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中南大学学报(自然科学版)

Journal of Central South University

第50卷    第5期    总第297期    2019年5月

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文章编号:1672-7207(2019)05-1075-07
玻纤增强聚丙烯与尼龙66模内混合加工成型实验研究
符亮1,蒋炳炎1, 2,吴旺青1, 2,闵丽萍1

(1. 中南大学 高性能复杂制造国家重点实验室,湖南 长沙,410083;
2. 中南大学 新型特种纤维及其复合材料湖南省重点实验室,湖南 长沙,410083
)

摘 要: 为了解决纤维增强热塑性复合材料加工成型零件复杂程度与力学性能匹配的问题,提高不同热塑性基体纤维增强复合材料制件的力学强度,运用模内混合加工成型技术制备连续玻纤增强聚丙烯(PP)预制件与短玻纤增强尼龙66(PA66)平板实验件,采用单因素实验法研究熔体温度、预制件加热温度、模具温度和保压压力对实验件弯曲强度的影响规律。研究结果表明:界面温度和保压压力的提高有利于提高加工成型制件弯曲强度,其中预制件加热温度和熔体温度对制件弯曲强度影响最大,分别提高2.6倍和1.6倍,且呈线性增大关系;微观形貌显示混合界面出现PP与PA66树脂间融合共混区;模内混合加工成型工艺参数的优化提高了制件的力学性能,扩宽了轻量化材料的组合应用。

 

关键词: 模内混合加工成型;热塑性基体;弯曲强度;微观形貌

Experimental research on in-mold hybrid molding of glass fiber reinforced polypropylene and nylon66
FU Liang1, JIANG Bingyan1, 2, WU Wangqing1, 2, MIN Liping1

1. State Key Laboratory of High Performance Complex Manufacturing, Central South University,
Changsha 410083, China;
2. Hunan Key Laboratory of Advanced Fibers and Composites, Central South University, Changsha 410083, China

Abstract:To address the matching issue between complexity and mechanical properties of fiber reinforced thermoplastics part, improve the mechanical strength of fiber reinforced composite part with different thermoplastic matrixes, the flat test sample of pre-formed part with continuous fiber reinforced polypropylene(PP) and short fiber reinforced nylon66(PA66) were prepared by in-mold hybrid molding technology. The effects of melt temperature, heating temperature of pre-formed part, mold temperature and holding pressure on the bending strength were studied by single-factor experiment. The results show that the bending strength increases with the increase of interface temperature and holding pressure. The heating temperature of pre-formed part and melt temperature have the greatest impact on bending strength, and the bending strength increases by 2.6 and 1.6 times, respectively, showing a linear growth relationship.The fusion blending zone appears between hybrid interface of PP and PA66 resin.The mechanical strength is improved by optimization of in-mold hybrid molding process parameters and the combined use of lightweight materials is expanded.

 

Key words: in-mold hybrid molding; thermoplastic matrix; bending strength; microscopic morphology

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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