聚甲醛及其纤维的热分析研究  

Thermal Analysis of Polyoxymethylene and its Fiber

作　　者：邵群[1] 文珍稀[1] 林佩洁[1] 郭志洪[1] 倪建华[2] 王依民[2] 

机构地区：[1]东华大学材料科学与工程学院,上海201620 [2]东华大学纤维材料改性国家重点实验室,上海201620

出　　处：《合成纤维》2011年第7期9-13,共5页Synthetic Fiber in China

摘　　要：用Ozawa法和Mo法对聚甲醛(POM)的非等温结晶动力学进行研究。采用双螺杆纺丝机熔融纺得POM初生纤维,再用水浴拉伸方法制得POM纤维,研究拉伸倍数、水浴温度对POM纤维结晶性能的影响。结果表明:在不同的降温速率下,随着降温速率的提高,POM结晶峰峰值温度降低,半结晶时间缩短,结晶速率加快;采用Mo法研究POM的非等温结晶过程比较理想,而Ozawa法不适用;水浴拉伸有利于纤维的结晶,而随着水浴温度的提高,POM纤维的结晶度提高。Polyoxymethylene （POM） fiber is prepared by two step processes, melt spinning by twin-screw extruder and drawing in a water bath. Experiments are carried out to study the impact of drafting multiple and the temperature of water bath on the crystallization properties of POM fiber, and the non-isothermal crystallization kinetics of POM fibers is studied with Mo and Ozawa method. The experimental results show that as the cooling rate is increased, the crystallization peak temperature and half crystallization time decrease, meanwhile the crystallization rate increases at different cooling rate. The Avrami analysis modified by the Mo method can describe the non-isothermal crystallization processes of POM very well, and with the increases of crystallinity, crystallization rate slows down. Drawing is good for the crystallization of fiber and refines the crystalline grain. As the temperature of water bath increases, the crystallization rate increases.

关 键 词：结晶动力学 聚甲醛纤维 拉伸倍数 水浴温度 结晶性能 

分 类 号：TQ342.791[化学工程—化纤工业]