摘要
为了获得高韧性硅灰石填充β-聚丙烯基(W/β-PP)复合材料,采用负载庚二酸钙的硅灰石(β-W)填充聚丙烯(PP)制备。研究了W/β-PP复合材料中β-W的β-成核作用,并对比了硅灰石和β-W填充PP基复合材料的力学性能。结果表明:硅灰石填充聚丙烯(W/PP)复合材料主要形成α-晶,而β-W对PP结晶具有强的β-成核作用;W/PP复合材料的缺口冲击强度低于β-聚丙烯(β-PP),硅灰石与PP的β-晶之间存在协同增韧作用,导致W/β-PP复合材料的缺口冲击强度高于β-PP;随着β-W含量的增加,W/β-PP复合材料的缺口冲击强度先增大后减小,在其质量分数为5%时达到最大值;同时硅灰石的增强作用可以提高β-PP的刚性。
In order to obtain wollastonite filledβ-polypropylene（W/β-PP）composites with high toughness,calcium pimelate-supported wollasonite（β-W）was used to fill polypropylene（PP）.Theβ-nucleating effect ofβ-W in W/β-PP composites was investigated,and mechanical properties of wollastonite andβ-W filled PP composites were compared.The results show that wollastonite filled polypropylene（W/PP）composites mainly formα-crystal,whileβ-W has strongβ-nucleating effect for PP crystallization.The notched impact strength of W/PP composites is lower than that ofβ-polypropylene（β-PP）,and the synergistic effect of toughening between wollastonite andβ-crystal results in higher notched impact strength of W/β-PP composites compare withβ-PP.The notched impact strength of W/β-PP composites increase firstly and then decrease with the increase of theβ-W content and reaches to the maximum at the mass fraction of 5%.In addition,the reinforcement of wollastonite enhances the stiffness of β-PP.
作者
丁茜
章自寿
罗建新
麦堪成
DING Qian ZHANG Zishou LUO Jianxin MAI Kancheng(Department of Materials and Chemical Engineering, Hunan Institute of Technology, Hengyang 421002, China Key Laboratory of High Performance Polymer Based Composites of Guangdong Province, Key Laboratory of Polymeric Composites and Functional Materials of Ministry of Education, Materials Science Institute, School of Chemistry and Chemical Engineering, Sun Yat sen University, Guangzhou 510275, China)
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2016年第9期2061-2066,共6页
Acta Materiae Compositae Sinica
基金
国家自然科学基金(51173208
51373202)
关键词
硅灰石
β-聚丙烯
β-成核作用
增强
增韧
wollastonite
β-polypropylene
β-nucleating effect
reinforcement
toughening
