TRIREFRINGENCE TECHNIQUE FOR THE ANALYSIS OF BIAXIAL DEFORMATION: POLY(ETHYLENE TEREPHTHALATE) AND ISOTACTIC POLYPROPYLENE.

Jia Y. Guan, Ravi F. Saraf, Roger S. Porter

Research output: Contribution to journalConference article

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Abstract

For amorphous poly(ethylene terephthalate) (PET), uniaxial deformation induces both chain orientation and crystallization. Conversely, the crystallinity drops on draw of highly crystalline (30-50%) PET. In contrast, crystals of isotactic polypropylene (i-PP) uniaxially drawn above glass transition (T//g) orient, but with no significant change in crystallinity. A comparison between i-PP and PET is made to distinguish the effect of biaxial deformation on pre-crystallized polymer (i-PP) and strain crystallizable polymer (PET). Trirefringence is used to characterize the orientation inducead by the deformation field on PET and i-PP.

Original languageEnglish (US)
Pages (from-to)586-588
Number of pages3
JournalAnnual Technical Conference - Society of Plastics Engineers
StatePublished - Dec 1 1986

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ASJC Scopus subject areas

  • Engineering(all)

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