| MORPHOLOGY OF VULCANIZED EPDM/PP BLEND THERMOPLASTIC ELASTOMERS |
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| 作者姓名： | 殷敬华 周恩乐 金桂萍 纪锋 黄葆同 |
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| 作者单位： | Changchun Institute of Applied Chemistry，Academia Sinica，Changchun Institute of Applied Chemistry，Academia Sinica，Changchun Institute of Applied Chemistry，Academia Sinica，Jiamusi Institute of Chemieal Engineering，Changchun Institute of Applied Chemistry，Academia Sinica |
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| 摘 要： | Dynamic vulcanization of rubber in rubber/plastic blend thermoplastic elastomers poses challenge to the traditional concept on morphology of thermoplastic elastomers. TEM and SEM micrographs of OsO_4-stained samples and samples with EPDM dissolved by heptane or etched with CrO_3/H_2SO_4 reveal that the blends with uncrosslinked EPDM have a predominant component as the continuous phase, while the blends with crosslinked EPDM always have PP as the continuous phase even at R/P>50/50. In the latter case, crosslinked EPDM exists as the micro-domains imbedded in the PP matrix. This explains the plasticity and higher strength of the crosslinked blends.
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