Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 96, Issue -, Pages 56-62Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2014.03.010
Keywords
Glass fibers; Polymer matrix composites (PMCs); Fracture toughness; Mechanical properties; Annealing
Categories
Funding
- National Natural Science Foundation of China [51173112, 51121001]
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beta-Modification and annealing were adopted to improve the impact strength of long glass fiber reinforced (LFPP) composites. It was found that either beta-modification or annealing is an efficient way to toughen LFPP composites, and largely enhanced impact toughness can be achieved via simultaneously using beta-modification and annealing, particularly for the toughness at low temperatures (-40 degrees C to -20 degrees C). Meanwhile, the tensile strength and Young's modulus of the composites could be maintained. Various characterizations were used to understand the microstructure changes and toughening mechanism after beta-modification and annealing. The results show that the higher extent of the matrix plastic deformation could be the main reason for the enhanced toughness as induced by beta-modification and annealing. The possible structural origins for the higher extent of matrix plastic deformation are also discussed. (C) 2014 Elsevier Ltd. All rights reserved.
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