• Elastomers and Composites
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• 제42권4호
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• pp.249-258
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• 2007

본 연구에서는 웨더스트립 공정스크랩인 폐 EPDM을 재활용하기 위해 고온전단분쇄기를 이용하여 표면활성화 된 EPDM 분말을 제조하여 이의 물성과 냄새성분분석에 관한 연구를 수행하였다. 본 연구에서 사용되어진 폐 EPDM은 solid, sponge, solid+sponge, solid+metal형으로서 입도분석과 SEM을 통해 입자크기와 입도 분포도를 조사하였고, 가교제를 첨가하여 활성화 된 분말표면의 재가교 여부를 조사하였다. Solid형의 경우 가장 좁은 입도 분포도와 작은 입자크기, 상대적으로 높은 인장 물성을 나타내었다. 화학적 표면 탈황을 유도하기 위해 표면활성화제를 첨가한 결과 표면활성화제의 첨가량이 증가할수록 효율적인 탈황이 유도되었다. TPE제조를 위해 폴리올레핀과의 블렌드 시 활성화된 EPDM 분말의 동적가황 가능성을 확인하기 위하여 가교제를 첨가하여 반응을 진행한 결과 황을 첨가할 경우 가교반응이 진행되지 않았고, DCP(dicumyl peroxide)의 경우 6 phr이 첨가되었을 때 효율적인 표면 가교반응 및 최적의 인장 물성을 나타내었다. 화학적 표면 활성화를 유도한 폐 EPDM 분말의 경우 표면활성화제의 첨가로 인해 냄새가 발생되는데, 이를 제거하기 위하여 수분흡착 공정과 rose oil 첨가 공정을 진행하였으며 GC/MS를 통해 냄새 성분을 분석하였다.

• 청정기술
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• 제15권3호
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• pp.180-185
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• 2009

자동차용 웨더스트립 제조공정 중 발생하는 에틸렌-프로필렌 고무 스크랩을 고온전단분쇄기를 이용하여 표면활성화 된 분말을 얻은 후 이를 폴리프로필렌과 블렌드하여 열가소성탄성체를 제조하기 위한 기초연구를 수행하였다. 에틸렌-프로필렌 고무 스크랩 분쇄 시 표면활성제를 1.5 phr 첨가하면 최적의 표면활성화 된 분말을 얻을 수 있었다. 폴리프로필렌의 경우는 maleic anhydride를 반응블렌드에 의해 그라프트시켜 기능화 하였다. 기능화된 에틸렌-프로펄렌 분말과 폴리프로필렌을 블렌드하여 열가소성탄성체를 제조할 때 계면젖음 특성이 중요하기 때문에 계면젖음성을 향상시키기 위하여 상용화제로 poly(ethylene-co-acrylic arid)를 폴리프로필렌에 첨가하였다. Poly(ethylene-co-acrylic acid)는 폴리프로필렌의 표면장력을 감소시켰으며 이로 인해 에틸렌-프로필렌 분말과의 계면젖음성이 크게 증진될 것으로 기대된다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1998년도 춘계학술대회 논문집
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• pp.207-210
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• 1998

Surface electrical conduction in insulator is most important factor to assess the insulation performances of outdoor insulating materials. In this paper, contamination performance of the widely used materials for outdoor insulator - porcelain, EPDM, Silicone rubber - were discussed by measuring properties of average leakage current and scintillation discharge pulses under artificial contamination conditions. The artificial contaminations used were deionized distilled water fog, 0.5wt% NaCl salt fog of light pollution and 2wt% NaCl salt fog of medium pollution. The average leakage current was appeared linearly with applied voltage at dry and clean surface condition. The magnitude of leakage current was almost same at different kinds of samples. In case of deionized distilled water fog, the characteristics of leakage current and applied voltage was most different to that in case of dry and clean condition. In case of salt fog pollution condition. The leakage current was increased above critical voltage. The scintillation discharges were also activated at the level the leakage current and scintillation discharges were increased with increasing pollution degree. The resistance to pollution properties of silicone rubber appeared excellent among them.

• 한국전기전자재료학회논문지
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• 제11권10호
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• pp.758-762
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• 1998

Electrical conduction property of insulator surface is most important factor to assess the insulation performances of outdoor insulating materials. In this paper, contamination performance of the materials to be used for outdoor insulator such as porcelain, EPDM, silicone rubber was discussed by measuring properties of average leakage current and scintillation discharge pulses under salt fog conditions. The fog was applied by nozzle in chamber and fogging fluids were deionized distilled water, 0.5wt% NaCI solution and 2wt% NaCl solution. The average leakage current showed linearly with applied voltage at dry and clean surface condition. The magnitude of leakage current was almost same at different kinds of samples. In case of deionized distilled water fog, the characteristics of leakage current and applied voltage were much different to those in case of dry and clean condition with 2wt% salt fog. In case of slat fog pollution condition, the leakage current was increased above critical voltage. the scintillation discharges were also activated at the level. The leakage current and scintillation discharges were increased with increasing pollution degree. The resistance to pollution properties of silicone rubber appeared excellent among them.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1998년도 춘계학술대회 논문집
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• pp.293-296
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• 1998

Surface electrical conduction in insulator is most important factor to assess the insulation performances of outdoor insulating materials. In this paper, contamination performance of the widely used materials for outdoor insulator - porcelain, EPDM, Silicone rubber - were discussed by measuring properties of average leakage current and scintillation discharge pulses under artificial contamination conditions. The artificial contaminations used were deionized distilled water fog, 0.5wt% NaCl salt fog of light pollution and 2wt% NaCl salt fog of medium pollution. The average leakage current was appeared linearly with applied voltage at dry and clean surface condition. The magnitude of leakage current was almost same at different kinds of samples. In case of deionized distilled water fog, the characteristics of leakage current and applied voltage was most different to that in case of dry and clean condition. In case of salt fog pollution condition, The leakage current was increased above critical voltage. The scintillation discharges were also activated at the level. the leakage current and scintillation discharges were increased with increasing pollution degree. The resistance to pollution properties of silicone rubber appeared excellent among them.