Statistical aspects of the strength evolution at interfaces of compatible dissimilar amorphous polymers with radically different glass transition temperatures
Boiko Y. M.
11Ioffe Institute, St. Petersburg, Russia
Email: yuri.boiko@mail.ioffe.ru
Using the Weibull's and the normal probability methods and a series of tests for normality, a statistical analysis of the distributions of adhesive strength σ developing at the contact zone of the samples of polystyrene (PS) and poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) has been performed. The contact has been carried out in the region of the glass transition temperature Tg of PS corresponding to the region T<Tg-100oC for PPO. The most correct type of the σ distribution has been determined. The compliance with the null hypothesis of the normal probability for the arrays of the σ distributions has been analyzed. A new approach has been proposed that allows for a correct comparison of the σ dispersion within the framework of various statistical methods of analysis. Keywords: amorphous polymers, interfaces, adhesion, strength, statistics.
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