Synthesis and evaluation of poly(isoprene-co-acrylonitrile) as synthetic rubber with enhanced oil resistance
Increasing demand for durable rubber and rapid advancement in the automotive sector has made oil-resistant rubber an increasingly important material. Among them, nitrile rubber (NBR) is the most iconic due to its extraordinary oil resistance contributed by the polar nitrile pendant groups. Synthesis...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Budapest University of Technology
2023-10-01
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| Series: | eXPRESS Polymer Letters |
| Subjects: | |
| Online Access: | http://www.expresspolymlett.com/letolt.php?file=EPL-0012543&mi=cd |
| _version_ | 1797752325156110336 |
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| author | Zhen Hern Boon Yin Yin Teo Desmond Teck-Chye Ang |
| author_facet | Zhen Hern Boon Yin Yin Teo Desmond Teck-Chye Ang |
| author_sort | Zhen Hern Boon |
| collection | DOAJ |
| description | Increasing demand for durable rubber and rapid advancement in the automotive sector has made oil-resistant rubber an increasingly important material. Among them, nitrile rubber (NBR) is the most iconic due to its extraordinary oil resistance contributed by the polar nitrile pendant groups. Synthesis of NBR, however, is highly hazardous due to the explosive nature of the gaseous monomer butadiene. In this work, poly(isoprene-co-acrylonitrile) (NIR) was synthesized using free radical emulsion polymerization, with liquid monomer isoprene as the diene in the rubber formulation. The spectroscopic analysis confirmed the formation of NIR and indicated that the polymerized isoprene in the rubber is predominantly of 1,4-microstructure. A series of rubbers with different contents of acrylonitrile were produced and the mechanical, thermal, as well as oil resistant property of the resultant rubber films were evaluated. Vulcanized NIR films displayed glass transition temperatures from –9.4 to 20.2 °C, suggesting that the polymers are rubbery at ambient and higher temperatures. The NIR rubber films exhibited excellent oil resistance with less than 2% swelling in mineral oil, good thermal stability with onset degradation temperature in the range of 361.3 to 369.9 °C, and adequate mechanical strength from 1.61 to 8.23 MPa. The synthesized NIR rubber has the potential to serve as an alternative to NBR which had been traditionally used for oil resistance applications. |
| first_indexed | 2024-03-12T17:02:48Z |
| format | Article |
| id | doaj.art-437354199c9c4e6090b46cf8c489b922 |
| institution | Directory Open Access Journal |
| issn | 1788-618X |
| language | English |
| last_indexed | 2024-03-12T17:02:48Z |
| publishDate | 2023-10-01 |
| publisher | Budapest University of Technology |
| record_format | Article |
| series | eXPRESS Polymer Letters |
| spelling | doaj.art-437354199c9c4e6090b46cf8c489b9222023-08-07T08:45:42ZengBudapest University of TechnologyeXPRESS Polymer Letters1788-618X2023-10-0117101042105510.3144/expresspolymlett.2023.78Synthesis and evaluation of poly(isoprene-co-acrylonitrile) as synthetic rubber with enhanced oil resistanceZhen Hern BoonYin Yin TeoDesmond Teck-Chye AngIncreasing demand for durable rubber and rapid advancement in the automotive sector has made oil-resistant rubber an increasingly important material. Among them, nitrile rubber (NBR) is the most iconic due to its extraordinary oil resistance contributed by the polar nitrile pendant groups. Synthesis of NBR, however, is highly hazardous due to the explosive nature of the gaseous monomer butadiene. In this work, poly(isoprene-co-acrylonitrile) (NIR) was synthesized using free radical emulsion polymerization, with liquid monomer isoprene as the diene in the rubber formulation. The spectroscopic analysis confirmed the formation of NIR and indicated that the polymerized isoprene in the rubber is predominantly of 1,4-microstructure. A series of rubbers with different contents of acrylonitrile were produced and the mechanical, thermal, as well as oil resistant property of the resultant rubber films were evaluated. Vulcanized NIR films displayed glass transition temperatures from –9.4 to 20.2 °C, suggesting that the polymers are rubbery at ambient and higher temperatures. The NIR rubber films exhibited excellent oil resistance with less than 2% swelling in mineral oil, good thermal stability with onset degradation temperature in the range of 361.3 to 369.9 °C, and adequate mechanical strength from 1.61 to 8.23 MPa. The synthesized NIR rubber has the potential to serve as an alternative to NBR which had been traditionally used for oil resistance applications.http://www.expresspolymlett.com/letolt.php?file=EPL-0012543&mi=cdrubberoil resistancethermal propertiesmechanical propertiespoly(isoprene-co-acrylonitrile) elastomer synthetic rubber thermal degradation radical polymerization tensile testing |
| spellingShingle | Zhen Hern Boon Yin Yin Teo Desmond Teck-Chye Ang Synthesis and evaluation of poly(isoprene-co-acrylonitrile) as synthetic rubber with enhanced oil resistance eXPRESS Polymer Letters rubber oil resistance thermal properties mechanical properties poly(isoprene-co-acrylonitrile) elastomer synthetic rubber thermal degradation radical polymerization tensile testing |
| title | Synthesis and evaluation of poly(isoprene-co-acrylonitrile) as synthetic rubber with enhanced oil resistance |
| title_full | Synthesis and evaluation of poly(isoprene-co-acrylonitrile) as synthetic rubber with enhanced oil resistance |
| title_fullStr | Synthesis and evaluation of poly(isoprene-co-acrylonitrile) as synthetic rubber with enhanced oil resistance |
| title_full_unstemmed | Synthesis and evaluation of poly(isoprene-co-acrylonitrile) as synthetic rubber with enhanced oil resistance |
| title_short | Synthesis and evaluation of poly(isoprene-co-acrylonitrile) as synthetic rubber with enhanced oil resistance |
| title_sort | synthesis and evaluation of poly isoprene co acrylonitrile as synthetic rubber with enhanced oil resistance |
| topic | rubber oil resistance thermal properties mechanical properties poly(isoprene-co-acrylonitrile) elastomer synthetic rubber thermal degradation radical polymerization tensile testing |
| url | http://www.expresspolymlett.com/letolt.php?file=EPL-0012543&mi=cd |
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