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Prediction of diallyl phthalate molding performance from laboratory tests I. Characterization and quality control of diallyl phthalate compounds
Author(s) -
Slysh Roman,
Hettinger Arthur C.,
Guyler Karl E.
Publication year - 1974
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760140404
Subject(s) - curing (chemistry) , materials science , differential scanning calorimetry , composite material , isothermal process , thermodynamics , physics
Abstract The purpose of this study was two‐fold: To determine the relationship between the composition and curing characteristics of glass‐reinforced diallyl phthalate (DAP) compounds and their molding performance. To develop quality control tests in order to assure their satisfactory processing.DAP compounds were analyzed with regard to composition, flow, curing characteristics, and heat stability. Tests involving “Spiral of Archimedes” and differential scanning calorimetry (DSC) were used to determine the flow and curing characteristics, respectively. A Brabender torque rheometer was employed to measure both flow and curing properties of DAP. The results obtained indicate that curing properties are of major importance in controlling the DAP processing. Good correlation was observed between the Brabender processing time, the onset curing temperature as measured by DSC, and the molding performance. A computer program was developed capable of calculating the kinetic parameters from the dynamic DSC scan of uncured DAP compounds. The curing data obtained from this method agree with those determined by isothermal DSC. A method based on the penetration of a hot metallic cone has been developed to measure rapidly the percent cure of molded DAP parts. The above mentioned techniques are recommended for the quality control of DAP molding compounds.