三元乙丙橡胶吸水膨胀橡胶性能的研究

Study on Properties of EPDM Water Swellable Rubber

研究白炭黑、石蜡油、吸水树脂和吸水助剂ZA用量对三元乙丙橡胶吸水膨胀橡胶性能的影响。结果表明:在使用石蜡油改善胶料加工性能时,需要加入20份以上的白炭黑,否则硫化胶难以吸水;过大的石蜡油用量会减慢硫化胶的吸水速率和减小饱和吸水率,石蜡油用量应不超过50份;吸水树脂用量小于30份时,硫化胶的吸水速率较慢和饱和吸水率较小,吸水树脂用量超过50份时,硫化胶的吸水速率较快,吸水树脂用量越大,硫化胶的饱和吸水率越大,但拉伸强度降低;加入吸水助剂ZA可以加快硫化胶的吸水速率,吸水助剂ZA用量越大,硫化胶的吸水速率越快,加入15份吸水助剂ZA可增大硫化胶的饱和吸水率,吸水助剂ZA用量超过15份后硫化胶的饱和吸水率变化很小。

The effects of the amount of silica,paraffin oil,water-absorbing resin and water-absorbing additive ZA on the properties of ethylene propylene rubber(EPDM)water swellable rubber were studied.The results showed that,when paraffin oil was used to improve the processing properties of the compound,it was necessary to add more than 20 phr of silica,otherwise the vulcanizate was difficult to absorb water.Excessive amount of paraffin oil would reduce the water absorption rate and saturated water absorption ratio of the vulcanizates,so the amount of paraffin oil should not exceed 50 phr.When the amount of water-absorbing resin was less than 30 phr,the water absorption rate and saturated water absorption ratio of the vulcanizates were reduced.When the amount of water-absorbing resin was more than 50 phr,the water absorption rate of the vulcanizates was improved.The higher the amount of water absorbent resin was,the larger the saturated water absorption ratio of the vulcanizate was,but the tensile strength was reduced at the same time.The addition of water absorbent additive ZA could speed up the water absorption rate of the vulcanizate.The higher the amount of water absorbent additive ZA was,the faster the water absorption rate of the vulcanizate was.The addition of 15 phr water absorbent additive ZA could improve the saturated water absorption rate of the vulcanizate,and when the amount of ZA exceeded 15 phr,the saturated water absorption ratio of the vulcanizate changed little.