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Title: Preparation and characterization of reactive blends of poly(lactic acid), poly(ethylene-co-vinyl alcohol), and poly(ethylene-co-glycidyl methacrylate)

The ternary blends of poly(lactic acid) (PLA), poly(ethylene-co-vinyl alcohol) (EVOH), and poly(ethylene-co-glycidyl methacrylate) (EGMA) were prepared. The role of EGMA as a compatibilizer was evaluated. The weight ratio of PLA:EVOH was 80:20 and the EGMA loadings were varied from 5-20 phr. The blends were characterized as follows: thermal properties by differential scanning calorimetry, morphology by scanning electron microscopy, and mechanical properties by pendulum impact tester, and universal testing machine. The glass transition temperature of PLA blends did not change much when compared with that of PLA. The blends of PLA/EGMA and EVOH/EGMA showed EGMA dispersed droplets where the latter led to poor impact properties. However, the tensile elongation at break and tensile toughness substantially increased upon addition of EGMA to blends of PLA and EVOH. It was noted in tensile test samples that both PLA and EVOH domains fibrillated significantly to produce toughness.
Authors:
;  [1] ;  [2]
  1. Chulalongkorn University, Petroleum and Petrochemical College - Bangkok (Thailand)
  2. The University of Akron, Department of Polymer Engineering, Ohio (United States)
Publication Date:
OSTI Identifier:
22391849
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1664; Journal Issue: 1; Conference: PPS-30: 30. International Conference of the Polymer Processing Society, Cleveland, OH (United States), 6-12 Jun 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALCOHOLS; CALORIMETRY; COMPARATIVE EVALUATIONS; DROPLETS; ELONGATION; GLASS; IMPACT TESTS; LACTIC ACID; LOADING; MECHANICAL PROPERTIES; MECHANICAL VIBRATIONS; METHACRYLATES; MORPHOLOGY; POLYETHYLENES; SCANNING ELECTRON MICROSCOPY; TIME MEASUREMENT; TRANSITION TEMPERATURE