Cavitation in Block Copolymer Modified Epoxy Revealed by In Situ Small-Angle X-Ray Scattering

被引：31
|
作者：
Declet-Perez, Carmelo [1 ]
Francis, Lorraine F. [1 ]
Bates, Frank S. [1 ]
机构：
[1] Univ Minnesota, Dept Chem Engn & Mat Sci, Minneapolis, MN 55455 USA
来源：
ACS MACRO LETTERS | 2013年 / 2卷 / 10期
基金：
美国国家科学基金会;
关键词：
MECHANICAL-PROPERTIES; MICROSCOPIC DEFORMATION; TOUGHENING MECHANISMS; PARTICLE-SIZE; RUBBER; POLYMERS; GROWTH;
D O I：
10.1021/mz4004419
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Simultaneous small-angle X-ray scattering (SAXS) and tensile experiments were performed on epoxies modified with approximately 30 nm diameter rubbery and glassy core block copolymer micelles. The in situ SAXS data, interpreted using established analytical models, reveals efficient and coherent cavitation of the spherical rubbery cores coincident with yielding and absence of cavitation in the glassy nanodomains. These results are quantitatively anticipated by recent theory that accounts for cavitation in rubber toughened plastics as a function of particle size.
引用
收藏
页码：939 / 943
页数：5
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