Effects of Accelerators on the Vulcanization Properties of Silica vs. Carbon Black Filled Natural Rubber Compounds

Abstract

초록: 화학적 구조가 다른 thiuram계 TMTD(tetramethyl thiuram disulfide), DPTT(dipenta-methylene thiuram tetrasulfide), thiazole계 MBT(2-mercapto benzothiazole), MBTS(2,2-dithiobis(benzo-thiazole)), sulfenamide계 CBS (n-cyclohexyl benzothiazyl-2-sulfenamide), NOBS(n-oxydiethylene benzo-thiazyl-2-sulfenamide), 아연이 포함된 thiuram계 ZDBC(zinc di-n-butyl-dithiocarbamate)를 사용하여 각각의 촉진제가 실리카와 카본블랙으로 충전된 천연 고무 복합소재의 가황 속도 및 가황 지수에 미치는 영향을 비교 평가하였다. 양 시스템에서 가황 속도는 thiuram계, thiazole계, sulfenamide계의 순서로 동일한 경향을 보였다. 각 촉진제에 대하여 실리카 컴파운드는 카본블랙 컴파운 드에 비해 t s2 , t 10 , t 90 에 도달하는 시간이 느리게 나타났으며 느린 가황 지수(CRI)를 나타내었다. Abstract: Thiuram (DPTT, TMTD), thiazole (MBT, MBTS), sulfenamide (CBS, NOBS), and zinc containing thiuram (dithiocarbamate) (ZDBC) type accelerators were added into silica and carbon black filled natural rubber (NR) compounds. Their effects on vulcanization time and rate were compared. The vulcanization rate of thiuram type accelerator added compounds showed the fastest rate, followed by thiazole and sulfenamide types. Silica filled natural rubber (NR) compounds showed a slower vulcanization time (t s2 , t 10 , t 90 ) and lower cure rate index (CRI) than carbon black filled ones upon each accelerator.

Optimization of Accelerator Mixing Ratio for EPDM Rubber Grommet to Improve Mountability Using Mixture Design

“…Here, we remark that the mechanical properties of rubber are considerably influenced by the choice of the vulcanization accelerator, and the vulcanization characteristics vary widely depending on the type and mixing ratio of the accelerator [11]. Moreover, natural rubber and synthetic rubber exhibit different reactions to the same accelerator, which may act as an ultra-rapid accelerator for the former and a retardant for the latter [12,13].…”

Interfacial Adhesion in Silica-Silane Filled NR Composites: A Short Review

“…Sulfenamide type accelerators on rate of sulfenamide-sulfur reaction [45] and scorch delay reaction in the NR & SBR compound [46] were studied. Vulcanization rate of silica/NR compounds and CB/NR compounds, which contain various accelerators were directly compared [1,35,40]. These accelerators consist of different chemical structure, i.e., thiuram type, TMTD (tetramethylthiuram disulfide) and DPTT (dipentamethylenethiuram tetrasulfide); thiazole type, MBT (2-mercaptobenzothiazole) and MBTS (2,2dithiobis(benzothiazole)); sulfenamide type, CBS (n-cyclohexylbenzothiazyl-2-sulfenamide) and NOBS (n-oxydiethylenebenzothiazyl-2-sulfenamide)]; and zinc ion containing thiuram type ZDBC (zinc di-n-butyldithiocarbamate)].…”

“…Compared with CB filled NR tire, it shows excellent performance such as improved fuel efficiency due to low rolling resistance, reduced braking distance due to slip resistance due to high tan delta, and improved traction in snow and wet conditions when driving a vehicle. Currently many vehicles use a green tire (silica filled tire) [1]. It is called green tire because it has green strength during silica composite processing.…”

Doğal Atık Malzemelerle Yeni NBR Bazlı Bileşiklerin Hazırlanması ve Karakterizasyonu

“…Literatür çalışmalarına bakıldığında cam küre, pirinç kabuğu, wollastonit, mika tozu, zamk, karbon siyahı, fosfat, nanokil, silika, kalsit, yüksek fırın baca tozu, rejenere kauçuk, odun külü ve nano kalsiyum karbonat v.b. gibi birbirlerinden farklı dolguların kauçuk bileşiklerine ilave edilerek kullanıldığı dikkat çekmektedir [5][6][7][8][9][10][11][12][13][14][15]. Bilim insanlarının farklı dolgular kullanarak bileşiklerin mekanik ve fiziksel özeliklerini geliştirme adına yaptıkları birçok çalışma vardır bunlardan bazıları şu şekildedir; Wang ve ark.…”