原位聚合制备热塑性环氧树脂及其复合材料性能的研究
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摘要
实验制备了一种新型的热塑性环氧树脂基复合材料,该热塑性聚合物基复合材料是由环氧树脂、双马来酰亚胺树脂、一元胺的混合物浸渍增强材料并原位聚合制得的。通过将聚合好的树脂浸入有机溶剂中,发现树脂溶解于溶剂中,表明该树脂基体没有交联。利用示差扫描量热法(DSC)、红外光谱法(FTIR)研究了树脂体系的聚合制度,利用DSC和同步热分析仪研究了该体系的耐热性。采用电子万能材料实验机研究了复合材料的力学性能。结果表明,最佳的聚合制度为70℃/1 h+120℃/2 h+150℃/5 h+170℃/2 h。双马来酰亚胺树脂的加入能有效改善体系的玻璃化转变温度(Tg)。当其含量达到10%时,Tg达到90℃,与不添加双马来酰亚胺的树脂体系相比,玻璃化转变温度提高了36%。
In this paper,a novel thermoplastic epoxy composite was prepared by impregnating a reinforcing material with a mixture of epoxy resin,bismaleimide resin and monoamine. By immersing the cured resin in an organic solvent,it was found that the resin was dissolved in the solvent,indicating that the resin matrix was not crosslinked.The curing system of the resin system was studied by differential scanning calorimetry( DSC) and infrared spectroscopy( FTIR). The heat resistance of the system was studied by DSC and synchronous thermal analyzer. The mechanical properties of the composites were studied by using an electronic universal material testing machine. The results showed that the best curing system was 70 ℃/1 h+120 ℃/2 h+150 ℃/5 h+170 ℃/2 h. The addition of bismaleimide resin could effectively improve the glass transition temperature of the system. When the content reached10%,the Tgcould reach 90 ℃ and the glass transition temperature was increased by 36% compared to the system in which no bismaleimide resin was added.
In this paper,a novel thermoplastic epoxy composite was prepared by impregnating a reinforcing material with a mixture of epoxy resin,bismaleimide resin and monoamine. By immersing the cured resin in an organic solvent,it was found that the resin was dissolved in the solvent,indicating that the resin matrix was not crosslinked.The curing system of the resin system was studied by differential scanning calorimetry( DSC) and infrared spectroscopy( FTIR). The heat resistance of the system was studied by DSC and synchronous thermal analyzer. The mechanical properties of the composites were studied by using an electronic universal material testing machine. The results showed that the best curing system was 70 ℃/1 h+120 ℃/2 h+150 ℃/5 h+170 ℃/2 h. The addition of bismaleimide resin could effectively improve the glass transition temperature of the system. When the content reached10%,the Tgcould reach 90 ℃ and the glass transition temperature was increased by 36% compared to the system in which no bismaleimide resin was added.
引文
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[2]Stewart R.Automotive composites offer lighter solutions[J].Reinforced Plastics,2010,54(2):22-28.
[3]Marsh,George.Composites poised to transform airline economics[J].Reinforced Plastics,2013,57(3):18-24.
[4]Jürgen K,Rothmann D.Carbon composite materials in modern yacht building[J].Reinforced Plastics,2010,54(4):24-27.
[5]Brady P.Technology developments in automotive composites[J].Reinforced Plastics,2010,54(6):25-29.
[6]Halawani N,Aug J L,Morel H,et al.Electrical,thermal and mechanicalproperties of poly-etherimide epoxy-diamine blend[J].Composites Part B,2017,110:530-541.
[7]Dogan A,Arikan V.Low-velocity impact response of E-glass reinforced thermosetand thermoplastic based sandwich composites[J].Composites Part B,2017,127:63-69.
[8]D″Hooghe E L,Edwards C M.Thermoplastic composite technology;tougher than you think[J].Advanced Materials,2000,12(23):1865-1868.
[9]Imanishi T,Nishida H,Hirayama N,et al.In situ polymerizablethermoplastic epoxy resin and high performance FRTP using it and fiberfabrics[C]//In:Proceedings of 16th ICCM.2007:194-195.
[10]Hirayama N,Tomomitsu N,Nishida H,et al.Development of fiberreinforced plastic with a novel reversibly fusible epoxy resin[J].Reinf Plast,2004,50:519-524.
[11]Nishida H,Carvelli V,Fujii T,et al.Quasi-static and fatigue performance of carbon fibre reinforced highly polymerized thermoplastic epoxy[J].Composites Part B:Engineering,2018,144:163-170.
[12]Naito K,Oguma H.Tensile properties of novel carbon/glass hybrid thermoplastic composite rods[J].Composite Structures,2017,161:23-31.
[13]Taniguchi N,Nishiwaki T,Hirayama N,et al.Dynamic tensile properties of carbon fiber composite based on thermoplastic epoxy resin loaded in matrix-dominant directions[J].Composites Science&Technology,2009,69(2):207-213.
[14]Hardis R,Jessop J L P,Peters F E,et al.Cure kinetics characterization and monitoring of an epoxy resin using DSC,Raman spectroscopy,and DEA[J].Composites Part A Applied Science&Manufacturing,2013,49(49):100-108.
[15]韩俊华,吕建,徐晓伟,等.环氧粉末涂料的固化动力学和固化工艺的研究[J].热固性树脂,2010,25(3):1-5.
[16]Hong S G,Wu C S.DSC and FTIR analyses of the curing behavior of epoxy/dicy/solvent systems on hermetic specimens[J].Journal of Thermal Analysis&Calorimetry,2000,59(3):711-719.
[17]陈平,王德中.环氧树脂及其应用[M].北京:化学工业出版社,2004.