含两亲性PEO-b-PBA增容剂的吸水膨胀橡胶的制备及性能

以天然橡胶为基体，微米级交联聚丙烯酸钠为高吸水性树脂，两亲性嵌段共聚物聚氧化乙烯-b-聚丙烯酸丁酯(PEO-b-PBA)为增容剂，聚乙二醇为吸水促进荆，制备了嵌段共聚物增容型吸水膨胀橡胶。通过扫描电子显微镜观察了其微观相态结构，适量加入两亲性嵌段共聚物PEO-b-PBA可以改善CSP树脂与NR的相容性。并研究了质量吸水率，体积膨胀率以及吸水速率与各组分含量之间的关系，对体系的力学性能进行了研究，对吸水树脂的主体吸水作用及嵌段共聚物的增容作用进行了探讨。

PREPARATION AND PROPERTIES OF A WATER-SWELLABLE RUBBER COMPATIBILIZED BY AMPHIPHILIC BLOCK POLYMER PEO-b-PBA

A water-swellable rubber has been prepared by blending with naturerubber(NR) as matrix, cross-linked sodium polyacrylate(CSP) as high-absorbent water resin the amphiphilic block copolymer poly(ethylene oxide)-b-poly(butylacrylate)(PEO-b-PBA) as compatibilizer and the poly(ethylene glycol)(PEG) as absorbent accelerant. The preparation process was described. The microphase structure of WSR was characterized by SEM photograph. The dependence of the degree of the water-absorbing and the water-swelling, the water-absorbing and water-swelling rate on CSP, and PEO-b-PBA contents was investigated. The mechanical properties of WSR was also investigated. The results show that the adding of PEO-b-PBA improves the compatibility of the WSR. The compatibilizing mechanism of PEO-b-PBA on WSR was studied.