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Plasticization and reinforcement behavior of low viscosity benzoxazine prepolymers for neoprene rubber

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Abstract

Neoprene rubber (CR) plasticized with low viscosity benzoxazine prepolymers (CRDBz and CRTBz) are fabricated by a novel process using co-curing mechanism. In this study, the influence of these prepolymers on the mechanical properties and processing behavior of CR has been investigated. It was found that the oscillating torques of DBz, TBz and DOP are 1.27 μN·m, 0.99μN·m and 0.50μN·m at 60 ℃, respectively. Tg decreased with increased DBz and TBz loadings of 5, 10, 15 phr, when the addition amount of DBz and TBz is 10 phr, the glass transition temperature (Tg) of CRDBZ10 and CRTBz10 is -41.70 ℃ and -40.44 ℃, respectively, lower than that of CR, -31.68 ℃. Compared with CR vulcanized rubber, the tensile strength of CRDBz10 and CRTBz10 was increased by 46.2% and 85.7%, respectively, and the elongation at break was increased by about 65.8%% for CRDBz10 and by about 44.4% for CRTBz10. Scanning electron microscope analysis (SEM) provides evidence that adding benzoxazine prepolymer has obvious plasticizing effect. The results of the ageing in ASTM-3 oil (100 ℃ × 72 h) indicated that prepolymers of DBz and TBz had both plasticizing and enhancing effects in CR materials.

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Funding

Wenzheng Zhang appreciates the financial support from Foundation of Liaoning Province Education Administration (Grant No. LJ2020007) and Shenyang Science and Technology Bureau, LiaoNing Province (Grant No.22–101-0–26 and Grant No.22–316-1–03). Zan Wang is grateful to the Science and Technology Funds from Foundation of Liaoning Province Education Administration (Grant No.LJ2019012).

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Authors and Affiliations

  1. Department of Materials Chemistry, School of Materials and Science Engineering, Shenyang University of Chemical Technology, Shenyang Economic & Technology Development Zone, Shenyang, China

    Wenzheng Zhang & Tingting Zhang

  2. Liaoning Province Petroleum-Chemical Industrial Planning & Designing Institute Co., Ltd, Shenyang, 110000, China

    Li Huang

  3. Shenyang No.4 Rubber Co., Ltd, Shenyang, 110022, China

    Cankui Cui

  4. Analysis and Test Center, Shenyang University of Chemical Technology, Shenyang Economic & Technology Development Zone, Shenyang, 110142, China

    Zan Wang

Authors
  1. Wenzheng Zhang
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  2. Tingting Zhang
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  3. Li Huang
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  4. Cankui Cui
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  5. Zan Wang
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Contributions

Conceptualization, Wenzheng Zhang; methodology, Wenzheng Zhang and Zan Wang; validation, Tingting Zhang and Li Huang; formal analysis, Wenzheng Zhang and Jiangnan Mou; investigation, Wenzheng Zhang and Zan Wang; data curation, Li Huang and Zan Wang; writing—original draft preparation, Tingting Zhang; writing—review and editing, Wenzheng Zhang; project administration, Wenzheng Zhang. All authors have read and agreed to the published version of the manuscript.

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Correspondence to Wenzheng Zhang or Zan Wang.

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Zhang, W., Zhang, T., Huang, L. et al. Plasticization and reinforcement behavior of low viscosity benzoxazine prepolymers for neoprene rubber. J Polym Res 30, 107 (2023). https://doi.org/10.1007/s10965-022-03425-4

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