Crystallization of shape memory polymer blends

Olivier B. Arnoult, Patrick T. Mather

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Scopus citations

Abstract

Shape Memory Polymers (SMP) blends are of particular interest because they are easily processible, commercially available and recyclable. In this paper we study blends of PVDF (semi-crystalline, Tg=-35 °C, T m=173 °C) and PVAc (amorphous, Tg=33 °C) which are miscible at all blending ratio (presence of a single Tg). Effects of composition as well as thermal histories on crystallization were investigated via differential scanning calorimetry (DSC), parallel plate rheology and polarizing optical microscopy (POM). For the first time, evidence for two distinct crystalline forms was observed in a blend with PVAc and PVDF crystallized for all blending ratios. Rheological measurements show that the rubber plateau of the blend decreases with lower PVDF content because of lower density of physical crosslinks. Surprisingly, in the case of 30:70 PVDF:PVAc the highest rubber plateau was achieved by isothermal crystallization at temperature close to, but above, the crystallization point measured by DSC Comparing rheological and optical results for crystallization kinetic, it can be inferred that PVDF crystallizes faster near a solid interface than in the bulk.

Original languageEnglish (US)
Title of host publicationSociety of Plastics Engineers Annual Technical Conference
Subtitle of host publicationPlastics Encounter at ANTEC 2007, Conference Proceedings
Pages839-844
Number of pages6
StatePublished - Sep 28 2007
EventSociety of Plastics Engineers Annual Technical Conference: Plastics Encounter at ANTEC 2007 - Cincinnati, OH, United States
Duration: May 6 2007May 11 2007

Publication series

NameAnnual Technical Conference - ANTEC, Conference Proceedings
Volume2

Other

OtherSociety of Plastics Engineers Annual Technical Conference: Plastics Encounter at ANTEC 2007
CountryUnited States
CityCincinnati, OH
Period5/6/075/11/07

Keywords

  • Blend
  • Crystallization
  • PVAc
  • PVDF
  • Shape memory polymer

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Polymers and Plastics

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    Arnoult, O. B., & Mather, P. T. (2007). Crystallization of shape memory polymer blends. In Society of Plastics Engineers Annual Technical Conference: Plastics Encounter at ANTEC 2007, Conference Proceedings (pp. 839-844). (Annual Technical Conference - ANTEC, Conference Proceedings; Vol. 2).