Polyhydroxyurethane thermosets from novolac epoxide: Synthesis and its nanostructured blends with poly(trifluoroethylacrylate)-block-poly (N-vinylpyrrolidone) diblock copolymer

被引：8
|
作者：
Li, Lei [1 ,2 ]
Ge, Wenming [1 ,2 ]
Zhao, Bingjie [1 ,2 ]
Adeel, Muhammad [1 ,2 ]
Mei, Honggang [1 ,2 ]
Zheng, Sixun [1 ,2 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China
[2] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China
来源：
POLYMER | 2021年 / 213卷
基金：
中国国家自然科学基金;
关键词：
Five-membered cyclic carbonate; Polyhydroxyurethane; Block copolymer; Shape memory; Reprocessing properties; NON-ISOCYANATE POLYURETHANES; SOYBEAN-OIL; LIMONENE DICARBONATE; CYCLIC CARBONATES; NETWORKS; BLOCK; RESIN; RECOVERY; BEHAVIOR; LIGNIN;
D O I：
10.1016/j.polymer.2020.123314
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
A novel five-membered cyclic carbonate compound was synthesized via the reaction of novolac epoxide with carbon dioxide. The cyclic carbonate was then used as the precursor to prepare polyhydroxyurethane (PHU) thermosets with a trifunctional polyetheramine (i.e., Jeffamine T 403) as the crosslinking agent. To improve the thermomechanical properties as well as hydrophobicity, the PHU thermosets were further nanostructured by the use of a poly(trifluoroethyl acrylate)-block-poly(N-vinylpyrrolidinone) (PTFEA-b-PVPy) diblock copolymer. Compared to plain PHU thermoset, the nanostructured thermosets displayed enhanced glass transition temperatures (T-g's) and mechanical properties. Meanwhile, the surface hydrophobicity was significantly improved; the water surface contact angles of the thermosets have been increased up to 94.6 degrees. With the introduction of PTFEA-b-PVPy, the nanostructured PHU thermosets still preserved the excellent shape memory and reprocessability at elevated temperature.
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页数：10
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