| Research on Formula of NR Compound with Low Static and Dynamic Stiffness at Low Temperature |
| Received:October 14, 2022 Revised:October 14, 2022 |
| DOI：10.12136/j.issn.1000-890X.2023.08.0596 |
| Key Words: NR；N-phenyl maleimide imide；low temperature crystallization；low static and dynamic stiffness |
| Author Name | Affiliation | E-mail | | JI Leibo | Zaozhuang Sanxing High and New Material Co.，Ltd | jlbjly@163. com | | ZHANG Xinjun | Beijing Research and Design Institute of Rubber Industry Co.，Ltd | |
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| Abstract: |
| The formula of natural rubber（NR） compound with low static and dynamic stiffness at low temperatures was studied.The results showed that N-phenyl maleimide imide（N-PMI） had high reactivity and could be bonded to the main chain of NR molecules through addition reaction during mixing or/and vulcanization which reduced the regularity of NR molecular chain，and thus significantly reduced the low-temperature crystallinity of NR.The NR compounds with N-PMI cured with sulfur vulcanization system or peroxide vulcanization system had low elastic modulus and hardness at －40 ℃.The products using these two NR compounds exhibited low static and dynamic stiffnesses at low temperatures，and the optimal dosage of N-PMI for both NR compounds was 5 phr. |
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