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Evaluation of the engineered polysaccharide alpha‐1,3 glucan in a thermoplastic polyurethane model system
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2020-09-18 , DOI: 10.1002/app.49931 Jorge Wu Mok 1 , Natnael Behabtu 1 , Christian Lenges 1 , Ibrahim Sendijarevic 2 , Aisa Sendijarevic 2
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2020-09-18 , DOI: 10.1002/app.49931 Jorge Wu Mok 1 , Natnael Behabtu 1 , Christian Lenges 1 , Ibrahim Sendijarevic 2 , Aisa Sendijarevic 2
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Enzymatic polymerization is under development as novel scalable process technology to convert sucrose to engineered polysaccharides. Similar to established monomer‐based polymerization processes, this approach allows for the synthesis of glucose‐based polymers with controlled polymer linkage, structure, and material morphology. Using enzymatic polymerization, alpha‐1,3‐polyglucose (glucan) can now be produced from sugar on scales required for industrial applications. This alpha‐1,3 glucan material, with accessible primary and secondary hydroxyl groups within the overall defined particle morphology, is especially of interest as a partially reactive component in polyurethane chemistry. This study explores the impact of alpha‐1,3‐glucan as additive in a thermoplastic polyurethane model system and the improvement in mechanical properties of these composites. Glucan was effectively first mixed with a polyether polyol diol, forming a stable dispersion with narrow particle size distribution, followed by reaction with diisocyanate and chain extender to form the polyurethane matrix. The analysis of the generated polyurethane matrix indicates that the hydroxyl groups of the dispersed glucan particles directly react with isocyanate. Tetrahydrofuran solubility of the formed polyurethane compound decreased with the addition of glucan, providing evidence of covalent bonding of glucan leading to cross‐linking of the polyurethane matrix. Thermal analysis of this model system suggests that the glucan additive induces hard segment crystallization, resulting in increased hardness and tensile modulus compared with the reference. Based on the observed property enhancements, engineered polysaccharides provide a sustainable performance additive for polyurethane materials.
中文翻译：
在热塑性聚氨酯模型系统中评估工程多糖α-1,3葡聚糖
作为将蔗糖转化为工程多糖的新型可扩展工艺技术，酶促聚合技术正在开发中。与已建立的基于单体的聚合过程相似，这种方法可以合成具有受控的聚合物键，结构和材料形态的基于葡萄糖的聚合物。通过酶促聚合反应，现在可以按工业应用所需的规模从糖中生产α-1,3-聚葡萄糖（葡聚糖）。这种α-1,3葡聚糖材料在整体定义的颗粒形态内具有可及的伯羟基和仲羟基基团，作为聚氨酯化学中的部分反应性组分，尤其受到关注。这项研究探讨了alpha-1的影响，3-葡聚糖在热塑性聚氨酯模型体系中作为添加剂，并改善了这些复合材料的机械性能。首先将葡聚糖有效地与聚醚多元醇二醇混合，形成具有窄粒度分布的稳定分散体，然后与二异氰酸酯和扩链剂反应形成聚氨酯基质。对产生的聚氨酯基质的分析表明，分散的葡聚糖颗粒的羟基直接与异氰酸酯反应。随着葡聚糖的加入，所形成的聚氨酯化合物的四氢呋喃溶解度降低，提供了葡聚糖共价键导致聚氨酯基体交联的证据。此模型系统的热分析表明，葡聚糖添加剂可诱导硬链段结晶，与参考相比，导致硬度和拉伸模量增加。基于观察到的性能增强，工程多糖可为聚氨酯材料提供可持续的性能添加剂。
更新日期：2020-11-25
中文翻译：
在热塑性聚氨酯模型系统中评估工程多糖α-1,3葡聚糖
作为将蔗糖转化为工程多糖的新型可扩展工艺技术，酶促聚合技术正在开发中。与已建立的基于单体的聚合过程相似，这种方法可以合成具有受控的聚合物键，结构和材料形态的基于葡萄糖的聚合物。通过酶促聚合反应，现在可以按工业应用所需的规模从糖中生产α-1,3-聚葡萄糖（葡聚糖）。这种α-1,3葡聚糖材料在整体定义的颗粒形态内具有可及的伯羟基和仲羟基基团，作为聚氨酯化学中的部分反应性组分，尤其受到关注。这项研究探讨了alpha-1的影响，3-葡聚糖在热塑性聚氨酯模型体系中作为添加剂，并改善了这些复合材料的机械性能。首先将葡聚糖有效地与聚醚多元醇二醇混合，形成具有窄粒度分布的稳定分散体，然后与二异氰酸酯和扩链剂反应形成聚氨酯基质。对产生的聚氨酯基质的分析表明，分散的葡聚糖颗粒的羟基直接与异氰酸酯反应。随着葡聚糖的加入，所形成的聚氨酯化合物的四氢呋喃溶解度降低，提供了葡聚糖共价键导致聚氨酯基体交联的证据。此模型系统的热分析表明，葡聚糖添加剂可诱导硬链段结晶，与参考相比，导致硬度和拉伸模量增加。基于观察到的性能增强，工程多糖可为聚氨酯材料提供可持续的性能添加剂。
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