【摘要】 在溶胀状态下进行纤维的热分析具有一定的优点。本文列举了12种不同组成和成形方式的聚丙烯腈纤维,在溶胀状态下的 TMA 和 DSC 分析结果。所测得的转变温度的下降符合 Flory 的熔点降低理论。此外,对一组溶胀聚丙烯腈共聚纤维的 DSC 图谱进行了分峰,并计算了4个组成峰相应的能量和探讨了它们相互间的数值关系。最后论证了热定型和热拉伸对聚丙烯腈纤维织态结构的影响,并初步指出了缠结在织态结构中的地位。更多还原

【Abstract】 Conducting thermal analysis of fibers in the swollen state possesses certaincharacteristics and advantages,The thermograms including both TMA and DSC of12 acrylic fiber samples of different composition and mode of formation are givenin this paper.The lowering of the transition temperature as a depression of themelting points according to the theory of Flory is tested.The DSC thermogramsof a commercial acrylic fiber sample are separated into its constituent peaks and thebond energy of the four regions is calculated.Finally the relation of the magni-tudes of the different peak of a PAC fiber sample is sought and the effects ofannealing and hot stretching of acrylic fibers on its texture are demonstrated.更多还原