Largely improved toughness of polypropylene/long glass fiber composites by 尾-modification and annealing

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• 作者：Chengzhen Geng ; Juanjuan Su ; Caiyi Zhou ; Hongwei Bai ; Guanghui Yang ; Qiang Fu ; ^{qiangfu@scu.edu.cn" class="auth_mail}
• 关键词：A. Glass fibers ; A. Polymer&ndash ; matrix composites (PMCs) ; B. Fracture toughness ; B. Mechanical properties ; E. Annealing
• 刊名：Composites Science and Technology
• 出版年：23 May 2014
• 年：2014
• 卷：96
• 期：Complete
• 页码：56-62
• 全文大小：2112 K

文摘

尾-Modification and annealing were adopted to improve the impact strength of long glass fiber reinforced (LFPP) composites. It was found that either 尾-modification or annealing is an efficient way to toughen LFPP composites, and largely enhanced impact toughness can be achieved via simultaneously using 尾-modification and annealing, particularly for the toughness at low temperatures (−40 °C to −20 °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 尾-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 尾-modification and annealing. The possible structural origins for the higher extent of matrix plastic deformation are also discussed.