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首页> 外文期刊>Journal of Applied Polymer Science >Sorption Behavior of Biodegradable Polyurethanes with Carbohydrate Crosslinkers
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Sorption Behavior of Biodegradable Polyurethanes with Carbohydrate Crosslinkers

机译：碳水化合物交联剂对可降解聚氨酯的吸附行为

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摘要

Polyether-polyurethanes (PUs) with a series of carbohydrate crosslinkers: monosaccharide (glucose), disaccharide (fructose) and polysaccharide (starch), were synthesized. The kinetics of swelling was studied in industrially important solvents like toluene, xylene and chlorobenzene. The R value and diol / triol ratio were varied to study the effect on crosslink density and sorption. It was observed that the swelling extent increased with increasing concentration of crosslinker in the polymer. Interestingly the effect of diisocyanate concentration on extent of sorption varied with the type of carbohydrate used for crosslinking. Considering the effect of diisocyanate concentration, the PUs containing disaccharide sucrose showed greater solvent uptake. Though the sorption behaviours were different, the solubility parameters of all PUs were the same irrespective of the type and concentration of the crosslinkers. All the PUs were observed to be biodegradable with glucose containing PUs exhibiting highest weight loss. Scanning electron microscope revealed absence of phase segregation in all the PU systems.
机译：合成了具有一系列碳水化合物交联剂的聚醚-聚氨酯（PU）：单糖（葡萄糖），二糖（果糖）和多糖（淀粉）。在工业上重要的溶剂（如甲苯，二甲苯和氯苯）中研究了溶胀动力学。改变R值和二醇/三醇比以研究对交联密度和吸附的影响。观察到溶胀程度随着聚合物中交联剂浓度的增加而增加。有趣的是，二异氰酸酯浓度对吸附程度的影响随用于交联的碳水化合物的类型而变化。考虑到二异氰酸酯浓度的影响，含有二糖蔗糖的聚氨酯显示出更大的溶剂吸收。尽管吸附行为不同，但所有PU的溶解度参数均相同，无论交联剂的类型和浓度如何。观察到所有PU都是可生物降解的，其中葡萄糖具有最大的重量减轻。扫描电子显微镜显示在所有PU系统中都没有相分离。

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