溴化丁基橡胶/酚醛硫化树脂复合胶乳的制备与硫化

Preparation and cure of BIIR/phenolic resin vulcanizing agent composite latex

通过溶液乳化法制备了固含量为9.3%的溴化丁基橡胶/酚醛硫化树脂复合胶乳。以海藻酸钠为膏化剂对复合胶乳进行了膏化浓缩,研究了膏化剂用量对膏化时间、胶乳固含量和胶乳粒径的影响,结果表明膏化浓缩胶乳粒径较大,膏化周期较长,一般需半个月左右才能得到实用的浓缩胶乳。采用扫描电镜观察了复合胶乳干胶膜的断面形貌,发现大粒径的膏化胶乳成膜后胶粒间可以较好地融合。通过涂布、烘干和硫化等工艺制备了厚度为0.60mm的复合胶乳硫化膜片,并测试了硫化膜片的力学性能和H2渗透性能,结果表明硫化膜片的力学性能较好,其H2渗透率较低,为天然橡胶的9.64%、氯丁橡胶的71.3%。

The bromobutyl rubber/phenolic sulfuration resin composite latex with 9.3% solid content was prepared by the method of dissolution and emulsification,and the composite latex was concentrated by the creaming method,with sodium alginate as creaming reagent. The effect of dosage of creaming reagent on creaming time,latex solid content and average particle size was studied,and it was found that the composite latex particle size was too large,and the concentration period was too long,about 15 days. The dry rubbe...