화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.36, No.2, 235-244, March, 2012
Export Citation
Thiazole계 가황촉진제가 실란/실리카 충전 천연고무 컴파운드의 가황 거동 및 기계적 물성에 미치는 영향
Thiazole Type Accelerator Effects on Silane/Silica Filled Natural Rubber Compound upon Vulcanization and Mechanical Properties
김성민, 김광제†
  • 동아타이어공업(주)
Sung Min Kim, and Kwang Jea Kim†
  • Dong Ah Tire & Rubber Co., Ltd., Gyeongnam 626-110, Korea
E-mail:
초록
본 연구에서는 thiazole 계 촉진제인 2-mercapto benzothiazole(MBT)의 첨가량을 변화시켜(0, 1, 2, 3, 4 phr) 실란/실리카로 충전된 천연고무 컴파운드에 첨가하여 가황속도, 물성, 고무-충전제간 상호작용계수(αF), 가교밀도 및탄젠트 델타(tanδ)에 미치는 영향을 비교 평가하였다. 촉진제의 첨가량이 증가할수록 ts2, t90 가황시간은 빨라졌고 가교 밀도 및 300% 모듈러스는 증가하였다. 인장강도와 신장률 또한 증가하였으나 3 phr에서는 더 이상의 증가가 없었다. 그리고 상온에서의 tanδ 값은 70 ℃에서보다 높은 값을 나타내었다. 촉진제의 함량변화는 천연고무-실란/실리카간 상호관계(αF)에 큰 영향을 미치지 않는 것으로 관찰되었다. 가황속도에 미치는 메카니즘을 고찰하였다.
A thiazole type accelerator MBT (2-mercapto benzothiazole) was added into silica filled natural rubber (NR) compound with various concentrations (0, 1, 2, 3, 4 phr). The effects of MBT on the cure rate, mechanical property, degree of rubber-filler interaction (αF), crosslinking density, and viscoelastic property (tanδ) were investigated. As accelerator concentration increased, the ts2 and t90 decreased and the crosslinking density and modulus at 300% elongation increased. The tensile strength and elongation increased up to 3 phr and no further increased at 4 phr. The tan δ value measured at room temperature was higher than that of the 70 ℃. The αF value was not affected by the addition of MBT. The mechanisms for the vulcanization rate were reviewed.
Keywords:2-mercapto benzothiazole(MBT);silica/natural rubber;cure rate;mechanical properties;vulcanization mechanism.
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