• Fire Science and Engineering
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• v.16 no.4
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• pp.65-71
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• 2002

In this paper, the thermal and flame properties of GFRP with various flame retardant(aluminum trihydrate, antimony trioxide) compositions have been investigated by thermal analysis and flammability tests(LOI test, flammability 45 degree test). The flame and mechanical properties(hardness, tensile strength, modulus) of general purpose grade glass fiber/unsaturated polyester composite with flame retardant composition have been also evaluated. The effect of cure pressure on the flame properties of aerospace grade glass fiber/epoxy composite was investigated. Considering the flame and mechanical property of composite, we could determine the optimum flame retardant composition(ATH 10∼20 phr). Test results show that the flame property of glass fiber/epoxy composite is considerably affected by cure pressure conditions.

• Transactions on Electrical and Electronic Materials
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• v.10 no.1
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• pp.9-15
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• 2009

There is a growing demand for a high voltage silicone rubber composite with high mechanical property and high electrical property. The effect of modified cross-linking agent on the mechanical, electrical properties, and short-circuit test performance of silicone rubber insulators have been investigated. To use base polymer, the various silicone polymers were prepared by the equilibrium polymerization. Aluminum trihydrate surface was treated by vinyl silane. Liquid silicone rubber nanocomposite was prepared from the compounding of VPMPS, HPDMS, catalyst, and alumina trihydrate modified with 1,3,5-trivinyl-l,3,5-trimethylcyclotrisiloxane. The mechanical property and electrical property for insulation materials were measured, indicating the high tensile strength and the good short-circuit property.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2003.11a
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• pp.591-593
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• 2003

Silicone composites for high voltage insulator(HVI SC) were prepared by adding aluminum trihydrate(ATH) treated by surface treatment agent to base silicone compound at the ratio of 100:20, 100:40, 100:60, 100:80, and 100:100, respectively. And also, ATH was treated by various surface treatment agents, such as stearic acid, acryl silane vinyl silane under compounding process. electrical properties were investigated for the various contents of ATH and solace-treatment agents we mlas ured volume resistivity, breakdown and tracking resistance were for HVISC containing ATH treated by viuyl silane.

• Elastomers and Composites
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• v.38 no.3
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• pp.227-234
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• 2003

Silicone composites for high voltage insulator (HVI SC) were prepared by adding aluminum trihydrate(ATH) treated by surface treatment agent to base silicone compound at the ratio oi 100:20, 100:40, 100:60, 100:80, and 100:100, respectively And also, ATH was treated by various surface treatment agents, such as stearic arid, acryl silane, and vinyl silane under compounding process. Mechanical properties and electrical properties were investigated for the various contents of ATH and surface-treatment agents. Mechanical properties such as tensile strength, elongation, and tear strength decreased as the load of ATH increased. Volume resistivity, AC break down strength, and tracking resistance for HVI SC containing ATH treated by vinyl silane were better than those for HVI SC containing ATH treated by other surface treatment agents, such as stearic acid and acryl silane. Polymer-filler interaction of silicone composites according to surface treatment agents was studied by measuring bound rubber contend(BR). From the experimental results, BR of silicone composite containing ATH treated with vinyl silane was higher than that of the others. The degree of rule for silicone composite was investigated using Rheometer. Maximum torque of silicone composites contaning ATH treated with vinyl silane was higher than that of silicone composite contaning ATH treated with other surface agents.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2010.06a
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• pp.90-90
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• 2010

Cycloaliphatic Epoxy와 Bisphenol Epoxy를 각각 mol-wt%비 (80:20, 50:50, 20:80)로 혼합하고 Epoxy Silaned Silica, 바ed Silica, Spherical Silica, ATH(Aluminum Trihydrate)를 충진하여 내트래킹 특성 및 인장강도, 충격강도 등의 기계적 강도를 비교하였다. Cycloaliphatic 수지는 Huntsman사(社)의 CY5622, Bisphenol 수지는 Hexion사(社)E의 Epikote2200을 사용하였으며, Silaned Silica 및 Fused Silica는 Quatzwerke사(社)의 W12, FW12를 사용하였다. 전체 혼합물 중, 에폭시는 약 36%, 실리카는 약 34~540%, ATH는 약 10~30% 이다. 실험결과, ATH 함량이 높은 조성 및 Epoxy Silaned Silica를 사용한 조성과 Cycloaliphatic 혼합비율이 높은 조성이 우수한 내트래킹 특성을 보였다. 또한, Silica의 함량이 증가할수록 기계적 강도가 증가하였으며, Silaned Silica를 사용하였을 때 가장 우수한 특성을 나타내었다. 본 실험의 결과를 통해 옥외용 내트래킹 특성 규격인 IEC60587 4.5kV/6h를 만족하는 조성에 대해 가늠이 가능하였고, 각 조성에 따른 기계적 강도의 확인이 가능하였다.