| Preparation and Properties of EPDM/EVA Foaming Blend |
| Received:April 02, 2022 Revised:April 10, 2022 |
| DOI：10.12136/j.issn.1000-890X.2022.11.0812 |
| Key Words: EPDM；EVA；foaming agent；foamed blend；absorbance；cell size；slip resistance |
| Author Name | Affiliation | E-mail | | ZHEN Jianbin* | Taiyuan Institute of Technology | zhenjb187@163.com | | YI Jiajia | Taiyuan Institute of Technology | | | JI Zhanyou | Shaanxi University of Science and Technology | | | ZENG Haonan | Taiyuan Institute of Technology | | | LIU Hanlin | Taiyuan Institute of Technology | |
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| Abstract: |
| EPDM/EVA foaming blend was prepared by molding process and chemical foaming method
using ethylene propylene diene rubber（EPDM） and ethylene-vinyl acetate copolymer（EVA） as main
materials. The compatibility and migration behavior of EPDM and EVA were studied，and the effect of
foaming agent AC dosage（0. 5，1，1. 5，2 and 2. 5 phr） on the cell size distribution，physical properties and
slip resistance of EPDM/EVA foaming blend was studied by single factor test method. The results showed
that when blending ratio of EPDM/EVA was 75/25，the difference between the ratios of EPDM absorbance
to EVA absorbance of the central layer and the outermost layer of the EPDM/EVA blend was the largest，
which indicated that the migration effect of EPDM and EVA was the most obvious under this blending ratio，
and it was found that EPDM continuously migrated towards the outer layer. With the increase of the amount
of foaming agent AC，the average cell diameter and Shore A hardness of EPDM/EVA foaming blend first
decreased and then increased，while the density，tensile strength and tear strength were reduced，the resilience
value did not change much，and the slip resistance was improved. |
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