聚碳酸亚丙酯纤维的制备及其力学性能  

Preparation and Mechanical Properties of Poly(propylene carbonate)Fiber

作　　者：虞卿磊 张宇静 许震[2,3] 张成建 张兴宏[1,3] Qing-lei Yu;Yu-jing Zhang;Zhen Xu;Cheng-jian Zhang;Xing-hong Zhang(State Key Laboratory of Biobased Transportation Fuel Technology,Zhejiang University,Hangzhou 310058;MOE Key Laboratory of Macromolecular Synthesis and Functionalization,Zhejiang University,Hangzhou 310058;Department of Polymer Science and Engineering,Zhejiang University,Hangzhou 310058)

机构地区：[1]浙江大学生物基运输燃料技术全国重点实验室,杭州310058 [2]浙江大学高分子合成与功能构造教育部重点实验室,杭州310058 [3]浙江大学高分子科学与工程学系,杭州310058

出　　处：《高分子学报》2025年第1期145-151,共7页Acta Polymerica Sinica

基　　金：国家自然科学基金(基金号U23A2083);浙江省科技计划项目(项目号2022C01216)资助.

摘　　要：聚碳酸亚丙酯(PPC)是由二氧化碳(CO_(2))与环氧丙烷(PO)交替共聚得到的一种可降解高分子材料,极具应用前景.然而,有关纯PPC纤维的制备及其性能方面的研究仍较少.本文工作采用湿法纺丝技术制备了PPC长丝,优选出PPC成纤效果最佳的纺丝溶剂和凝固浴,并通过控制不同的后处理温度和牵伸倍数,研究了PPC长丝的纤维取向、热性能及其力学性能.研究结果表明,以N,N-二甲基甲酰胺(DMF)为溶剂,H_(2)O为凝固浴制备得到的PPC原纤性能最佳.PPC原纤经过后牵伸处理后得到具有高取向结构的PPC纤维长丝.其中,于45℃水浴拉伸400倍后得到的PPC长丝,拉伸强度可达201.9 MPa,断裂伸长率为36.4%,弹性模量可达2.9 GPa.本研究对拓宽PPC的应用领域具有积极的意义.Poly(propylene carbonate)(PPC)is a biodegradable polymer that can be produced by alternating copolymerization of carbon dioxide(CO_(2))and propylene oxide(PO).It is a typical amorphous polymer with the glass transition temperature of 30−40℃,and thus is considered to be difficult to spin.The research on the preparation and properties of neat PPC fiber is rare.In this study,we prepared PPC filaments by wet spinning method,and the spinning solvent and coagulation bath were selected as N,N-dimethylformamide(DMF)and water,respectively.The uniform PPC/DMF solution was transferred to the syringe and then extruded at the speed of 160μL/min,passing through a 4 m long water coagulation bath.The obtained PPC nascent fiber(no further stretching)was collected on a wire collector and vacuum dried to constant weight at room temperature.The dried PPC nascent fibers are clamped on a high-precision fiber stretching machine and stretched at a certain speed in a water bath at set temperatures(e.g.45℃)to obtain PPC filaments with different stretching multiples.The orientation,thermal properties and mechanical properties of PPC filaments were studied by changing post-treatment drafting times and temperatures.Tg values of the PPC filaments achieved 31.6℃,increased by about 2℃after stretching.The maximum stretching limit of PPC filaments can reach 1020 times of PPC nascent fiber;generally,it can be stretched about 600 times,and the diameter of the resulting PPC filaments is about 10μm.The tensile strength of PPC filaments stretched 400 times at 45℃at room temperature can reach 201.9 MPa,which is 20 times that of PPC sheet,87 times that of PPC/polybutylene succinic acid(PBS)composite fiber membrane,9.2 times that of PPC/poly(3-hydroxybutyrate)(PHB)composite fiber,and 9.7 times that of PPC/polylactic acid(PLA)composite fiber.The room temperature elastic modulus can reach 2.9 GPa,which is 4.1 times that of PPC sheet.The great improvement of its mechanical properties is attributed to a certain degree of highly ordered structur

关 键 词：聚碳酸亚丙酯 CO_(2)聚合物 湿法纺丝 纤维取向 力学性能 

分 类 号：TQ342[化学工程—化纤工业]