ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract Defect formation in epoxies due to the chemical shrinkage was observed during isothermal cure over a wide cure temperature range. The observed defects were cohesive cracks and adhesional failures. The influence of the mutual position of the gel and the glass transition points on shrinkage-defect formation was examined. The different types of the cohesive defects can arise in the curing system in both the rubbery and glassy state. The type of defect formed was found to be determined by the relaxational state of the polymer during defect formation. The dependence of the glass transition temperature upon the degree of polymerization is reported for the epoxy/amine polymer system investigated. Experimental parameters of polymer resistance to chemical shrinkage cracking were measured for all investigated cure temperatures.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00353193
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