Preparation, Characterization and Application of UV-Curable Flexible Hyperbranched Polyurethane Acrylate

被引：65

作者：

Xiang, Hongping ^{[1
]}

Wang, Xiaowei ^{[1
]}

Lin, Guanghong ^{[1
]}

Xi, Lu ^{[1
]}

Yang, Yan ^{[1
]}

Lei, Dehua ^{[1
]}

Dong, Haihui ^{[1
]}

Su, Jiahui ^{[1
]}

Cui, Yanyan ^{[1
]}

Liu, Xiaoxuan ^{[1
]}

机构：

[1] Guangdong Univ Technol, Sch Mat & Energy, Guangdong Prov Key Lab Funct Soft Condensed Matte, Guangzhou 510006, Guangdong, Peoples R China

来源：

POLYMERS | 2017年 / 9卷 / 11期

关键词：

hyperbranched polyurethane acrylate; UV-curing; flexibility; coatings; reinforcements; URETHANE-ACRYLATES; POLYMERS; COATINGS; CHEMISTRY; OLIGOMERS;

D O I：

10.3390/polym9110552

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 UV-curable hyperbranched polyurethane acrylate (FHBPUA) with excellent flexibility is successfully synthesized based on a reaction of hydroxyl terminated hyperbranched polyurethane (regarded as core) with flexible semiadduct urethane monoacrylate (regarded as arms). The structure and property of FHBPUA is firstly analyzed and then utilized as functional additives to ameliorate the UV-curing and mechanical properties of epoxy acrylate resin. The degree of branching of FHBPUA turns out to be 0.82. Its thermal decomposition process consists of three different stages, and the glass transition temperature is around 65 degrees C. The freestanding FHBPUA film (similar to 30 m thickness) can be UV-cured within 3 s, and its flexibility is up to 1 mm. With the increase of FHBPUA content to 10 wt %, the UV-curing time of UV1000 film decreases from 6 to 3 s, flexibility strikingly increases from 10 to 1 mm, and adhesive force also improves from 5 to 3 grades, meanwhile its glossiness is not influenced by FHBPUA. In addition, a certain amount of FHBPUA can improve the tensile strength and elongation at break of UV1000 film. This novel FHBPUA can be used not only to develop flexible UV-curable freestanding films but also as functional additives to perfect other UV-curable compositions like coatings, inks and 3D printed parts.

引用

页数：12

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