中国塑料 ›› 2011, Vol. 25 ›› Issue (06): 34-37 .DOI: 10.19491/j.issn.1001-9278.2011.06.007

• 材料与性能 • 上一篇    下一篇

超支化聚酯改性酚醛树脂的制备与固化性能研究

王松松 周大鹏 谷俐 李坚 俞立琼   

  1. 常州大学材料科学与工程学院 嘉兴学院生物与化工学院 常州大学材料科学与工程学院
  • 收稿日期:2011-03-09 修回日期:2011-04-04 出版日期:2011-06-26 发布日期:2011-06-26

Preparation and Cure Kinetics of Hyperbranched Polyester Modified Phenolic Resins

Song-song WANG Da-peng ZHOU li GU Jian LI Li-qiong YU   

  • Received:2011-03-09 Revised:2011-04-04 Online:2011-06-26 Published:2011-06-26

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。

关键词: 超支化聚酯, 酚醛树脂, 改性, 固化动力学

Abstract: Hyperbranched polyester (HBPE) was synthesized via condensation polymerization of triethylolpropane 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 kJ/m2 and 77.84 MPa, respectively.

Key words: hyperbrached polyester, phenolic resins, modify, curing kinetics