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首页> 外文期刊>Journal of Polymers and the Environment >Preparation and Properties of Bio-based Polyurethane Containing Polycaprolactone and Natural Rubber
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Preparation and Properties of Bio-based Polyurethane Containing Polycaprolactone and Natural Rubber

机译：包含聚己内酯和天然橡胶的生物基聚氨酯的制备和性能

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摘要

Novel polyurethanes were successfully synthesized by a one-shot polymerization. They contained poly(e-caprolactone) diol (PCL diol) and hydroxyl telechelic natural rubber (HTNR) as the soft segment. The effect of the NCO∶OH molar ratio (0.75∶1.00-2.25∶1.00), chain extender and PCL:HTNR molar ratio (1∶1, 0.7∶0.3 and 0.3∶0.7) on the thermal and mechanical properties of the resulting polyurethane were investigated. FTIR analysis showed the presence of urethane linkages and crosslinking or chain branching. The derived polyurethanes demonstrated excellent mechanical properties, which depended on their chemical composition. Their tensile behavior seemed to have typical elastomeric characteristics. Polyurethanes became amorphous and showed a phase separation between the PCL diol and HTNR segments. The phase separation between the soft and the hard segments was observed by the DMTA technique whereas DSC results showed only the glass transition temperatures of the soft segment. The longer and more flexible chain and non-polarity of HTNR was responsible of a decrease in the mechanical properties and transition temperatures.
机译：通过一次聚合成功地合成了新型聚氨酯。它们包含聚（ε-己内酯）二醇（PCL二醇）和羟基远螯天然橡胶（HTNR）作为软链段。 NCO∶OH摩尔比（0.75∶1.00-2.25∶1.00），扩链剂和PCL∶HTNR摩尔比（1∶1、0.7∶0.3和0.3∶0.7）对所得聚氨酯热力学性能的影响被调查了。 FTIR分析表明存在氨基甲酸酯键和交联或链支化。衍生的聚氨酯表现出优异的机械性能，这取决于它们的化学组成。它们的拉伸性能似乎具有典型的弹性体特性。聚氨酯变成无定形并在PCL二醇和HTNR链段之间显示出相分离。通过DMTA技术观察到软链段和硬链段之间的相分离，而DSC结果仅显示软链段的玻璃化转变温度。 HTNR更长且更灵活的链和非极性是导致机械性能和转变温度降低的原因。

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  • 来源
    《Journal of Polymers and the Environment》 |2013年第3期|807-815|共9页
  • 作者

    Wannarat Panwiriyarat; Varaporn Tanrattanakul; Jean-Francois Pilard; Pamela Pasetto; Chuanpit Khaokong;

  • 作者单位

    Bioplastic Research Unit, Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Songkla 90112, Thailand,Institut des Molecules et Materiaux du Mans, Universite du Maine, 72085 Le Mans Cedex, France;

    Bioplastic Research Unit, Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Songkla 90112, Thailand;

    Institut des Molecules et Materiaux du Mans, Universite du Maine, 72085 Le Mans Cedex, France;

    Institut des Molecules et Materiaux du Mans, Universite du Maine, 72085 Le Mans Cedex, France;

    Bioplastic Research Unit, Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Songkla 90112, Thailand;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Polyurethane; Natural rubber; Poly(caprolactone); Bio-based plastic; Elastomer; Renewable resources;

    机译：聚氨酯天然橡胶;聚己内酯;生物基塑料;弹性体可再生资源;

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