羧基化苯乙烯-丁二烯橡胶/纤维素纳米晶体复合材料的制备与性能。
Preparation and properties of carboxylated styrene-butadiene rubber/cellulose nanocrystals composites.
机构信息
School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China.
出版信息
Carbohydr Polym. 2013 Jan 30;92(1):69-76. doi: 10.1016/j.carbpol.2012.09.054. Epub 2012 Oct 3.
A series of carboxylated styrene-butadiene rubber (XSBR)/cellulose nanocrystals (CNs) latex composites were successfully prepared. The vulcanization process, morphology, dynamic viscoelastic behavior, dynamic mechanical property, thermal and mechanical performance of the XSBR/CNs composites were investigated in detail. The results revealed that CNs were dispersed uniformly in the XSBR matrix and formed a strong filler-filler network. The dynamic mechanical analysis (DMA) showed that the glass transition temperature (T(g)) of XSBR matrix was shifted from 48.45 to 50.64 °C with 3 phr CNs, but decreased from 50.64 to 46.28 °C when further increasing CNs content up to 15 phr. The composites exhibited a significant enhancement in tensile strength (from 16.9 to 24.1 MPa) and tear strength (from 43.5 to 65.2 MPa) with loading CNs from 0 to 15 phr. In addition, the thermo-gravimetric analysis (TGA) showed that the temperature at 5% weight loss of the XSBR/CNs composites decreased slightly with an increase of the CNs content.
成功制备了一系列羧基化苯乙烯-丁二烯橡胶（XSBR）/纤维素纳米晶体（CNs）乳胶复合材料。详细研究了 XSBR/CNs 复合材料的硫化过程、形态、动态粘弹性能、动态力学性能、热性能和力学性能。结果表明，CNs 在 XSBR 基体中均匀分散，并形成了强的填料-填料网络。动态力学分析（DMA）表明，当加入 3 phr 的 CNs 时，XSBR 基体的玻璃化转变温度（Tg）从 48.45°C 升高至 50.64°C，但当进一步增加 CNs 的含量至 15 phr 时，Tg 从 50.64°C 降低至 46.28°C。复合材料的拉伸强度（从 16.9 MPa 提高到 24.1 MPa）和撕裂强度（从 43.5 MPa 提高到 65.2 MPa）均随着 CNs 用量从 0 增加到 15 phr 而显著提高。此外，热重分析（TGA）表明，XSBR/CNs 复合材料的 5%重量损失温度随着 CNs 含量的增加而略有降低。
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