ADP/A-SEP复配体系对EVA/MPE线缆复合材料的改性研究  

Modification of ADP/A-SEP Complex on EVA/MPE Cable Composites

作　　者：常子衡 李薇 刘志成 陈彪 孟强 杜敬亮 杜永刚 CHANG Ziheng;LI Wei;LIU Zhicheng;CHEN Biao;MENG Qiang;DU Jingliang;DU Yonggang(School of Materials Science and Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Hebei Shanghua Plastic Technology Co.,Ltd.,Shijiazhuang 051130,China;Hebei Key Laboratory of Advanced Materials for Transportation Engineering and Environment,Shijiazhuang 050043,China)

机构地区：[1]石家庄铁道大学材料科学与工程学院,河北石家庄050043 [2]河北尚华塑料科技有限公司,河北石家庄051130 [3]河北省交通工程与环境协同发展新材料重点实验室,河北石家庄050043

出　　处：《塑料工业》2024年第1期147-153,共7页China Plastics Industry

基　　金：中央引导地方科技发展资金项目——河北省省级科技计划资助(206Z1202G);河北省自然科学基金项目(B2019210221)。

摘　　要：采用乙烯基三乙氧基硅烷(A151)对海泡石(SEP)进行表面处理制得A-SEP,并同二乙基次磷酸铝(ADP)复配用作乙烯-醋酸乙烯共聚物(EVA)/茂金属聚乙烯(MPE)线缆复合材料的阻燃改性剂。考察了ADP/A-SEP复配体系组成对EVA/MPE线缆复合材料拉伸性能、阻燃性能和加工流动性的影响。结果表明,ADP虽能明显改善EVA/MPE线缆复合材料的阻燃性能,但对拉伸性能负面影响较大。A-SEP同ADP具有较好的协效阻燃效果,且能够同时改善EVA/MPE线缆复合材料的拉伸性能。当ADP添加量为25%、A-SEP添加量为3%时,EVA/MPE线缆复合材料的拉伸强度与断裂伸长率分别为11.43 MPa和689%;极限氧指数(LOI)达到32%,初始热降解温度和残炭率分别为352.89℃和5.75%,体积电阻率为2.63×10^(13)Ω·cm。此外A-SEP添加量不超过3%时,其对EVA/MPE/线缆复合材料的加工流动性影响不大。A-SEP was prepared by surface treatment of sepiolite(SEP)with vinyltriethoxysilane(A151).The complex of A-SEP and aluminum diethylhosphinate(ADP)was used as flame retardant for ethylene-vinyl acetate copolymer(EVA)/metallocene polyethylene(MPE)cable composites.The effects of the composition of ADP/A-SEP on the tensile properties,flame retardancy,and processability of EVA/MPE cable composites were determined.The results show that ADP can significantly improve the flame retardancy of EVA/MPE cable composites,but it has obvious negative impact on the tensile properties.A-SEP has a good synergistic flame retardancy with ADP and can improve the tensile properties of EVA/MPE cable composites at the same time.The tensile strength and elongation at break of EVA/MPE cable composites are 11.43 MPa and 689%respectively.The limiting oxygen index(LOI)reaches 32%,and the initial thermal degradation temperature and carbon residue rate are 352.89℃and 5.75%,respectively,and the volume resistivity is 2.63×10^(3)Ω·cm.In addition,when the addition of A-SEP is less than 3%,it has little effect on the processing fluidity of EVA/MPE/cable composites.

关 键 词：乙烯-醋酸乙烯共聚物 二乙基次磷酸铝 海泡石 阻燃性能 拉伸性能 加工性能 

分 类 号：TB332[一般工业技术—材料科学与工程] TM24[电气工程—电工理论与新技术]