CAJ | 학술논문

由60Coγ射线引发或化学引发剂(K2S2O8)引发的乳液共聚法,制备了以丙烯酸或衣康酸为交联单体的羧基交联型丙烯酸酯橡胶(ACM).用红外光谱(FT-IR)表征了产物分子结构,用非水滴定方法分析了产物的酸值,用凝胶渗透色谱(GPC)测定了聚合物分子量和分子量多分散系数.用硫化仪分析、凝胶含量测定、机械性能测试和动态力学性能分析研究了交联单体的种类和用量对橡胶的硫化和性能的影响.结果表明,在相同的配方条件下,同化学法制备的聚合物相比,辐射法制备的聚合物的酸值较低,分子量较高,分子量多分散系数较小.以衣康酸为交联单体的ACM的硫化特性和机械性能好于以丙烯酸为交联单体的ACM.对于以衣康酸为交联单体的ACM,辐射法制备的橡胶比化学法制备的橡胶拥有更好的硫化特性、更高的凝胶含量和更优异的机械性能.
유60Coγ사선인발혹화학인발제(K2S2O8)인발적유액공취법,제비료이병희산혹의강산위교련단체적최기교련형병희산지상효(ACM).용홍외광보(FT-IR)표정료산물분자결구,용비수적정방법분석료산물적산치,용응효삼투색보(GPC)측정료취합물분자량화분자량다분산계수.용류화의분석、응효함량측정、궤계성능측시화동태역학성능분석연구료교련단체적충류화용량대상효적류화화성능적영향.결과표명,재상동적배방조건하,동화학법제비적취합물상비,복사법제비적취합물적산치교저,분자량교고,분자량다분산계수교소.이의강산위교련단체적ACM적류화특성화궤계성능호우이병희산위교련단체적ACM.대우이의강산위교련단체적ACM,복사법제비적상효비화학법제비적상효옹유경호적류화특성、경고적응효함량화경우이적궤계성능.
Acrylic rubbers (ACM) carboxylated by acrylic acid or itaconic acid were prepared by 60Co γ-ray or chemical-initiator (K2S2O8) induced emulsion copolymerization. The polymers were characterized by Fourier transform infrared spectroscopy (FT-IR). Acid value, molecular weight and polydispersity index (PDI) of the polymers were determined by non-aqueous titration method and gel permeation chromatography (GPC), respectively. Vulcanization and mechanical properties of the filled ACM were studied by rheometric measurement, gel fraction analysis,mechanical property tests and dynamic mechanical thermal analysis (DMTA). The results show that the ACMs prepared by γ-ray irradiation have lower acid value, higher molecular weight and narrower PDI than chemically prepared ACMs of the same composition. The itaconic acid carboxylated ACM has better cure characteristics and mechanical properties than the acrylic acid carboxylated ACM. The itaconic acid carboxylated ACM prepared by γ-ray irradiation has higher gel fraction and better cure characteristics as well as mechanical properties than that prepared by chemical method.