Assessment of compatibilization efficiency of triblock copolymer in immiscible polymer blends
Assessment of compatibilization efficiency of triblock copolymer in immiscible polymer blends
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三嵌段共聚物在不混溶聚合物共混物中的增容效率评估
DOI：
10.1002/app.46244
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发表时间：
2018
影响因子：
3
通讯作者：
Li Guangxian
中科院分区：
文献类型：
--
作者：
Zhao Xueyan;Huang Yajiang;Kong Miqiu;Yang Qi;Li Guangxian
从形态结构、流变学和分级结晶行为等方面研究了苯乙烯-乙烯/丁烯-苯乙烯（SEBS）三嵌段共聚物对不相容聚丙烯（PP）/聚苯乙烯（PS）20/80共混物的增容作用。除了改变SEBS负载之外，使用四种不同的混合方案来改变SEBS分散状态。采用两步法制备的PP 2/PS/SEBS共混物，在临界相容剂浓度（CCC = 1wt%）下，液滴尺寸最大（1.278 μm）。然而，通过其他方案制备的共混物的CCC为2wt%。在CCC条件下，PP/PS 2/SEBS（以PP和SEBS混合为主的两步法）的液滴粒径最小（0.908 μm），其次是PP/PS/SEBS（一步法）。PP/PS共混体系的流变学和结晶行为也可以用来评价SEBS的增容效果，但仅限于在相同的混合方案下和SEBS含量低于CCC的情况下。© 2018威利期刊股份有限公司J.应用聚合物Sci.2018，135，46244.
The compatibilization efficiency of styrene–ethylene/butylene–styrene (SEBS) triblock copolymer in immiscible polypropylene (PP)/polystyrene (PS) 20/80 blends was evaluated in terms of not only morphology, but also rheology and fractionated crystallization behavior. Besides varying SEBS loading, four different mixing protocols were used to vary SEBS dispersion state. PP2/PS/SEBS blend, prepared by two‐step method mixing PS and SEBS primarily, presents the largest droplet size (1.278 μm) at the critical compatibilizer concentration (CCC = 1 wt %). However, the CCC of blends prepared by the other protocols is 2 wt %. And at the CCC, PP/PS2/SEBS (two step method mixing PP and SEBS primarily) shows the smallest droplet size (0.908 μm), followed by PP/PS/SEBS (one step method). The rheology and crystallization behavior of PP/PS blends could also be utilized to assess the compatibilization efficiency of SEBS, but only in the case of mixing under the same protocol and the content of SEBS below a CCC. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci.2018,135, 46244.