Possibility of disentanglement process of condensation polymer by transesterification proof by growth rate of spherulite

Research output: Contribution to conferencePaper

Abstract

In order to proof of the possibility of disentanglement process of condensation polymers via transesterificartion, we measured the growth rate of spherulite (G) of PLLA as a function of melt annealing time (Δt) before isothermal crystallization. We prepared three PLLA samples by means of reaction induced crystallization of oligomers during polymerization. For the sample with unclear crystal habit, we found that G was almost constant at Δt<30 min, and then monotonially decreased with increasing Δt. From GPC measurements, we confirmed that molecular weight did not change and molecular weight distribution became broad. This implies that condensation polymers within the melt disentangle via transesterification.

Original languageEnglish
Number of pages1
Publication statusPublished - Oct 18 2006
Event55th SPSJ Annual Meeting - Nagoya, Japan
Duration: May 24 2006May 26 2006

Other

Other55th SPSJ Annual Meeting
CountryJapan
CityNagoya
Period5/24/065/26/06

Keywords

  • Crystallization
  • Entanglement
  • Growth rate
  • PLLA/transesterification

ASJC Scopus subject areas

  • Engineering(all)

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