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Effects of a Diblock Copolymer on Adhesion between Immiscible Polymers: 1. Polystyrene(PS)-PMMA Copolymer between PS and PMMA

Cited 204 time in Web of Science Cited 202 time in Scopus
Authors
Brown, H. R.; Char, K.; Deline, V. R.; Green, P. F.
Issue Date
1993-08
Publisher
American Chemical Society
Citation
Macromolecules, 1993, 26, 4155
Abstract
Thin layers of polystyrene (PS)-poly(methy1m ethacrylate) (PMMA)d iblock copolymers were placed at the interface between PS and PMMA homopolymers, and the samples were joined at high temperatures. Fracture testa were used to measure the interface toughness, and secondary ion ma88 spectroscopy (SIMS) was used to examine the organization of the diblock. Diblock copolymers with molecular weights of 84 OOO and above gave strong interfaces whose saturation toughness was independent of the copolymer molecular weight. Both kinetic studies and the SIMS results showed that the rate of diblock copolymer organization was a function of the layer thickness. Copolymer layers of thickness greater than about onefourth of a long period did not organize in a simple way at the interface but gave interfaces with a high toughness. For thin layers that did organize, the toughness was low and the diblock molecules broke near their junction points. Low molecular weight symmetric and asymmetric diblocks were shown to give lower toughnesses than the high molecular weight materials, probably because they were pulled out of the PS homopolymer.
ISSN
0024-9297 (print)
1520-5835 (online)
Language
English
URI
http://hdl.handle.net/10371/5747
DOI
https://doi.org/10.1021/ma00068a014
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
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