• The tire
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• s.52
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• pp.23-24
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• 1974

브릳지스톤 타이어는 73. 6.23 고무 기자회의 요망을 받아 들여 동사의 신예스틸타이어전문공장인 회목(도찌기)공장을 처음으로 공개했다. 스틸타이어 전문공장이라고 하는 것은 이것이 일본 유일의 것이며 보통의 라디알공장조차 비공개를 원칙으로 하고 있는데가 많은가운데 건설, 2년 2개월이라고 하는 짧은 조업기간임에도 불구하고 공개에 응했다는 것은 동사의 스틸타이어에 기울이는 열의와 기술적 자신을 말하는 것이라고도 볼수 있어 주목되었다. 또한 동공장은 74년 4월완전일관 공장으로 된다. 이하는 회목공장의 견학기이다.

• The tire
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• s.99
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• pp.42-47
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• 1982

본고는 해외 각국에서 발간되고 있는 고무 및 타이어세계 전문지들을 통하여 전해지는 해외주요 타이어 메이커의 최근동향을 살펴본 것이다. 수년 동안이나 업적이 계속 강화되어온 Firestone과 Pirelli의 업적이, 부채산성부문의 과감한 정리와 경영합리화로 차츰 회복단계에 있다고 하며, 영국의 Dunlop사에서도 계속체질개선에 꾸준히 노력하고 있으나 아직도 당분간 고전할 것으로 예측하고 있다. 한편 일본의 Bridgestone은 세계 제3위의 꿈을 실현하기 위하여 미국진출을 결정하고 한층 국제 전략을 강화하고 있다.

• Applied Chemistry for Engineering
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• v.20 no.4
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• pp.375-380
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• 2009

Polyepichlorohydrin rubber was treated with sodium azide (Na$N_3$) to replace its chlorine by azide ($N_3$). Then, the azidated polyepichlorohydrin rubber (Az-PECH) was blended with thermoplastic styrene-acrylonitrile copolymer with the rubber/plastic ratio of 80/20, 70/30 and 60/40 (wt/wt). The miscibility, mechanical and dynamic mechanical properties as well as elastic recovery properties of the blends were evaluated by DMA (Dynamic Mechanical Analyzer) and tensile tests. When azidation level in azidated PECH was upto 50%, the blends exhibited excellent miscibility, manifested by a single $T_g$, and fairly good elastic recovery. When azidation level was 75%, the blends showed phase separation. The miscible Az-PECH/SAN blends exhibited typical thermoplastic elastomer like properties, ie. melt processibility and high extensibility as well as good elastic recovery rate. It was also observed from combustion test that higher energy is released with the increase in the azidation level of the Az-PECH in the blends.

• Applied Chemistry for Engineering
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• v.10 no.3
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• pp.419-426
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• 1999

In this study, the reaction rate constant, activation energy, total crosslinking density, elastic constant, cure properties ($t_5,\;t_{90}$), modulus, and abrasion resistance of rubber compounds were investigated as a function of cure temperatures, cure systems and reinforcing filler loadings. Reaction rate constants showed strong dependence on thc carbon black loading, cure temperature and cure system, and increased sharply with increasing the reaction temperatures. The lowest activation energy was obtained in the efficient cure (EC) system which corresponds to the high level of sulfur to accelerator ratio, and the activation energy was decreased with decreasing the carbon black loadings. The change of carbon black loadings directly affects the modulus and abrasion resistance, but the change of cure system showed various effects on the rubber compounds. Increased carbon black loadings showed the high modulus, improved abrasion resistance and short scorch time but decrease in crosslinking density and elastic constant. Higher crosslinking density and elastic constant were shown in the EC cure system regardless of carbon black loadings, but scorch timc ($t_5$) was not affected by the change of the ratio of sulfur to accelerator. Rapid optimum cure time ($t_{90}$) were showen in the EC cure system. Also, the equivalent cure curve coefficient of rubber compound was 0.96 for conventional cure (CC) system, and 0.94 for semi-efficient cure (SEC) and EC system regardless carbon black loadings. As regarding the abrasion resistance, wear volume showed the logarithmic increase for the loaded weight.

• Applied Chemistry for Engineering
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• v.22 no.4
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• pp.411-415
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• 2011

Various types of accelerators, thiuram (TMTD, DPTT), thiazole (MBT, MBTS), and sulfenamide (CBS, NOBS) are added into a silica filled natural rubber compound. Their effects on vulcanization and mechanical properties are investigated. TMTD showed the fastest vulcanization rate, the higer maximum torque ($T_{max}$), and the excellent mechanical properties (300% modulus, tensile strength, elongation). MBT and MBTS showed an intermediate vulcanization rate between thiuram and sulfenamide type and added ones, and also showed the lower $T_{max}$ and mechanical properties compared to that of other compounds. Finally, NOBS showed the slowest vulcanization rate and the lower mechanical property but the moderate $T_{max}$.

• The tire
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• s.7
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• pp.25-29
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• 1967

이미 Srereo Rubber 에 관해서 많은 연구보문이 발표된 바 있으나 대부분이 중합법, 성질 및 가공법등을 품목별 또는 부분적으로 해설한 것이기 때문에 본장에서는 미국제를 중심으로 각종 Stereo Rubber 의 중합촉매, 구조특성 및 가공특성등을 함께 묶어서 논술한 것을 소개코자 미국 Ohio주 Akron시 수강한 "Stereo Rubber"란 제목을 간추린 것이다.

• Agrochemical news magazine
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• v.24 no.2 s.185
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• pp.9-11
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• 2003

• The tire
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• s.6
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• pp.29-34
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• 1967

Low-structure black has proved to be a useful addition to the group of reinforcing fillers, allowing greater compounding flexibility and economy. Quite apart from the quality advantages, the volume used to date represents a considerable dollar saving by the rubber industry. Low-structure has also filled a need in a number of critical applications, and promises to become of increasing importance.

• Applied Chemistry for Engineering
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• v.28 no.4
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• pp.427-431
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• 2017

Recently, complaints of floor noise have been growing up with the rapid increase of the residential buildings. This demands the effective floor noise isolation system. Since the construction of high-rise the residential buildings will be increased even more in future, the noise isolation is a more important technology in the market. In this study, a new floor noise isolation panel (FNIP) was designed and manufactured using waste rubbers. The noise isolation was investigated at both laboratory and field conditions. Light and heavy weight shock wave showed 52 dB and 48 dB in the field test, respectively. The new system could reduce the total floor thickness by 22~42 mm.

• Applied Chemistry for Engineering
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• v.5 no.6
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• pp.935-942
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• 1994

Two types of ABS were prepared from diffrent types of rubber, and blends of the ABS and PMMA were compounded and evaluated in terms of morphology, mechaincal and rheological properties. In addition, the effect of carbon black in the ABS/PMMA blends were studied. With increasing PMMA content, flexural modulus, tensile yield strength, and surface gloss of the blends increased, but elongation at break and Izod Impact strength decreased. With carbon black addition, mechanical properties were generally decreased. Effects of the type of ABS, and carbon black on melt properties were also studied.