Influence of Domain Size on Toughness of Poly(styrene‐block‐butadiene) Star Block Copolymer/Polystyrene Blends
Influence of Domain Size on Toughness of Poly(styrene‐block‐butadiene) Star Block Copolymer/Polystyrene Blends
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DOI：
10.1002/marc.200400411
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发表时间：
2004-12
影响因子：
4.6
通讯作者：
R. Lach;R. Lach;R. Weidisch;A. Janke;K. Knoll
中科院分区：
文献类型：
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作者：
R. Lach;R. Lach;R. Weidisch;A. Janke;K. Knoll
用基本断裂功法研究了聚苯乙烯-嵌段-丁二烯星星嵌段共聚物/聚苯乙烯（PS）共混物的韧性。共混物显示出由所使用的挤出工艺产生的富含聚苯乙烯和富含聚丁二烯的域的共连续或层状结构。发现在聚苯乙烯富集区的临界尺寸约为50 nm处出现韧脆转变，在20- 30%PS（共连续形态）处出现非必要断裂功的最大值。
The toughness of poly(styrene-block-butadiene) star block copolymer/polystyrene (PS) blends have been investigated using the essential-work-of-fracture approach. The blends show a co-continuous or layer-like structure of polystyrene-rich and polybutadiene-rich domains arising from the used extrusion process. A tough-to-brittle transition at a critical domain size of polystyrene-rich domains of about 50 nm and a maximum in the non-essential work of fracture at 20-30% PS (co-continuous morphology) have been found.