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

作　　者：朱能贵 李胜男 曾祥补 沈超 蒋团辉[1,2] 龚维 何力[2] 黄安荣[1] ZHU Nenggui;LI Shengnan;ZENG Xiangbu;SHEN Chao;JIANG Tuanhui;GONG Wei;HE Li;HUANG Anrong(National Engineering Research Center for Compounding and Modification of Polymer Materials,Guiyang 550022,China;College of Materials and Metallurgy,Guizhou University,Guiyang 550025,China)

机构地区：[1]国家复合改性聚合物材料工程技术研究中心,贵阳550022 [2]贵州大学材料与冶金学院,贵阳550025

出　　处：《复合材料学报》2024年第3期1281-1289,共9页Acta Materiae Compositae Sinica

基　　金：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)。

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84.52μm,泡孔密度为2.45×10^(5) cells/cm^(3)。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。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 modified with different sub structure coupling agents were studied using DSC,SEM and other characterization techniques.The results show that after modifying BF with different molecular structure coupling agents,the crystallization and rheological properties of the composite improve,the crystallinity increase,and the melt viscoelasticity improve.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 2.45×10^(5) cells/cm^(3).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 are33.4 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 

分 类 号：TB332[一般工业技术—材料科学与工程]