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분쇄 폐타이어와 SBR 을 이용한 발포체의 가황거동 및 물성
서관호,임학상,임정철 한국고무학회 1997 엘라스토머 및 콤포지트 Vol.32 No.2
The effect of the ground rubber as filler on cure behavior and physical properties of SBR foam was studied in this research. We also studied how the amount and the particle size of the ground rubber affect them. As the ground rubber were added, the scorch time and the optimum cure time were shorter. It may be due to the migration of accelerators in the ground rubber into the SBR, we imagine. Adding the more ground rubber, however, obtaining the lower maximum torque. This is caused by the poor adhesive force between rubber surfaces as the ground rubber were added. When the same quantity of filler were added, 2G excelled CaCO₃ in tesile stress and elongation at break. Tensile fracture surfaces became rougher as the amount of the ground rubber increased as well as the particle size of the ground rubber was larger.
徐寬浩,金祐埴,池一勳 慶北大學校 1989 論文集 Vol.47 No.-
To decrease the blowing temperature of paste PVC, citric acid, boric acid, boric acid, 4,4'-oxybis(benzenesulfonyl hydrazide), and p-toluenesulfonyl hydrazide were mixtured in azodicarbonamide with warious weight ratios, respectively. Boric acid had not an important effect on the decreasing the decomposition temperature of azodicarbonamide. Citric acid had a good effect on the decomposition temperature of azodicarbonamide. But, when the citric acid was used as co-blowing agent, the cell of PVC foam was bad. 4,4'-oxybis(benzenesulfonyl hydrazide) and p-toluenesulfonyl hydrazide had a good effect on the decreasing the decomposition temperature of azodicarbonamide, and the cell of PVC foam was good. Moreover, when 4,4'-oxybis(benzenesulfonyl hydrazide) was used as co-blowing agent, the cell of PVC foam was excellent.
NBR 계 고무롤의 물성개질에 관한 연구(1) : NBR/PVC Blend Systems NBR/PVC 혼합계 고무
서관호,고영철,하현달,조을용 한국고무학회 1995 엘라스토머 및 콤포지트 Vol.30 No.3
To modify the NBR rubber roll which has poor abrasion and chemical resistance, NBR/PVC blends were prepared in various composition ratios. First of all, their miscibility and vulcanization characteristics were investigated. Their abrasion and chemical resistant properties and physical properties were also studied. DSC thermograms for NBR/PVC blends show only one Tg in the entire composition range, demonstrating a perfect miscibility. In the vulcanization characteristics tested by rheometer, maximum torque decreases as PVC contents increased. In the investigation of physical properties of NBR/PVC blends, hardness increases and elongation decreases along with the increasing contents of PVC. On the other hands, tensile strength increases with the increasing contents of PVC up to 11.1 wt. %, and then decreases with higher contents of PVC. While the abrasion resistance of NBR/PVC blends was similar to that of NBR itself, the chemical resistance of NBR/PVC blends was superior to that of NBR.