• 作者： Tsai, Hong-Bing; Chang, Shina-Jen; Chen, Mei-Suiet al.
• 中文摘要： 各種不同分子量之1,4-丁二醇,對苯二甲酸,間苯二甲酸及1,6-己二酸之共聚酯以熔融聚縮合製得,其分子量以對苯基苯甲酸(PB系列)或苯甲酸(B系列)來控制。其中僅有對苯基苯甲酸可成功地來控制共聚酯之分子量。 PB系列共聚酯之分子量可由對苯基苯甲酸與二酸之莫耳比來預測。分子量對PB系列共聚酯之 T/sub g/之影響很小,T/sub g/隨分子量之降低而緩慢降低。然而,共聚酯之熔融黏度隨分子量之增高而顯著提高。共聚酯可用為熱熔膠,分子量較低時,疊剪強度隨分子量之增高而顯著提高,但.Mbar./sub w/大於30,000後,分子量對於疊剪強度之影響不大。
• 英文摘要： Copolyesters of 1,4-butanediol, terephthalic acid, isophthalic acid, and adipic acid with different molecular weights were prepared by melt polycondensation in the presence of p-phenylbenzoic acid (PB series) or benzoic acid(B series). Only p-phenylbenzoic acid was successful in controlling the molecular weight. The molecular weight of PB series could be predicted by the molar ratio of p- phenylbenzoic acid to diacids. T/sub g/ of PB series decreased slightly as the molecular weight of copolyesters decreased. The Brookfield melt viscosity decreased significantly with decreasing molecular weight. Copolyesters were used as hot melt adhesives, the lap shear strength increased as the molecular weight increased and then leveled off as the IV was above 0.6 dL/g.
• 中文關鍵字： 共聚酯; 熱熔膠; 分子量控制; 熔融黏度; 疊剪強度
• 英文關鍵字： Copolyesters; Hot Melt Adhesive; Molecular Weight Control; Melt Viscosity; Lap Shear Strength