Synthesis of Hyperbranched Polymer for 3D Printing  

作　　者：Yibo Song Fahu Yang Zhenwei Zheng Pingping Wu Lixia Huo Jinshan Guo Jingxia Wang 

机构地区：[1]Institute of Polymer Science and Engineering,College of Chemistry and Chemical Engineering,Lanzhou University,Lanzhou,Gansu,730000 China [2]CAS Key Laboratory of Bio-inspired Materials and Interfacial Sciences,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing,100190 China

出　　处：《Chinese Journal of Chemistry》2021年第11期3064-3070,共7页中国化学（英文版）

基　　金：The authors thank the financial support by the MOST of China(No.2017YFA0204504);NSFC(Grant Nos.51873221,52073292,51673207,51373183);Chinese Academy of Sciences and Dutch research project(No.1A111KYSB20190072).

摘　　要：3D printing has been developing rapidly in recent years owing to its application in academic and industry areas,but the poor mechanical property of printing materials limits its application.Herein,a photocurable resin with good mechanical property was obtained based on hyperbranched polymer synthesized through the reaction of carboxylic acids with isocyanates catalyzed by magnesium stearate.Three kinds of hyperbranched polymers with different molecular weight were fabricated by modulating the content of isocyanates.By mixing hyperbranched polymer with acryloylmorpholine,polyethylene glycol diacrylate 400 and photoinitiator of 819,the photocurable resin was obtained.The influence of various factors on mechanical properties of samples was investigated such as molecular weight of hyperbranched polymer and the light exposure time.Comparing with the commercial resin,the flexural strength(116.06 MPa)and impact strength(34.59 kJ/m^(2))of the resultant resin increased by 21.2%and 20.8%,respectively.

关 键 词：POLYMERIZATION Carboxylic acids reacting with isocyanates PHOTOCHEMISTRY Mechanical properties 3D printing 

分 类 号：O64[理学—物理化学]