Crystalline properties of poly(L-lactic acid) composites filled with nanometer calcium carbonate

Ji Zhao Liang, Lin Zhou, Chak Yin Tang, Chi Pong Tsui

Research output: Journal article publicationJournal articleAcademic researchpeer-review

62 Citations (Scopus)

Abstract

The poly(L-lactic acid) (PLLA) filled with nanometer calcium carbonate (nano-CaCO3) composites were prepared by means of a twin-screw extruder in the present paper. The nano-CaCO3surface was treated with stearate. The crystalline properties of PLLA/nano-CaCO3composites were measured using a differential scanning calorimeter, to identify the influence of the nanometer particle content on the crystalline properties. The results showed that the crystallization onset temperature, crystallization temperature and crystallization end temperature as well as the crystalline degree of the composites were obvious higher than those of the unfilled PLLA resin when the particle weight fraction (φf) was 1%, then they varied slightly. While the crystallization temperature interval decreased slightly. The improvement of crystallinity degree might be attributed to the heterogeneous nucleation of the nano-CaCO3in the matrix.
Original languageEnglish
Pages (from-to)1646-1650
Number of pages5
JournalComposites Part B: Engineering
Volume45
Issue number1
DOIs
Publication statusPublished - 1 Feb 2013

Keywords

  • A. Polymer-matrix composites
  • B. Physical properties
  • D. Thermal analysis

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Industrial and Manufacturing Engineering
  • Mechanical Engineering

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