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The effect of crystallinity on the mechanical properties of plain woven carbon reinforced composites using polypropylene

机译：结晶度对聚丙烯平织碳增强复合材料力学性能的影响

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摘要

In this study, the effect of crystallinity on the mechanical properties of carbon fiber reinforced thermoplastics (CFRTP) was investigated. Plain woven carbon fiber was used as reinforcement. Polypropylene (PP) and maleic anhydride modified polypropylene (MAPP) were used as a matrix. The crystallinity of PP was controlled by using heat treatment after hot press molding of CFRTP. The range of crystallinity of PP and MAPP were from 26% to 40%. Flexural and izod impact tests of CFRTP were conducted based on Japanese Industrial Standard (JIS) K 7074 and K 7110, respectively. And double-notched test of CFRTP was conducted. Crystal morphologies of single carbon fiber added thermoplastics were observed by using polarization microscope. As a result, flexural strength and izod impact the value of CFRTP using PP increased with an increase of crystallinity. Flexural strength and izod impact value of CFRTP using MAPP almost did not change with an increase of crystallinity. But interfacial shear strength of CFRTP using MAPP increased with an increase of crystallinity. Crystallizations of PP and MAPP occurred around carbon fiber after heat treatment. Therefore, interfacial adhesion between fiber and resin increased with an increase of crystallinity.
机译：在这项研究中，研究了结晶度对碳纤维增强热塑性塑料（CFRTP）力学性能的影响。平纹碳纤维被用作增强材料。聚丙烯（PP）和马来酸酐改性的聚丙烯（MAPP）被用作基质。在CFRTP热压成型后，通过热处理控制PP的结晶度。 PP和MAPP的结晶度范围为26％至40％。 CFRTP的弯曲和伊佐德冲击试验分别基于日本工业标准（JIS）K 7074和K 7110进行。并进行了CFRTP双缺口测试。使用偏光显微镜观察了添加了单碳纤维的热塑性塑料的晶体形态。结果，随着结晶度的增加，弯曲强度和伊佐特对使用PP的CFRTP的值产生影响。使用MAPP的CFRTP的弯曲强度和伊佐德冲击值几乎不会随结晶度的增加而变化。但是使用MAPP的CFRTP的界面剪切强度随结晶度的增加而增加。热处理后，PP和MAPP的结晶在碳纤维周围发生。因此，纤维和树脂之间的界面粘合性随结晶度的增加而增加。

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