聚甲基丙烯酸十八烷基酯/长链脂肪醇共混物的热性能

纺织学报 ›› 2015, Vol. 36 ›› Issue (02): 7-12.

聚甲基丙烯酸十八烷基酯/长链脂肪醇共混物的热性能

收稿日期:2014-10-09 修回日期:2014-11-04 出版日期:2015-02-15 发布日期:2015-02-13
通讯作者: 石海峰 E-mail:hfshi@tjpu.edu.cn

Thermal performance of poly(stearyl methacrylate) and long-chain fatty alcohol composites

Received:2014-10-09 Revised:2014-11-04 Online:2015-02-15 Published:2015-02-13

摘要/Abstract

摘要：

以物理共混法制备了质量比为60:40的不同碳链长度脂肪醇和聚甲基丙烯酸十八烷基酯共混物(CnOH60/PSMA40)，并利用傅立叶变换红外光谱（FTIR）、差示扫描量热仪（DSC）、X-射线衍射（XRD）、热重分析（TG）和偏光显微镜（POM）等方法对CnOH60/PSMA40共混物的结构、热性能、相转变及结晶行为进行了研究。结果表明，对于CnOH/PSMA（60/40）共混物，当n=14、16时共混物出现黑十字消光球晶，尺寸大约在250μm左右；当n=18、26时没有观察到球晶形态。CnOH60/PSMA40共混物的热焓和热稳定性随脂肪醇侧链长度的增加而逐渐增加，并呈现出复杂化的趋势。从结晶成核和侧链结晶角度对共混物的结晶形态进行了探讨，同时分析了共混物作为热能储存材料使用的可能性。

关键词: 脂肪醇, 聚甲基丙烯酸十八烷基酯, 储能材料, 球晶

Abstract:

A series of composites based on different side-chain length fatty alcohol (CnOH, n=14,16,18,26) and poly(stearyl methacrylate) (PSMA) with weight ratio of 60:40 are prepared by physical mixing method. The structures, thermal performances, phase change behaviors and crystallization behaviors of were investigated by Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD), thermogravimetric analysis (TGA) and polarized optical microscopy (POM). The C14OH/PSMA and C16OH/PSMA composites exhibit maltese cross of polymer spherulite, and their size is approximately ca. 250 μm. However, for C18OH/PSMA and C26OH/PSMA composites, no polymer spherulite morphology is founded. The heat enthalpy and thermal stabilities of CnOH/PSMA composites increases with the side-chain length of CnOH, and it shows the complicated variation behavior. The crystal morphology is deeply discussed from the aspect of crystal nucleation and side-chain crystallization behavior, and the end-use possibility of thermal energy storage is also clarified.

Key words: fatty alcohol, poly(stearyl methacrylate), energy-saving material, spherulite

中图分类号:

O631

孙青青王海霞石海峰张兴祥. 聚甲基丙烯酸十八烷基酯/长链脂肪醇共混物的热性能[J]. 纺织学报, 2015, 36(02): 7-12.

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