發(fā)布時間：2018-11-20 06:17

【摘要】：近年來,國內(nèi)外對于環(huán)氧樹脂的研究進展迅速,傳統(tǒng)的環(huán)氧樹脂盡管有十分優(yōu)秀的理化性能,但仍然存在一些缺陷,不足以滿足工業(yè)生產(chǎn)及應(yīng)用的需要,故對其性能的改善優(yōu)化成為了現(xiàn)今的發(fā)展趨勢[1-4]。為了克服環(huán)氧樹脂的性脆和不耐高溫等缺點,本文通過用籠型八聚倍半硅氧烷雜化物對環(huán)氧樹脂改性,用來優(yōu)化雙酚A型環(huán)氧樹脂的熱學(xué)性能和機械性能,系統(tǒng)研究了新合成的雜化物的性質(zhì)及其對雙酚A型環(huán)氧樹脂性能的影響。以自制的POSS-NH2為原料,按照順序比例(1:6至1:14)依次加入對-甲苯基縮水甘油醚(TGE),通過開環(huán)反應(yīng)合成了一類新型有機/無機醚類雜化物PTGE;在POSS-NH2中按照順序比例(1:5至1:8)分別加入苯甲醛(BA)、對-二甲氨基苯甲醛(DABA),由于胺基與醛基易發(fā)生縮聚反應(yīng),分別得到亞胺類雜化物PBA、PDABA。通過溶解性測試、紅外光譜、核磁氫譜熱重分析等性能表征,對以上產(chǎn)物進行研究分析。將第一類醚類雜化物PTGE以不同的質(zhì)量分數(shù)(5%-20%)添加至雙酚A型環(huán)氧樹脂中,制備一種新型的有機/無機雜化物改性環(huán)氧樹脂復(fù)合材料。復(fù)合材料經(jīng)固化后,通過研究其固化時間和溫度,測試拉伸強度、斷裂伸長率、沖擊強度、差示掃描量熱、熱重等分析,選擇最佳制備條件,并通過XRD、SEM等測試研究其內(nèi)部結(jié)構(gòu)的變化。將第二類亞胺類雜化物PBA、PDABA分別以不同的質(zhì)量分數(shù)添加至雙酚A型環(huán)氧樹脂中,同時制備出兩種新型復(fù)合材料。由于PBA、PDABA是固體粉末,需對其在環(huán)氧樹脂的溶解能力進行優(yōu)化條件的研究。確定固化工藝后,通過熱重、差示掃描量熱、拉伸強度、沖擊強度等熱力學(xué)性能方面來比較,研究亞胺類雜化物內(nèi)部結(jié)構(gòu)的不同對環(huán)氧樹脂改性的影響,最后篩選出最佳制備條件及添加量。
[Abstract]:In recent years, the research on epoxy resin has made rapid progress at home and abroad. Although the traditional epoxy resin has excellent physical and chemical properties, it still has some defects, which is not enough to meet the needs of industrial production and application. Therefore, the improvement and optimization of its performance has become the current trend of development [1-4]. In order to overcome the shortcomings of epoxy resin such as brittleness and high temperature resistance, the epoxy resin was modified by caged octasiloxane hybrid, which was used to optimize the thermal and mechanical properties of bisphenol A epoxy resin. The properties of the newly synthesized hybrid and its effect on the properties of bisphenol A epoxy resin were systematically studied. A novel organic / inorganic ether hybrid PTGE; was synthesized by ring-opening reaction of p-toluenyl glycidyl ether (TGE),) by adding p-toluene glycidyl ether (TGE),) in order of order (1:6 to 1:14) using self-made POSS-NH2 as raw material. In POSS-NH2, benzaldehyde (BA), p-Dimethylaminobenzaldehyde (DABA),) was added in an orderly proportion (1:5 to 1:8) to obtain imine hybrid PBA,PDABA. due to the easy condensation of amine group and aldehyde group. The above products were characterized by solubility test, IR spectrum and NMR thermogravimetric analysis. A novel organic / inorganic hybrid epoxy resin composite was prepared by adding the first kind of ether hybrid PTGE to bisphenol A epoxy resin with different mass fraction (5- 20%). After curing, the best preparation conditions were selected by studying the curing time and temperature, testing tensile strength, elongation at break, impact strength, differential scanning calorimetry, thermogravimetry, etc. The change of internal structure was studied by SEM et al. The second kind of imines hybrid PBA,PDABA was added to bisphenol A epoxy resin with different mass fraction, and two new composite materials were prepared at the same time. As PBA,PDABA is a solid powder, it is necessary to study the optimum conditions of its solubility in epoxy resin. The effects of different internal structures of imines on the modification of epoxy resin were studied by thermogravimetry, differential scanning calorimetry (DSC), tensile strength, impact strength and other thermodynamic properties. Finally, the optimum preparation conditions and addition amount were selected.
【學(xué)位授予單位】：江南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TQ323.5;TB33

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