| Research on Properties of HNBR with Different Molecular Structure |
| Received:January 15, 2021 Revised:January 15, 2021 |
| DOI：10.12136/j.issn.1000-890X.2021.08.0590 |
| Key Words: HNBR；hydrogenation degree；acrylonitrile content；compound；vulcanizate；physical property |
| Author Name | Affiliation | E-mail | | Zheng Fangyuan* | SINOPEC Beijing Research Institute of Chemical Industry Yanshan Branch，National Engineering Research Center for Synthesis of Novel Rubber and Plastic Materials | zhengfy.bjhy@sinopec.com | | Wang Leilei | SINOPEC Beijing Research Institute of Chemical Industry Yanshan Branch，National Engineering Research Center for Synthesis of Novel Rubber and Plastic Materials | |
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| Abstract: |
| The properties of hydrogenated nitrile butadiene rubber（HNBR） with different molecular
structures were studied in terms of hydrogenation degree and acrylonitrile content. The results showed
that under the same acrylonitrile content of HNBR，with the increase of hydrogenation degree of HNBR，
the dispersion of the filler was reduced，the heating rate of the compound in the mixing process was
slowed down，the flowability decreased，the curing rate became slower，the modulus of the vulcanizate
decreased，the elongation at break and compression set increased. The compression set resistance of high
hydrogenation degree HNBR vulcanizate could be improved by two stage vulcanization. Under the same
hydrogenation degree of HNBR，with the increase of acrylonitrile content of HNBR，the dispersion of the
filler was improved，the mixing energy consumption and discharge temperature of the compound decreased
significantly，the flowability increased，the scorch time was prolonged，the modulus and tensile strength of the
vulcanizate were improved，the elongation at break decreased，the oil resistance was improved significantly，
and the compression set increased. |
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