摘要
采用同步IPN方法,制备了不同组成比例的环氧树脂/苯并噁嗪的完全IPN体系。所制得的复合材料被制成测试样条并测定了各项力学性能。利用差示扫描量热仪(DSC)表征其固化过程中的热力学行为后以Kissinger、Ozawa和Crane方程计算了该类型IPN体系固化反应中的平均活化能、固化反应级数。研究结果表明,随着环氧树脂加量的增大,体系的韧性得到显著提高。当环氧树脂加量为40%时,该IPN体系的弯曲强度增加到98. 2 MPa,弯曲模量下降到4. 04 MPa。相比于原始苯并噁嗪树脂79. 31 MPa的弯曲强度和4. 71 MPa的弯曲模量,环氧树脂/苯并噁嗪树脂的IPN体系在力学性能上呈现出由"硬"变"软"的趋势。固化动力学分析表明,IPN复合体系的固化交联反应表观活化能更低,且始终是简单一级反应。
This article applied Interpenetrating Polymer Network(IPN)technology to prepare complete epoxy resin/benzoxazine IPN system.The obtained composite material were processed to testing specimens and the mechanical properties were measured.Differential scanning calorimeter(DSC)was used to characterize the thermodynamic behaviors of the composite.The data obtained from DSC results was used in Kissinger,Ozawa and Crane equation to calculate the average activation energy,reaction order in the curing reaction of the composite.Research results showed that the toughness of the composite increased with the adding of epoxy resin.When the content of epoxy resin increased to 40%,the bending strength and bending modulus were changed to 98.2 MPa and 4.04 MPa,respectively.Compared with the bending strength and bending modulus of pure polybenzoxazine with the value of 79.31 MPa and 4.71 MPa,respectively,the IPN system showed a tendency to change from hard to soft.The analysis of curing kinetics indicated that the curing reaction had much lower apparent activation energy than before,and it was always a simple first-order reaction.
作者
吕钧炜
王斌
李辉
LV Jun-wei;WANG Bin;LI Hui(School of Material Science and Technology,Southwest Petroleum University,Chengdu 610500,China;High-Tech Organic Fibers Key Laboratory of Sichuan Province,Chengdu 610000,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu 610500,China)
出处
《玻璃钢／复合材料》
CSCD
北大核心
2018年第11期31-36,共6页
Fiber Reinforced Plastics/Composites
基金
四川省重点研发计划军民融合科技创新项目(2018GZ0488)
四川省高校油气田材料重点实验室基金(201810615105)
