzoxazine curing reaction, decreasing the onset and peak temperatures of the curing process. Thermogravimetric analysis results suggest the cured hyperbranched benzoxazine demonstrates good thermal stability and can improve the heat resistance of benzoxazine. In addition, dynamic mechanical analysis suggests the glass transition temperature of the copolymers with BA-a was increased after copolymerization, thus making all the copolymers obtain higher service temperatures. The test results from the universal testing machine and the fracture morphologies of copolymers indicate the hyperbranched benzoxazines with branched structures cause dendritic folds to appear on the surface of copolymers upon polymerization, preventing rapid cracking and spreading of the thermoset resin by dissipating more impact energy through this irregular dendritic appearance, thus obtaining strength and toughness superior to that of BA-a resins.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Zhenfang Zeng,Wei Wei,Hao Li,Wen Li,Lijuan Bai,Mengling Wei,Jiabao Liu,Danmei Chen,Fuhou Lei
Developing an easily synthesized and efficient adsorbent for separating Panax notoginseng saponins (PNS) from Sanqi extract remains a significant challenge. Here, a novel rosin-based polymer composite (RBM/DT) was synthesized using hydrogenated rosin glycol acrylate (HREGA), divinylbenzene (DVB), and N,N-dimethylaminoethyl methacrylate (DMAEMA), in combination with diatomite, a naturally occurring adsorbent. The physicochemical properties of RBM/DT were characterized by multiple analytical techniques, revealing a mesoporous structure, narrow particle size distribution, and good thermal stability. Following the application of RBM/DT for the purification of PNS, the content of PNS increased markedly from 49.32% to 88.33%. Quantum chemical calculations indicated that van der Waals forces, hydrogen bonding, and electrostatic interactions contributed to the process. Thermodynamic analysis confirmed that the adsorption was spontaneous, endothermic, and involved chemisorption. Collectively, these findings suggest that RBM/DT is an effective, thermally stable, and reusable biosorbent for PNS purification from Sanqi extract.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2025
·
IF 2.8
Mingsheng Li,Yiming Xu,Shizhe Peng,Shiyang Yi,Jingwen Li,Zhongqi Guo,Yonghong Cheng,Lei Zhang
Silicone elastomers are valued for their mechanical and insulating qualities but traditionally cannot self-heal, limiting their long-term utility. This research presents a dynamic silicone network created using combed silicone precursors, effectively reducing synthesis costs and enhancing self-healing capabilities. The network incorporates dynamic cross-linking via aminopropyl groups that react with isocyanate and bulky secondary amines, giving materials that achieve over 80% healing efficiency for mechanical properties and can repair electrical breakdown holes. The material also shows excellent recyclability, retaining more than 80% of its mechanical properties and over 90% of its DC breakdown strength. Higher crosslink density improves mechanical strength and insulation but reduces healing and recycling efficiency. Conversely, increasing the content of dynamic bonds improves healability and reprocessability, although at some cost to mechanical strength. This innovative approach provides a cost-effective, highly functional solution for advanced electrical insulation needs.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Ying Hu,Xin Wu,Lin Zhou,Yan Kou,Ming Huang,Mao Chen
Epoxy resin, as a widely utilized insulating material in the field of electronic device encapsulation, faces challenges in achieving nondestructive disassembly of end-of-life devices and material recycling due to its three-dimensional cross-linked network structure, despite providing excellent mechanical properties. Additionally, it lacks autonomous repair capabilities when subjected to mechanical damage. To address these critical industry challenges, this study introduces dynamic disulfide bonds into the epoxy potting system, designing an epoxy vitrimer material with topologically reconfigurable network capabilities. This approach offers a viable solution for advancing the sustainable development of electronic encapsulation materials. The experiment employed an epoxy monomer containing dynamic disulfide bonds and a trifunctional thiol curing agent to prepare epoxy vitrimer potting insulation materials via a one-pot thiol-epoxy click reaction. The synthesized vitrimer demonstrates outstanding thermal stability ( T d = 318°C), electrical breakdown strength ( E b = 27.09 kV/mm), rapid stress relaxation behavior ( τ = 39 s), and superior hydrophobicity (contact angle = 118°). Furthermore, the encapsulated electronic components function normally, while the material's dynamic properties enable nondestructive recycling of components, autonomous repair of mechanical damage, and shape memory characteristics. The material maintains robust stability even after multiple high-low temperature cycles.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Zhigang Zhan,Wei Wu,Huanbo Hu,Junjian Ye,Lu Cui,Qiuyang Yu,Changxi Chen
