FRONTAL CURING OF EPOXY RESIN AND ITS COMPOSITE BY UV RADIATION

Abstract

Abstract: UV-induced frontal curing behaviors of epoxy resin systems including not only the photoinitiator but also the thermal initiator were studied. Increase of the content of thermal initiator can increase frontal rate obviously. The frontal curing of CEP/PBMA semi-IPN systems were also studied. Compared with pure epoxy resin, the frontal rate of semi-IPN is lower. Without the thermal initiator, the front propagating of the semi-IPN can not be sustained. TG and DSC results show that the beginning degradation temperature and glass transition temperature decrease with the increase of the BMA weight percent. Carbon fiber fabric reinforced composite materials based on epoxy resin systems were prepared successfully using UV radiation. The epoxy resin matrixes include pure epoxy and EP/PBMA semi-IPN systems. According to the tensile testing results, with the increase of BMA weight percent, the tensile strength of composite decreases gradually.

Key words: frontal polymerization, epoxy resin, UV-cured composite materials, interpenetrating polymer networks (IPNs)

CLC Number:

TB332

ZHAO Pei-zhong, TAN Xiao-ming, DAI Jing-tao. FRONTAL CURING OF EPOXY RESIN AND ITS COMPOSITE BY UV RADIATION[J]. Composites Science and Engineering, 2020, 0(5): 112-116.

References

[1] Yagci Y, Jockusch S, Turro N J. Photoinitiated polymerization: advances, challenges, and opportunities[J]. Macromolecules, 2010, 43: 6245-6260.
[2] Decker C, Bianchi C. Ultrafast hardening of a modelling paste by UV-curing of a polyamide ﬁlled acrylic resin[J]. Journal of Materials Science, 2005, 40: 5491-5497.
[3] Maag K, Lenhard W, Loffles H. New UV curing systems for automotive applications[J]. Progress in Organic Coatings, 2000, 40: 93-97.
[4] Stephenson N, Kriks D, El-Maazawi M, et al. Spatial and temporal evolution of the photo initiation rate for thick polymer systems illuminated on both sides[J]. Polymer International, 2005, 54: 1429-1439.
[5] Kenning N S, Ficek B A, Hoppe C C. Spatial and temporal evolution of the photoinitiation rate for thick polymer systems illuminated by polychromatic light: selection of efficient photoinitiators for LED or mercury lamps[J]. Polymer International, 2008, 57: 1134-1140.
[6] Baikerikar K K, Scranton A B. Photopolymerizable liquid encapsulants for microelectronic devices[J]. Polymer, 2001, 42: 431-441.
[7] Baikerikar K K, Scranton A B. Photopolymerizable liquid encapsulants for microelectronic devices: thermal and mechanical properties of systems with reduced in-mold cure times[J]. Journal of Applied Polymer Science, 2001, 81: 3449-3461.
[8] Nason C, Roper T, Hoyle C, et al. UV-Induced frontal polymeriza-tion of multifunctional (meth) acrylates[J]. Macromolecules, 2005, 38: 5506-5512.
[9] Pojman J A. Frontal Polymerization[M]. Matyjaszewski K, Möller M. Polymer Science: A Comprehensive Reference. Amsterdam: Elsevier BV, 2012: 957-980.
[10] Crivello J V, Liu S S. Synthesis and cationic photopolymerization of monomers based on nopol[J]. Journal of Polymer Science: Part A: Polymer Chemistry, 1999, 37: 1199-1209.
[11] Rajaraman S K, Mowers W A, Crivello J V. Interaction of epoxy and vinyl ethers during photoinitiated cationic polymerization[J]. Journal of Polymer Science: Part A: Polymer Chemistry, 1999, 37: 4007-4018.
[12] Bi Y, Neckers D C. A visible light initiating system for free radical promoted cationic polymerization[J]. Macromolecules, 1994, 27: 3683-3693.
[13] Mariani A, Bidall S, Fiori S. UV-ignited frontal polymerization of an epoxy resin[J]. Journal of Polymer Science: Part A: Polymer Chemistry, 2004, 42: 2066-2072.
[14] Li G, Pourmohamadian N, Cygan A. Fast repair of laminated beams using UV curing composites[J]. Composite Structures, 2003, 60: 73-91.
[15] Li G, Ghebreyesus A. Fast repair of damaged RC beams using UV curing FRP composites[J]. Composite Structures, 2006, 72: 105-110.
[16] Peck J A, Li G, Pang S. Light intensity effect on UV cured FRP coupled composite pipe joints[J]. Composite Structures, 2004, 64: 539-546.
[17] Compston P, Schiemer J, Cvetanovska A. Mechanical properties and styrene emission levels of a UV-cured glass-fibre/vinylester composite[J]. Composite Structures, 2008, 86: 22-26.
[18] 王忠刚, 刘万双, 赵琳妮, 等.高性能脂环族环氧树脂分子设计与合成研究进展[J]. 高分子通报, 2011(9): 13-21.