| Effects of Polypropylene Kinds on Performance of Butyl Rubber/Polypropylene Thermoplastic Vulcanizate |
| Received:March 14, 2023 Revised:March 14, 2023 |
| DOI：10.12136/j.issn.1000-890X.2024.07.0513 |
| Key Words: thermoplastic vulcanizate; butyl rubber; polypropylene; dynamic vulcanization |
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| Abstract: |
| The butyl rubber/polypropylene thermoplastic vulcanizate (IIR/PP-TPV) was prepared by dynamic vulcanization with octyl phenolic resin as vulcanizing agent. The effect of PP kinds on the mechanical and thermal properties of IIR/PP-TPV was investigated. The results show that IIR/PP-TPV prepared from homopolymer PP-1 shows excellent comprehensive properties, and can be used to benchmark automotive sealing strips products of Dawn. Its Shore A hardness, tensile strength and elongation at break is 76.7, 8.6 MPa and 365%, respectively. And the compression set is only 22 ~ 23%, and its tensile strength and elongation at break retention after aging is 98% and 87%, while IIR/PP-TPV prepared from ethylene-propylene block copolymer PP-2 and ethylene-propylene random copolymer PP-3 show poor comprehensive properties. This work can provide reference for the preparation of IIR/PP-TPV for low cost, green and environmental protection automotive sealing strips. |
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