This study presents the synthesis of a waterborne polyurethane (WPU-A) emulsion modified with (3-(2-aminoethyl)aminopropyl)trimethoxysilane (AEAPTMS). Self-cleaning materials were developed by applying WPU-A emulsions onto thermoplastic polyurethane (TPU) components, which were shaped using selective laser sintering (SLS), through a post-treatment impregnation and curing method. Additionally, superhydrophobic nano-SiO 2 (sn-SiO 2 ) was incorporated onto the surface of the TPU/WPU-A material. The resulting TPU/WPU-A/sn-SiO 2 self-cleaning composites were created, and the self-cleaning capabilities along with other characteristics of the two TPU-coated materials were examined individually. Findings indicated that the water contact angle for pure TPU measured 123.8°, while the TPU/WPU-A0.5/sn-SiO 2 -20, treated with WPU-A emulsion, exhibited an increased angle of 153.3°, achieving superhydrophobicity. The incorporation of sn-SiO 2 particles enhanced the surface roughness of the TPU/WPU-A0.5/sn-SiO 2 -20 material, facilitating the easy removal of surface contaminants. This enhancement contributes to improved anti-pollution properties and effective self-cleaning performance of the TPU material. The compressive strength of the TPU/WPU-A0.5/sn-SiO 2 -20 skeletonized parts reached 0.733 MPa, representing a 168% increase compared to the pure TPU skeleton. The TPU/WPU-A0.5/sn-SiO 2 -20 material, which is coated with WPU-A and integrated with sn-SiO 2 , demonstrates excellent self-cleaning and mechanical properties, indicating its potential for various applications.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Haoyue Wang,Shanshan Li,Tianliang Dai,Yang Yang,Lina Wang,Juming Yao,Guocheng Zhu,Baochun Guo,Parpiev Khabibulla,Ming Zhang
To address the increasingly diverse demands in modern society, it is essential to develop multifunctional textiles that possess both thermoregulation and UV-resistant properties. This study integrates coaxial and uniaxial electrospinning techniques to create multifunctional phase change nanofibers (PCNF) that exhibit high levels of hydrophobicity, ultraviolet (UV) resistance, and thermoregulation. During the coaxial electrospinning process, the thermal regulation of the nanofiber membrane is enhanced by incorporating octadecane into the core layer, resulting in a latent heat value of 82.47 J/g. Adding TiO 2 to the sheath layer significantly enhances the nanofibers' UV resistance, achieving a UV protection factor of 200.5. Furthermore, the inclusion of pearl-like microspheres through uniaxial electrospinning significantly boosts the hydrophobicity of the PCNF, resulting in a water contact angle (WCA) of 148° and excellent stain-resistant characteristics. This multifunctional composite membrane thus offers a highly promising solution for both outdoor protective applications and flexible wearable devices.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Jie Mao,Huiyao Zhao,Runqi Yang,Yongzhi Meng,Mao Pi,Yuan Wu,Wei Yuan
Silicone rubber serves as a critical insulating material in electrical engineering due to its outstanding antifouling characteristics, mechanical robustness, and electrical performance. Nevertheless, its insulating properties require further enhancement to meet the demanding requirements of ultra-high voltage (UHV) applications, particularly for long-distance, high-capacity power transmission. In this work, we developed an improved insulating silicone rubber by grafting p–p conjugated N -vinyl carbazole (VK) groups—known for their space charge trapping capability—onto thiol-silicone oil, followed by cross-linking with end-methyl branched vinyl silicone oil. The modified material demonstrated optimal insulating performance at a VK group concentration of 0.5 wt%, achieving a 23.19% increase in breakdown field strength compared to unmodified silicone rubber films. This study provides a viable approach for enhancing the dielectric strength of polymer-based silicone rubber materials.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Min Deng,Chuxiang Zhou,Gang Wu,Yinan Xu,Shenwen Fang,Ming Duan
Anisotropic particles have garnered significant attention due to their unique structural characteristics, and emulsion polymerization is one of the synthesis strategies. In this study, for the first time, poly(styrene-maleic anhydride) (SMAA) and small-molecule surfactant were employed as the composite emulsifiers during the emulsion polymerization of styrene (St) for synthesizing peanut-shaped polystyrene (PS) nanoparticles. The results of NMR, FTIR, and SEM confirmed this method was reliable. Furthermore, the polymerization conditions were optimized by using particle morphology as the primary optimization parameter. The optimized polymerization conditions are as follows: St concentration of 11 wt%, emulsifier concentration of 0.6 wt% in water, the emulsifier being a composite system of sodium dodecylbenzenesulfonate (SDBS) and SMAA in a mass ratio of 1:2, initiator concentration of 0.5 wt% (relative to St mass), crosslinker dosage 0.6 wt% (relative to St mass), reaction temperature of 70°C, and the reaction duration of 6 h. The resulting polymer products exhibited a distinct peanut-like morphology, with an average particle diameter of 54.1 nm and an aspect ratio of 2.44. These findings provide some novel insights into the preparation of anisotropic particles.
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高影响因子
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