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백남철,서원동 한국고무학회 1978 엘라스토머 및 콤포지트 Vol.13 No.2
The measurement of the infrared absorption spectrum of supporting reinforcing filler which is oltained from the domestic area of Korea, Japan and U.S.A., is used by the method of KBr pellet. As a result of experiment, each absorption fond of the filler had appeared differently, because of each filler is consisted of different chemical composition, different crystalline form, different method of preparation, and the different ways of use etc. According to the above phenomena, each filler seems to have a different characteristic infrared absorption band, We can find what filler is used for sample rubber.
천연고무의 Damping Property 에 관한 연구
백남철,최재운 한국고무학회 1985 엘라스토머 및 콤포지트 Vol.20 No.3
The purpose of this study is to examine the dynamic properties, especially the damping and fatigue properites, of NR vulcanizates and to find out the vulcanizate which can be used as damping materials in industry. The results of this study can be summarized as follows: 1. In the ODR test, the S-2 vulcanizate was the fastest one in terms of having reached to optimum cure times (t_(90)) and, with the same formula, when 50phr of HAF carbon black loaded, the shortest optimum cure times has shown. 2. The S-2 vulcanizate was the best than the others in the physical properties. In aging properties, however, the E-1 vulcanizate appeared to be better than the other vulcanizates. 3. The results of the RDS test for the NR vulcanization system under the condition of 0.1% strain amplitude and 1 ㎐ frequency showed no connection between Tg and the the nature of the crosslinking system, but 50phr loading of HAF carbon black increased Tg. The damping values of vulcanizates in the elastic region showed a strong relations the damping values and the crosslinking system. The S-2 vulcanizate with higher crosslink density had lower damping values than other vulcanizates, and furthermore, the SH- 2 vulcanizates with 50phr loading of HAF carbon black increased the damping values. 4. The Goodrich Flexometer test showed that the heat buildup for the gum NR vulcanizates was less than for those which contained 50phr of HAF carbon black. In particular, the fatigue life of the vulcanizate with lower damping values appeared to be longer than that of the vulcanizates with higher damping values. In the fatigue test, the increasment of the loading or the temperature, applied to the vulcanizates, appeared to be shorten their fatigue life.