增强剂尺寸效应对聚酰胺6发泡复合材料性能的影响
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1.国家复合改性聚合物材料工程技术研究中心,贵州 贵阳 550022;2.贵州省材料技术创新基地,贵州 贵阳 550022

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贵州省科研机构服务企业行动计划(黔科服企[2018]4010号);贵阳市白云区科技计划(白科合同[2020]36号)


Dimension Effect of Reinforcement on Properties of PA6 Foam Composites
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    摘要:

    采用化学发泡注塑成型技术制备了PA6发泡复合材料,分别以玻璃纤维、滑石粉以及玻纤/滑石粉为增强剂,探究了玻纤长度及含量、滑石粉粒径及含量、玻纤/滑石粉对材料力学性能、流变特性、发泡行为、耐热性能和密度的影响。结果表明:玻璃纤维能有效提高材料的力学性能、耐热性能,改善流变性能,进而增强其可发性,其中长度为3mm的玻纤,最有利于提升复合材料各方面性能,但PA6/GF复合材料密度过大,不利于轻量化;滑石粉虽然对复合材料各项性能的改善有限,但PA6/talc复合材料密度较小,有利于轻量化; GF/Talc复合体的各组分之间能互补协同,克服了单一组分填料的缺点,尤其是当PA6/GF/Talc的质量配比为70/20/10时,复合材料获得较高强度的同时兼具轻量化,综合性能良好。

    Abstract:

    PA6 foam composites were prepared by chemical foaming injection molding using glass fiber, talc powder and glass GF/talc composite particles as reinforcement respectively. The effects of glass fiber length and content, talc particle size and content, and glass fiber/talc composite particles on mechanical properties, rheological properties and foaming behavior of the composites were investigated. The results showed that glass fiber can effectively improve the mechanical properties, heat resistance and rheological properties of the material enhancing its foaming ability. The glass fiber with a length of 3 mm is the most beneficial to improve the performance of the PA6/GF composites, but the density of composites is too large, which is not conducive to lightweight. Although talc powder have limited improvement on the properties of composites, the density of PA6/talc composites is relatively small, which was conducive to lightweight. The components of composite particle GF / Talc can be complementary and synergistic, which overcome the shortcomings of single filler. Especially when the mass ratio of PA6/GF/Talc is 70/20/10, the composite material have high strength as well as lightweight showing good comprehensive performance.

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  • 收稿日期:2022-04-18
  • 最后修改日期:2022-07-07
  • 录用日期:2022-07-20
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