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Compression Set of SEBS/PP Elastomer Modified with PPO

Jing Sun

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Abstract

SEBS/PP elastomer modified with PPO was prepared by means of blend with a twin-screw-extruder,and the heat resistance and compression set of the blend was studied. The result indicated that PPO was compatible with the PS in SEBS,resulted in a new phase ragin with a higher glass transition temperature. The compression set at high temperature of the elastomer was greatly improved by the addition of PPO,while the hardness and mechanical properties of the elastomer kept unchanged basically. When the mass percentage of PPO was 15%～20% of that of SEBS,the compression set of the elastomer at 70℃ was 33%～35%,less than 50%,came up to the level of the national standard for the rubber sealing strip for vehicle windows.

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What this paper is about

SEBS/PP elastomer modified with PPO was prepared by means of blend with a twin-screw-extruder,and the heat resistance and compression set of the blend was studied. The result indicated that PPO was compatible with the PS in SEBS,resulted in a new phase ragin with a higher glass transition temperature. The compression set at high temperature of the elastomer was greatly improved by the addition of PPO,while the hardness and mechanical properties of the elastomer kept unchanged basically. When the mass percentage of PPO was 15%～20% of that of SEBS,the compression set of the elastomer at 70℃ was 33%～35%,less than 50%,came up to the level of the national standard for the rubber sealing strip for vehicle windows.

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Available abstract

SEBS/PP elastomer modified with PPO was prepared by means of blend with a twin-screw-extruder,and the heat resistance and compression set of the blend was studied. The result indicated that PPO was compatible with the PS in SEBS,resulted in a new phase ragin with a higher glass transition temperature. The compression set at high temperature of the elastomer was greatly improved by the addition of PPO,while the hardness and mechanical properties of the elastomer kept unchanged basically. When the mass percentage of PPO was 15%～20% of that of SEBS,the compression set of the elastomer at 70℃ was 33%～35%,less than 50%,came up to the level of the national standard for the rubber sealing strip for vehicle windows.

Key concepts: Compression set, Elastomer, Materials science, Composite material, Compression (physics), Natural rubber, Glass transition, Polymer

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