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Autoadhesion of Glassy Polymers
Author(s) -
Boiko Yuri M.
Publication year - 2012
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201250609
Subject(s) - materials science , glass transition , polymer , composite material , amorphous solid , shear (geology) , shear strength (soil) , surface tension , lap joint , thermodynamics , chemistry , crystallography , environmental science , physics , soil science , soil water
Abstract Summary: Thick bulk films of linear amorphous polymers with different chain architecture and molecular weight were brought into contact with themselves in a lap‐shear joint geometry at bonding temperatures ( T ) below the glass transition temperatures of their bulk ( T g bulk ), at a small contact pressure, in order to form autoadhesive joints. As‐bonded joints were shear‐fractured in tension at ambient temperature, and their lap‐shear strength was measured as a function of T , bonding time and molecular weight. The kinetics of the process of the development of the lap‐shear strength at T < T g bulkwas investigated, and the molecular mechanisms governing this process were discussed. The quasi‐equilibrium surface glass transition temperatures of the investigated polymers were estimated and compared with the corresponding values of T g bulk .