超支化聚酯改性酚醛树脂的制备与固化性能研究  

Preparation and Cure Kinetics of Hyperbranched Polyester Modified Phenolic Resins

作　　者：王松松[1] 周大鹏[2] 谷俐[2] 李坚[1] 俞立琼 

机构地区：[1]常州大学材料科学与工程学院,江苏常州213164 [2]嘉兴学院生物与化工学院,浙江嘉兴314033 [3]浙江嘉民塑胶有限公司,浙江嘉兴314027

出　　处：《中国塑料》2011年第6期34-37,共4页China Plastics

摘　　要：以三羟基丙烷和二羟甲基丙酸为原料,缩聚反应制备了超支化聚酯(HBPE),并制备了酚醛树脂/HBPE(PF/HBPE)共混体系。采用红外光谱、差示扫描量热分析等方法表征了HBPE的分子结构和PF/HBPE共混体系的性能,并用非模型等转化率法Flynn-Wall-Ozawa(FWO)描述了PF/HBPE共混体系的活化能与转化率之间的关系。结果表明,由于PF的酚羟基和HBPE的羟基产生了氢键作用,PF/HBPE共混体系显示出单一的玻璃化转变温度,HBPE的加入,提高了PF固化物的冲击强度和弯曲强度,当HBPE的含量为15%时,冲击强度和弯曲强度分别为4.5 kJ/m2和77.84 MPa。Hyperbranched polyester （HBPE） was synthesized via condensation polymerization of tri- ethytolpropane and 2, 2-is（hydroxymethyl） propionic acid, which was used to modify phenolic resins（PF）. The structure and thermal property of the blend were characterized with FTIR and differential scanning calorimetry （DSC）, a relation between the effective activation energy and the fractional conversion during the curing was determined using a model-free isoconversional method, viz, Flynn-Wall-Ozawa （FWO） method. Due to intermolecular hydrogen bonding between hydroxyl groups of HBPE and PF, a single glass transition was Observed. The impact and bend strengths of PF were increased with the addition of HBPE, reached 4. 5 kl/m^2 and 77.84 MPa. respectively.

关 键 词：超支化聚酯 酚醛树脂 改性 制备 固化性能 

分 类 号：TQ323.1[化学工程—合成树脂塑料工业]