【作者】 张兴祥； 高希银； 韩娜； 唐孝芬；

【Author】 ZHANG Xing-xiang,GAO Xi-yin,HAN Na,TANG Xiao-fen (Tianjin Municipal Key Lab of Fiber Modification and Functional Fiber,Institute of Functional Fibers,Tianjin Polytechnic University,Tianjin 300160,China)

【机构】 天津工业大学功能纤维研究所改性与功能纤维天津市重点实验室；

【摘要】 采用30℃下的水相沉淀法制备了含0～25%(质量分数)正十八烷微胶囊的丙烯腈/丙烯酸甲酯(摩尔比85/15)共聚物,聚合产物在190～220℃下熔融挤出制成纤维,并采用傅里叶变换红外光谱(FTIR)、核磁共振(NMR)、差热分析(DSC)、X射线衍射(XRD)、扫描电子显微镜(SEM)等方法对聚合产物和初生纤维进行了分析。结果表明,聚合产物的组成比与投料比相近,随着相变材料微胶囊的增加,共聚物的玻璃化转变温度(T_g)升高,熔融温度升高,结晶度下降,纤维具有良好的储热性能。相变材料微胶囊含量为25%(质量分数)时,热焓可达24.5J/g,热焓效率高于熔纺储热调温丙纶,该纤维具有很好的应用前景。更多还原

【Abstract】 Acrylonitrile/methyl acrylate copolymers(molar ratio 85/15) containing 0-25wt%microencapsulated n-octadecane(MicroPCMs) were fabricated at 30℃by aqueous redox initiated polymerization.Resultant polymers were melt-extruded at 190-220℃to form fibers.The structure and properties of the copolymers and fibers were characterized using Fourier Transformed Spectroscopy(FTIR),Nuclear Magnetic Resonance(NMR), Differential Scanning Calorimetry(DSC).X-ray Diffraction(XRD) and Scanning Electronic Microscopy (SEM).The results show that,the composition of copolymers is equivalent to the molar ratio in reactant.Both the glass transition temperature(Tg) and melting temperature of the copolymers increases as the content of MicroPCMs increases.By contrast,the crystallinity of the copolymers decrease as the content of MicroPCMs increases. The enthalpy of thermo-regulated fiber containing 25wt%MicroPCMs is 24.5J/g.The efficiency of enthalpy is higher than that of melt-spun thermo-regulated polypropylene fiber.The future application of these fibers is promising.更多还原