刘程

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研究员

博士生导师

硕士生导师

任职 : 高分子材料系副系主任

性别:男

毕业院校:大连理工大学

学位:博士

所在单位:化工学院

学科:高分子材料. 高分子化学与物理. 功能材料化学与化工

办公地点:大连理工大学西部校区化工实验楼A407室

联系方式:Tel.: 0411-84986191

电子邮箱:liuch1115@dlut.edu.cn

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Magnolol-based bio-epoxy resin with acceptable glass transition temperature, processability and flame retardancy

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论文类型:期刊论文

发表时间:2020-05-01

发表刊物:CHEMICAL ENGINEERING JOURNAL

收录刊物:EI、SCIE

卷号:387

ISSN号:1385-8947

关键字:Magnolol; Biomass; Epoxy resin; Intrinsic flame retardancy; High performance

摘要:Development of sustainable bio-based epoxy resins having better comprehensive properties than available petroleum-based epoxy resins is of paramount importance for alleviation of energy pressure and enrichment of the potent category of high-performance epoxy resins. In this study, a fully bio-based epoxy resin precursor (DGEM) was synthesized from a naturally occurring magnolol through a highly efficient one step process. The bio-based epoxy resin obtained was then cured with 4, 4'-diaminodiphenyl sulfone (DDS) and compared to the petroleum-based commercial diglycidylether of bisphenol A (DGEBA). After curing with DDS, DGEM/DDS showed higher glass transition temperature than DGEBA/DDS which was 279 degrees C and 231 degrees C, respectively. The char yield (in N-2), storage modulus and flexural modulus of the former were 1.9-fold, 47.5%, and 41.3% higher than those of the latter, respectively. Interestingly, bio-based epoxy resin of DGEM exhibited excellent processability with extremely low viscosity of 0.155 Pa.s at room temperature and a broader processing window than DGEBA/DDS as well. To exhibit such an excellent processability is very rare for high-performance epoxy resins. In addition, the cured DGEM/DDS also showed outstanding intrinsic flame retardancy, which passed the V-0 rate of UL-94 test. This study offers an opportunity to prepare bio-based epoxy resins with better properties than DGEBA and exhibits great promise in cuffing-edge applications.