SEBS-g-MAH的制备及SEBS／PP阻燃材料的性能影响

Preparation of SEBS-g-MAH and SEBS/PP the Performance Impact of Fire-Retardant Materials

制备了高接枝率的SEBS-g-MAH,用FTIR表征了接枝产物;同时研究了SEBS-g-MAH对SEBS/PP复合材料阻燃、力学和熔融流动等性能的影响,并用SEM分析其形貌特性。结果表明:随着马来酸酐量的增加、共混时间的延长和转速的增加,产物的接枝率呈先增加后减少;而随着DCP用量增加,产物的接枝率呈先减少后增加的趋势;当SEBS/MAH/DCP质量比为100/3/0.4,温度为175℃,转速为40 r/min,反应时间为9 min时,接枝率为3.18%。SEBSg-MAH的加入,使阻燃剂分散性更好,复合材料的拉伸强度从5.65 MPa提高到7.38 MPa,氧指数从28提高到30。

High stem grafting rate SEBS-g-MAH had been prepared in this article. It was confirmed that MAH has grafted on SEBS by means of FTIR. Simultaneously the influence of SEBS-g-MAH to SEBS/PP composites retardant, mechanical and melt flow properties has been discussed,and analyzes its appearance characteristic with SEM. The results showed that： with the increase of the amount of maleic anhydride,increasing mixing time and speed of the extension, grafting product increased first decrease;and with the increase of DCP,graft product was first decrease after increasing trend;when SEBS/MAH/DCP = 100/ 3/0.2（ mass ratio） , the temperature of 175 ℃ , speed 40 r/min, the reaction time was 9 min that the stem grafting rate was 3. 18%. SEBS-g-MAH joined, causes the burning inhibitor dispersivity to be better, the compound materials longitudinal strength enhanceed from 5.65 MPa to 7.38 MPa,the oxygen index from 28 enhanceed to 30.