Extensional processing behavior of thermoplastics reinforced with a melt processable glass

Autor: R. T. Young, M. A. McLeod, D. G. Baird
Rok vydání: 2000
Předmět:
Zdroj: Polymer Composites. 21:900-917
ISSN: 1548-0569
0272-8397
DOI: 10.1002/pc.10244
Popis: This work was concerned with investigating the processing behavior of thermoplastics reinforced with a melt processable phosphate glass under extensional flows at temperatures used for forming and shaping operations. Injection molded blends consisting of polyetherimide (PEI) and polyphenylene sulfide (PPS) reinforced with 30-60 wt% phosphate glass were exposed to uniaxial and planar deformation at temperatures above the T g of the phosphate glass (234°C) to evaluate the effects on the morphology and mechanical properties of the composites. Tensile testing at elevated temperatures (250-300°C) was used to evaluate the forming behavior and ascertain the conditions most suited for the deformation of the composite blends. A temperature approximately 35°C above the T g of the P-glass was found to offer conditions most conducive to the deformation of the PEI/P-glass blends. The phosphate glass reinforced PEI was found to offer greater retention of properties and smoother surfaces than an E-glass filled material when exposed to shearfree deformation similar to that seen in a process such as thermoforming. For PPS based composites, the application of planar shearfree deformation near the melting point of the PPS (≅ 283°C) resulted in the elongation of the phosphate glass phase which served to enhance the stiffness of the composite blends along the principal deformation direction.
Databáze: OpenAIRE
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