水相氯化法等规聚丙烯的分子结构与热性能研究

水相氯化法合成不同氯质量分数的CIPP,采用DSC、FT-IR及TG对制得的样品进行分析和表征。研究结果表明,氯原子的引入使得IPP的结晶度下降;氯化过程中IPP的伯、仲、叔氢原子具有不同的反应活性,遵循伯氢>仲氢>叔氢的活性顺序;在N2气氛下的热降解过程中,CIPP中不同的碳-氯原子对CIPP的热稳定性有不同影响,叔碳-氯原子是影响CIPP热稳定性的主要因素。

Study on the molecular structure of CIPP made by aqueous suspension and thermal behavior of the products

Several kinds of chlorinated isotatic polypropylene(CIPP) with different chlorine content were prepared by the aqueous method,and they were characterized by DSC,FT-IR and TG.The results indicate that the crystallinity of the isotatic polypropylene(IPP) decreased with the introduction of chlorine atoms,and that chlorination activity of the H-atoms in IPP is in accordance with the following sequence: CH_3>CH_2>CH.The process of thermal degradation of CIPP in the N__2 atmosphere indicate that different C-Cl atoms had different effects on the thermal stability of CIPP,and the main influencing factor may be the existence of tert-carbon-chlorine atoms.