Synthesis of thermoplastic curdlan alkyl carbamates having hydrogen bonding ability,Journal of Polymer Science

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Synthesis of thermoplastic curdlan alkyl carbamates having hydrogen bonding ability
Journal of Polymer Science ( IF 3.9 ) Pub Date : 2020-05-21 , DOI: 10.1002/pol.20200087
Hidehisa Kawashima _{1,

2,

3} , Itsuki Ozawa ₄ , Masashi Kijima _{1,

2,

3}

Affiliation

Rigid and little moldable curdlan, a linear β‐1,3‐glucan having intra‐ and interchain hydrogen bonds, was reacted with several alkyl isocyanates, which gave thermoplastic curdlan alkyl carbamates (CrdC) with degree of substitution about 2. The alkyl carbamation at hydroxy groups in the glucan skeleton effectively broke the interchain hydrogen bonds of curdlan and increased flexibility of CrdC, while the newly formed carbamate moieties could moderately keep the hydrogen bonding ability in CrdC. Elongating the alkyl groups in the carbamate side chains increased solubility in organic solvents and thermoplasticity of CrdC, which enabled to make homogeneous and free‐standing films by both methods of solution‐casting and hot‐pressing.

中文翻译：

具有氢键结合能力的热塑性柯德兰烷基氨基甲酸酯的合成

使刚性和几乎不可模塑的柯德兰（具有链内和链间氢键的线性β-1,3-葡聚糖）与几种烷基异氰酸酯反应，得到取代度约为2的热塑性柯德兰烷基氨基甲酸酯（CrdC）。葡聚糖骨架中的羟基有效地打破了凝胶多糖的链间氢键并增加了CrdC的柔韧性，而新形成的氨基甲酸酯部分可以适度地保持CrdC中的氢键结合能力。氨基甲酸酯侧链中的烷基延长，增加了其在有机溶剂中的溶解度和CrdC的热塑性，从而能够通过溶液浇铸和热压两种方法制成均质且独立的薄膜。

更新日期：2020-05-21

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