ASTM D411电绝缘试验用紫胶片标准试验方法
日期:2012-02-08 11:50
ASTM D411 Standard Test Methods for Shellac Used for Electrical Insulation
ASTM D411电绝缘试验用紫胶片标准试验方法
Polymerization time provides a measure of time during which shellac retains its plasticity and flow properties at the specified temperature before gelling or polymerizing to the tough rubbery insoluble form. This test is important in determining the quality of different lots, useful shelf-life, batch uniformity, and processing characteristics of shellac.
1. Scope
1.1 These test m
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