甲基氧丙環與酸酐聚酯及其變性聚酯之研究

Studies on the Polyester Based Propylene Oxide with Anhydrides and It's Modifications

朱宗正(Tzong-Jeng Chu) ； 黃棟樑(Tuang-Liang Huang)

《化學》 44卷2期 (1986/06) Pp. 65-74

https://doi.org/10.6623/chem.1986018

摘要

本研究係採用半連續式塊狀聚合法，於氮氣中進行甲基氧丙環與酸酐之聚合反應。所用酸酐爲等莫耳數的酞酐和馬來酑之混合物，並以丙二醇爲起始劑，氧化鋅或化鋰為觸媒。由實驗結果得知，增加丙二醇之量，則聚酯反應速率隨之增快，但聚合度卻相對地降低。由核磁共振譜發現所合成之聚酯分子鏈中存在有聚醚之部分塊體，而此種特殊聚酯玻璃纖維所構成之複合材料，其機械和電氣特性優於不具有聚醚塊體之聚酯者，唯在收縮率上，前者較後者略大，但仍小於由丙二醇與酸酐所合成之一般聚酯。另一方面，以雙酚A及聚對苯二甲酸乙二酯(PET)乃變性劑所得變性聚酯。並未顯著改善機械特性，此係因雙酚A及PET在聚酯反應中，均具有起始劑的作用，使得聚酯的聚合度降低之故。

並列摘要

The semi continuous bulk polymerization of propylene oxide with anhydrides (phthalic anhydride and maleic anhydride) was carride out under nitrogen atmosphere, using propylene glycol as starter, with zinc oxide and lithium chloride as catalyst respectively It was found that the rate of polymerization increases with the increasing propylene glycol, but the molecular weight of polyester becomes smaller. From the NMR analysis, it is evident that the resulting polyester contains block propylene oxide units, and the mechanical and electrical proper- ties of the composite material from this particular polyester with glass fiber are better than that of polyester contains polyester units only. It was also found that the bisphenol A or PET modified polyesters do not improve on mechanical properties of the composite materials , it may be due to that these modifiers behave as starters and reduce the degree of polymerization.