Static and Dynamic Elasticities of PMMA Monolayers

Abstract

Abstract: Based on measuring and analyzing the π-A isotherms and their differentiate curves for monolayers of polymethyl methacrylate(PMMA) with different molecular weights, the formation and the effect of molecular weight on the phase transition of PMMA monolayers were discussed in detail. The dynamic elasticity of each monolayer was determined by barrier oscillation method and compared with its static elasticity. It is showed that the interactions such as skew and twist of the macromolecular chains have a great effect on the formation and the static and dynamic behavior of PMMA monolayer. Both of the static and dynamic elasticities are biphasic and the former is much smaller than the latter in general. With increasing molecular weight, the condensability and stability become more obvious and the static and dynamic elasticities are larger.

Key words: Polymethyl methacrylate, Monolayer, Dynamic elasticity, Molecular weight, Barrier oscillation method

CLC Number:

O631

TrendMD:

FANG Kun, ZOU Gang, HE Ping-sheng . Static and Dynamic Elasticities of PMMA Monolayers[J]. Chem. J. Chinese Universities, 2002, 23(12): 2386.

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Static and Dynamic Elasticities of PMMA Monolayers

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