氯化聚丙烯的制备与性能研究

本文针对聚丙烯(PP)粘合性差、较难染色、低温呈脆性、收缩率大等缺陷,采用溶液法对聚丙烯进行氯化改性,以AIBN(BPO)为引发剂,氯苯为溶剂,进行自由基引发接枝反应制取氯化聚丙烯(CPP)。通过滴定法得出氯化度的值,并对反应时间、反应温度、引发剂浓度等条件进行考察,得出最优氯化工艺条件,采用红外技术(FT-IR)对CPP加以表征,从溶解性能方面加以分析,进一步阐述了氯化度对其性能的影响。实验结果表明,该法可以得到氯原子的接枝产物,在反应温度120℃,反应时间5h时,CPP的氯化度最高可达52%,氯化度越高溶解度越高。

Preparation and performance study of chlorinated polypropylene

As polypropylene（PP） adhesive properties is poor, and it is difficult to dye its fibre, what’s more, it is brittle at low temperature, and its shrinkage is large. In order to overcome these disadvantages, pp is modified by chlorination in this paper. Concretion content as follows： we use the AIBN （BPO） as the initiator and the chlorobenzene as the solvent to do the free radical grafting reaction to make up CPP. We obtain the chlorinated degree by titration. By studying the influence of reaction time, reaction temperature on chlorination reaction, we can get the optimal chlorination process conditions. And the CPP are characterized by FT-IR, analyzed from the aspects of dissolving properties, to further understand the impact of chlorinated degree on its performance. The ex-perimental results show that when the reaction temperature is 120℃, and reaction time is 5h, the highest chloride degree can reach 52%. We know that the higher the degree of chlorination is, the higher the solubility could be.