4.7 Article

The hydrolytic effect of moisture and hygrothermal aging on poly(butylene succinate)/organo-montmorillonite nanocomposites

Journal

POLYMER DEGRADATION AND STABILITY
Volume 96, Issue 7, Pages 1194-1203

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2011.04.017

Keywords

Hydrolysis; Moisture absorption; Hygrothermal aging; Poly(butylene succinate); Nanocomposites; Biodegradable

Funding

  1. USM Research University [1001.PBAHAN.814016]
  2. USM [1001.PBAHAN.8021011]

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The study of hydrolysis on biodegradable poly(butylene succinate) (PBS) is essential to predict the materials properties in a humid environment. In this study, PBS nanocomposites were exposed to different conditions of relative humidity (RH) and temperature. The moisture uptake increased with organo-montmorillonite (OMMT) loading and the RH of the testing environment. The exposure of PBS and the nanocomposites to a humid environment caused changes in the mechanical properties. The hydrolytic degradation becomes more pronounced upon hygrothermal aging at high temperature, whereby premature failure occurred. PBS nanocomposites were found to exhibit a better hydrolytic stability than neat PBS. The degradation was evaluated through Fourier transform infrared (FTIR) spectroscopy and gel permeation chromatography (GPC). A drastic reduction in the molecular weight of PBS has revealed the occurrence of degradation after exposure to moisture and heat. This has led to an alteration of the thermal behavior as investigated using differential scanning calorimetry (DSC). (C) 2011 Elsevier Ltd. All rights reserved.

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