Title: CONTACT ANGLE OF EPOXY RESIN MEASURED BY CAPILLARY IMPREGNATION AND THE WILHELMY TECHNIQUE
Page Range: p.251-259
Author(s): Min Li; Zuo Guang Zhang; Zhi Jie Sun
File size: 114K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 14
Issue No: No. 3
Abstract
The contact angle of an epoxy resin, as a widely used polymeric matrix, was studied by impregnation in single glass capillaries at the manufacturing temperature of the composites. In order to obtain the net wicking mass for capillary experiments, the meniscus force at the bottom of the glass tube was investigated using the Wilhelmy technique with glass sticks of various diameters. Results indicated that the contact angles resulting from equilibrium using both capillary impregnation and the Wilhelmy experiment are consistent, which proved the reliability of the practical evaluation of the effect of the meniscus on the penetration mass. The equilibrium contact angle of epoxy resin for the Wilhelmy method was 59 degrees and 61 degrees for the capillary impregnation of glass tubes. Therefore, the contact angle of epoxy resin is approximately 60 degrees a the test temperature of 80 degrees. 19 refs.
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