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首页> 外文期刊>Journal of Applied Polymer Science >Crystallization behavior and isothermal crystallization kinetics of polylactide/polystyrene-b-polybutadiene-b-polystyrene blends compatibilized with poly(styrene-ran-methyl acrylate)
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Crystallization behavior and isothermal crystallization kinetics of polylactide/polystyrene-b-polybutadiene-b-polystyrene blends compatibilized with poly(styrene-ran-methyl acrylate)

机译：聚乙酯/聚苯乙烯-B-聚丁二烯-B-聚苯乙烯共混物的结晶行为和等温结晶动力学（苯乙烯 - 丙烯酸苯甲酸甲酯）

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摘要

The morphology, non-isothermal and isothermal crystallization behavior, and spherulite growth of polylactide (PLA)/polystyrene-b-polybutadiene-b-polystyrene (SBS) blends were investigated in the presence of a poly(styrene-ran-methyl acrylate) (S-MA) compatibilizer synthesized using surfactant-free emulsion copolymerization. Scanning electron microscopy revealed that the SBS dispersed-phase became more uniform and refined as the amount of S-MA compatibilizer was increased from 0 to 3 wt%. Calorimetric characterization of the non-isothermal and isothermal crystallization behavior analyzed using Avrami theory shows that the SBS in PLA shows plasticization and dilution effects simultaneously. When the PLA matrix chains do not move easily and/or its effective crystallization time window is narrow, the plasticization effect of the SBS is more significant. However, when the PLA matrix chains move more easily and/or its crsytallization window is wide, the dilution effects effect of the SBS is more notable. After the addition of S-MA, the plasticization and dilution effects were enhanced.
机译：在无表面活性剂乳液共聚合成的聚（苯乙烯-丙烯酸甲酯）（S-MA）相容剂存在下，研究了聚乳酸（PLA）/聚苯乙烯-b-聚丁二烯-b-聚苯乙烯（SBS）共混物的形态、非等温和等温结晶行为以及球晶生长。扫描电镜显示，随着S-MA相容剂用量从0%增加到3%，SBS分散相变得更加均匀和细化。用Avrami理论分析的非等温和等温结晶行为的量热表征表明，PLA中的SBS同时表现出增塑和稀释效应。当PLA基体链不易移动和/或其有效结晶时间窗口较窄时，SBS的塑化效应更为显著。然而，当PLA基体链更容易移动和/或其Crsytalization窗口较宽时，SBS的稀释效应更为显著。添加S-MA后，增塑和稀释效果增强。

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