原子灰固化体系及固化温度的初探
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摘要
采用过氧化苯甲酰(BPO)和过氧化甲乙酮(MEKP)两种固化体系对原子灰(不饱和聚酯树脂)进行固化和差示扫描量热(DSC)测试,考察了原子灰的固化性能、固化程度以及低温敏感性。结果表明,在BPO–DMA(N,N-二甲基苯胺)体系中引入异辛酸钴[Co(Ⅱ)]后,原子灰的固化快,表干好,附着力优,温度敏感性低。当BPO–DMA–Co(Ⅱ)固化体系中促进剂DMA与Co(Ⅱ)的质量比为1∶1时,原子灰的固化过程放热快,转化率高,固化时间短,固化后的打磨性较佳。
An unsaturated polyester resin putty was cured by two curing systems, i.e. benzoyl peroxide(BPO) and methyl ethyl ketone peroxide(MEKP), and tested by differential scanning calorimetry(DSC). The curing performance, curing degree, and low-temperature sensitivity of the putty were examined. The results showed that the introduction of cobalt bis(2-ethylhexanoate), coded as Co(Ⅱ), into the BPO–DMA(N,N-dimethylaniline) system made the putty fast curing, good surface dryness, excellent adhesion, and less temperature sensitivity. The putty using a BPO–DMA–Co(Ⅱ) curing system with a mass ratio of 1:1 for the promoters DMA and Co(Ⅱ) had the following properties: fast heat release rate in the curing process, high conversion rate, short solidification time, and good polishability after being solidified.
An unsaturated polyester resin putty was cured by two curing systems, i.e. benzoyl peroxide(BPO) and methyl ethyl ketone peroxide(MEKP), and tested by differential scanning calorimetry(DSC). The curing performance, curing degree, and low-temperature sensitivity of the putty were examined. The results showed that the introduction of cobalt bis(2-ethylhexanoate), coded as Co(Ⅱ), into the BPO–DMA(N,N-dimethylaniline) system made the putty fast curing, good surface dryness, excellent adhesion, and less temperature sensitivity. The putty using a BPO–DMA–Co(Ⅱ) curing system with a mass ratio of 1:1 for the promoters DMA and Co(Ⅱ) had the following properties: fast heat release rate in the curing process, high conversion rate, short solidification time, and good polishability after being solidified.
引文
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[2]李德东.提高原子灰综合性能的研究[J].表面技术,2010,39(3):97-99.
[3]张育波,冯兆华.气干型不饱和聚酯树脂的合成及其在原子灰腻子上的应用[J].涂料技术与文摘,2016,37(3):29-32,45.
[4]李凤起,朱书全,李淑琴.提高过氧化甲乙酮收率和稳定性的研究[J].热固性树脂,2000,15(2):18-20.
[5]STOREY R F,SMITH D L.Improved room-temperature cure of unsaturated polyester resins[J].Modern Plastics,1984,61(12):458-465.
[6]LI L,CAO X,LEE L J.Effect of dual-initiator on low temperature curing of unsaturated polyester resins[J].Polymer,2004,45(19):6601-6612.
[7]JONES F R.Chapter 26-Unsaturated Polyester Resins[M]//GILBERT M.Brydson’s Plastics Materials.8th ed.London:Butterworth-Heinemann Publishing,2017:743-772.
[8]FINK J K.1-Unsaturated Polyester Resins[M]//Reactive Polymers Fundamentals and Applications:A Concise Guide to Industrial Polymers.3rd ed.Norwich,NY:William Andrew Publishing,2018:1-69.
[9]刘方方,袁学会.不饱和聚酯树脂BPO/DMA/MHPT固化体系的研究[J].粘接,2016(2):40-42.
[10]陈剑楠,李玲,董凤云.不饱和聚酯树脂BPO/DMA固化体系的研究[J].应用化工,2006,35(3):206-207.
[11]张伟民,李玉学,刘朔,等.芳叔胺促进剂对不饱和聚酯树脂固化的研究[J].中国塑料,2001,15(8):70-73.
[12]李建国.拉挤用乙烯基酯树脂的固化行为及固化反应动力学研究[D].北京:北京化工大学,2003.
[13]王聪彩.UPR的固化动力学及固化树脂结构表征[D].天津:天津大学,2014.
[14]高峰,周菊兴.合成空干性不饱和聚酯树脂的评述[J].热固性树脂,1997,12(1):37-43.
[15]陈勤,陈运泉.气干性不饱和聚酯树脂的配方研究[J].贵州化工,2001,26(2):8-10.
[16]蒋海青,严玉,王晓钧,等.非等温DSC法研究不饱和聚酯树脂/淤泥体系固化反应动力学[J].玻璃钢/复合材料,2010(4):33-36,61.