Thiol‐ene click chemistry for constructing transition layer to enhance the interface interaction between polyacrylonitrile fiber and styrene‐butadiene‐styrene modified asphalt,Journal of Applied Polymer Science

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Thiol‐ene click chemistry for constructing transition layer to enhance the interface interaction between polyacrylonitrile fiber and styrene‐butadiene‐styrene modified asphalt
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2024-02-29 , DOI: 10.1002/app.55381
Panpan Zhang ₁ , Susu Xing _{2,

3} , Zibo Lin _{2,

3} , Zhenxia Zhao _{2,

3} , Hao Kong _{2,

3} , Jing Li _{2,

3}

Affiliation

Based on the high chemical stability and excellent end‐group functionalization capability of polyhedral oligomeric silsesquioxane (POSS), this study utilized thiol‐functionalized POSS (POSS‐SH) in a click chemistry reaction with styrene‐butadiene‐styrene triblock copolymer (SBS). The objective was to design a functional group forming a chemical bond with the polymer matrix, resulting in the preparation of thiol‐functionalized polyacrylonitrile (PAN) fibers chemically cross‐linked with POSS‐SH/PAN/SBS hybrid material. This hybrid material not only enhanced the compatibility between the components but also facilitated a connection between the fiber and SBS, thereby improving the mechanical properties of the modified asphalt. Fourier transform infrared spectroscopy, field emission scanning electron microscopy (FESEM), and atomic force microscopy analyses confirmed the successful modification of POSS‐SH/PAN fibers. FESEM analysis of the modified asphalt verified that POSS‐SH/PAN fibers contributed to strengthening the interfacial performance between the fiber and asphalt. Cone penetration and dynamic shear rheometer tests indicated that, compared to SBS‐modified asphalt, PAN/SBS and POSS‐SH/PAN/SBS‐modified asphalt exhibited enhanced shear strength, deformation resistance, and viscoelastic properties. Additionally, at 46°C, the storage modulus (G′) of 1.5% POSS‐SH/PAN/SBS‐modified asphalt increased by 11% compared to 1.5% PAN/SBS asphalt, with increases of 13.75% and 10.8% in loss modulus (G″) and complex modulus (G*), respectively.

中文翻译：

硫醇-烯点击化学构建过渡层以增强聚丙烯腈纤维与苯乙烯-丁二烯-苯乙烯改性沥青之间的界面相互作用

基于多面体低聚倍半硅氧烷（POSS）的高化学稳定性和优异的端基官能化能力，本研究利用硫醇官能化POSS（POSS-SH）与苯乙烯-丁二烯-苯乙烯三嵌段共聚物（SBS）进行点击化学反应。目的是设计一个与聚合物基体形成化学键的官能团，从而制备与 POSS-SH/PAN/SBS 杂化材料化学交联的硫醇官能化聚丙烯腈 (PAN) 纤维。这种混合材料不仅增强了组分之间的相容性，而且有利于纤维与SBS之间的连接，从而提高了改性沥青的力学性能。傅里叶变换红外光谱、场发射扫描电子显微镜（FESEM）和原子力显微镜分析证实了 POSS-SH/PAN 纤维的成功改性。改性沥青的FESEM分析证实POSS-SH/PAN纤维有助于增强纤维和沥青之间的界面性能。锥入度和动态剪切流变仪测试表明，与 SBS 改性沥青相比，PAN/SBS 和 POSS-SH/PAN/SBS 改性沥青表现出增强的剪切强度、抗变形能力和粘弹性能。此外，在46℃下，1.5% POSS-SH/PAN/SBS 改性沥青的储能模量（G′）比 1.5% PAN/SBS 沥青增加了 11%，损耗分别增加了 13.75% 和 10.8%分别是模量 (G″) 和复数模量 (G*)。

更新日期：2024-02-29

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