杂化聚（羟基聚氨酯）：折叠片形态与热可逆粘附
Hybrid Poly(hydroxy urethane)s: Folded-Sheet Morphology and Thermoreversible Adhesion.
作者信息
Sukumaran Nair Anitha, Cherian Suchithra, Balachandran Nisha, Panicker Unnikrishnan Gopalakrishna, Kalamblayil Sankaranarayanan Santhosh Kumar
机构信息
Polymers and Special Chemicals Group and Analytical, Spectroscopy and Ceramics Group, Vikram Sarabhai Space Centre, Thiruvananthapuram 695022, India.
Department of Chemistry, National Institute of Technology, Calicut 673601, India.
出版信息
ACS Omega. 2019 Aug 9;4(8):13042-13051. doi: 10.1021/acsomega.9b00789. eCollection 2019 Aug 20.
Hybrid poly(hydroxy urethane)s (PHUs) are synthesized by copolymerizing aromatic/alicyclic cyclic carbonates with a polyether amine via addition polymerization. They result into polymers with an average molecular weight of 10 kDa and exhibit solubility in common organic solvents. The hybrid PHUs display up to 18 °C. PHUs are enriched with multiple H-bonded interactions and they are assessed using temperature-dependent H NMR and Fourier-transform infrared studies. PHUs possess folded-sheet morphology with nanogap between folds and nanowidth between chains. The secondary interactions bestow thermoreversible property to PHUs, and they display good adhesion to both polar (Al-Al) and nonpolar (HDPE-HDPE) substrates. Hybrid PHUs show improved optical transparency compared to homo PHUs. The PHUs are thermally stable up to 250 °C.
杂化聚（羟基聚氨酯）（PHUs）是通过芳香族/脂环族环状碳酸酯与聚醚胺经加成聚合反应共聚而合成的。它们形成平均分子量为10 kDa的聚合物，并在常见有机溶剂中具有溶解性。杂化PHUs的玻璃化转变温度高达18°C。PHUs富含多种氢键相互作用，并通过温度依赖的氢核磁共振和傅里叶变换红外光谱研究进行评估。PHUs具有折叠片层形态，折叠间有纳米间隙，链间有纳米宽度。这些二级相互作用赋予PHUs热可逆性，并且它们对极性（铝-铝）和非极性（高密度聚乙烯-高密度聚乙烯）基材都表现出良好的粘附性。与均相PHUs相比，杂化PHUs显示出改善的光学透明度。PHUs在高达250°C时具有热稳定性。
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