Effects of different long-chain molecules on properties of thermally-reversible transparent imaging materials;
长链分子对热可逆透明成像材料性能的影响
Compared with PBT/PET blend,the crystallinity of PBT/PCET blend is enhanced obviously,and the effect of ethylene glycol adipate is better,the crystalinity of PBT increases and that of PCET decreases with the increase in PBT content of copolyester in PBT/PCET blend.
本研究工作表明,以在PET分子链中引入少量柔性链分子如对苯二甲酸丁二醇酯、己二酸乙二醇酯等组成的共聚酯(PCET)与PBT共混,相对PBT/PET共混体系,PET/PCET共混体系的结晶度明显提高,即结晶更加完全,且以引入己二酸乙二醇酯效果更好;随共聚酯中PBT含量增加,共混体系中PBT结晶度一般升高,而PCET结晶度降低;共混体系即使从熔体以320℃/min快速冷却,其结晶也是完全的。
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