用GPC法测定了PC样品的分子量及其分布,用 原位动态FT-IR、TG对国内外生产的PC样品的热稳定性进行了研究。结果表明,PC样品的分 子量及其分布是影响PC热稳定性的主要因素,分子量越大、分布指数越小、低分子含量越低, 则PC越稳定。
The molecular distribution has been measur ed with Gel-permeation Chromatography. The results show that the distribution of PC prepared by foreign countries is narrower than that of the domestic. The thermal stability of PC studied by in-situ dynamic FT-IR displays that the broken temperature range of ether linkage of PC is 350～380 ℃. The results of TG analysis show that the starting temperature range of decomposition of PC is 350 ～370 ℃, and the decompositing temperature range is 450～500 ℃. The difference of thermal stability between samples mainly lies in the molecular distribution of samples.
参考文献
| [1] | 陈燕;唐小斗 .[J].材料导报,1997,11(01):57. |
| [2] | 金日光;华幼卿.高分子物理[M].北京:化学工业出版社,1991:15-18. |
| [3] | 南爱玲 .聚碳酸酯结构与热稳定性和表现性能关系的研究[D].北京化工大学,1998. |
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