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Double-yielding behavior in injection-molded polycarbonate/high-density polyethylene/ethylene–vinyl acetate copolymer blends

✍ Scribed by Ji-Lin Pan; Zhong-Ming Li

Publisher: John Wiley and Sons
Year: 2008
Tongue: English
Weight: 700 KB
Volume: 108
Category: Article
ISSN: 0021-8995
DOI: 10.1002/app.27569

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✦ Synopsis

Abstract

A uniaxial tensile test was performed for polycarbonate (PC)/high‐density polyethylene (HDPE)/ethylene–vinyl acetate copolymer (EVA) blends with a fixed EVA content but various PC contents. The double‐yielding phenomenon and its composition dependence, as observed in the PC/HDPE blend, were again detected. EVA did not serve as a successful compatibilizer of PC and HDPE in the PC/HDPE/EVA blend. The incorporation of EVA resulted in a larger size and a more irregular shape of the PC fibers, as indicated in the scanning electron microscope observations; this, consequently, produced a higher serious stress concentration in the blend. This more complicated and instable morphology produced different double‐yielding behaviors in the PC/HDPE/EVA blends compared with the binary one. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008

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