Influence of Flexible Poly(Trimethylene Sebacate) Segments on the Lamellar Twisting Behavior of Poly(Trimethylene Terephthalate) Ring-Banded Spherulites
作者： Jun Li , Zhen Hu , Zongbao Wang , Qun Gu , Yuzhong Wang
DOI: 10.1021/IE302406T
关键词: Crystallization 、 Polymer crystals 、 Crystallography 、 Polymer chemistry 、 Poly(trimethylene terephthalate) 、 Spherulite 、 Materials science 、 Lamellar structure
摘要: Ring-banded spherulite is an important morphology of polymer crystals, and its formation mechanism still under debate. In this study, we synthesized poly(trimethylene terephthalate)-co-poly(trimethylene sebacate) copolyesters (PTT-co-PTS) by melting copolycondensation studied the influence PTS segments on crystallization ring-banded terephthalate) spherulites using a moderate etching technology. It found that he band spacing PTT-co-PTS decreased sharply with content. confirmed experiments there are twofold reasons for sharp decrease in spherulites. First, acted as diluents PTT molecules, which intensified unbalanced surface stress at fold surfaces lamellar twisting. Second, incorporation thickness lamellae, greater content, thinner lamellae. Both these two changes signif...
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