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Polymers and Polymer Composites

A novel approach for fabricating poly-l-lactide materials by onestep bulk polymerization

April 1, 2016 By: Zhiyuan Peng; Zhiping Li; Fan Zhang; Xiaochun Peng Research article

Title: A novel approach for fabricating poly-l-lactide materials by onestep bulk polymerization
Page Range: p.249-254
Author(s): Zhiyuan Peng; Zhiping Li; Fan Zhang; Xiaochun Peng
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 24
Issue No: No.4

Abstract
Poly-L-lactide (PLLA) is one of the most significant members of a group of bioabsorbable polymers. A new approach for fabricating PLLA material was investigated by one-step bulk polymerisation. The focus of this paper was on the effect of reaction temperature and reaction time on the weight-average molar mass, the polydispersity index (PDI), and the flexural strength and modulus. Gel permeation chromatography (GPC), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR) and mechanical properties measurements were used to characterise the products. It was found that the optimal reaction conditions were at 140 degC for 24 h, under which the highest (5.02 x 105 Da) and the lowest PDI (1.16) were reached. In addition this material had the highest flexural strength and modulus, 74.58 plus/minus 2.35 MPa and 1.62 plus/minus 0.14 GPa, respectively. 19 Refs.

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