不同分子结构偶联剂改性玄武岩对玄武岩/聚丙烯复合材料发泡行为与性能的影响
Effect of basalt modified by coupling agents with different molecular structures on foaming behavior and properties of basalt/polypropylene composites
朱能贵 1李胜男 2曾祥补 1沈超 2蒋团辉 1龚维 3何力 3黄安荣2
作者信息
- 1. 国家复合改性聚合物材料工程技术研究中心,贵阳 550022;贵州大学 材料与冶金学院,贵阳 550025
- 2. 国家复合改性聚合物材料工程技术研究中心,贵阳 550022
- 3. 贵州大学 材料与冶金学院,贵阳 550025
- 折叠
摘要
以不同分子结构的偶联剂为改性剂、以玄武岩纤维(BF)为增强相、以聚丙烯(PP)为基体,采用化学发泡二次开模工艺制备了BF/PP发泡复合材料,通过DSC、SEM等表征技术,研究了不同分子结构偶联剂改性BF时,BF/PP发泡复合材料的热性能、流变性能、发泡行为及力学性能.结果表明,通过不同分子结构偶联剂改性BF后,复合材料的结晶性能和流变性能得到改善,结晶度增加,熔体粘弹性变好.KH-550改性BF时,BF/PP发泡复合材料的发泡质量最好,此时泡孔尺寸为84.52 μm,泡孔密度为2.45×105 cells/cm3.BF被偶联剂改性后,发泡复合材料的弯曲强度、弯曲模量和拉伸强度相对于BF未改性时均有所提高;用KH-792改性BF时,弯曲强度、弯曲模量和拉伸强度最大,最大值分别为 33.4 MPa、1919 MPa和 21.4 MPa.本文将为BF/PP发泡复合材料的研发和工业化应用提供一定的理论参考.
Abstract
In this paper,basalt fiber(BF)was used as reinforcement phase and polypropylene(PP)as the matrix,BF/PP foam composites were prepared using a chemical foaming secondary mold opening process.The thermal properties,rheological properties,foaming behavior and mechanical properties of BF/PP foam composites modi-fied with different sub structure coupling agents were studied using DSC,SEM and other characterization tech-niques.The results show that after modifying BF with different molecular structure coupling agents,the crystalliza-tion and rheological properties of the composite improve,the crystallinity increase,and the melt viscoelasticity im-prove.When KH-550 is used to modify BF,the foaming quality of BF/PP foamed composites is the best,with a foam cell size of 84.52 μm.Cell density is 2.45×105 cells/cm3.After BF is modified by coupling agent,the flexural strength,flexural modulus,and tensile strength of the foam composite are improved compared to those of the unmodified BF;When modifying BF with KH-792,the maximum flexural strength,flexural modulus,and tensile strength are 33.4 MPa,1919 MPa,and 21.4 MPa,respectively.This study provides a theoretical reference for the development and industrial application of BF/PP foam composite materials.
关键词
偶联剂/聚丙烯/玄武岩纤维/发泡行为/力学性能Key words
coupling agent/polypropylene/basalt fiber/foaming behavior/mechanical property引用本文复制引用
基金项目
&&(黔科合平台人才-GCC[2022]045)
&&(黔科合平台人才-GCC[2022]043)
国家自然科学基金(51863003)
出版年
2024
NETL
NSTL
万方数据