热引发前线聚合法快速制备蒙脱土/环氧树脂复合材料
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摘要
采用热引发前线聚合法(TFP)快速制备了蒙脱土/环氧树脂纳米复合材料,研究了填料含量对前线聚合反应的前线推动速率Vf和最高前线温度Tmax的影响,并通过使用傅里叶红外光谱(FTIR)、X射线衍射(XRD)和力学性能测试等手段对不同固化物的性能与结构进行测试和表征。结果表明:不同体系的前线推动速率和最高前线温度均随蒙脱土含量的增大而变小;采用TFP法使蒙脱土/环氧树脂复合体系完全固化;蒙脱土在固化物中实现了插层或剥离,对基体树脂具有较好的增韧作用。
Thermal frontal polymerization(TFP) was used to cure epoxy resin-montmorillonite nanocomposites. The effect of the amount of montmorillonite on the frontal velocity and maximum frontal temperature was investigated. The structure and properties of the cured products were characterized with FTIR and XRD analysis. The results show that, both the frontal velocity and the frontal temperature decreased with the increase of MMT content. The cured products obtained by the TFP method were nearly completely cured. MMT were found to be intercalated or exfoliated, showing an excellent toughing effect to the matrix.
Thermal frontal polymerization(TFP) was used to cure epoxy resin-montmorillonite nanocomposites. The effect of the amount of montmorillonite on the frontal velocity and maximum frontal temperature was investigated. The structure and properties of the cured products were characterized with FTIR and XRD analysis. The results show that, both the frontal velocity and the frontal temperature decreased with the increase of MMT content. The cured products obtained by the TFP method were nearly completely cured. MMT were found to be intercalated or exfoliated, showing an excellent toughing effect to the matrix.
引文
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[20]Zhou J P,Jia S J,Fu W L,et al. Fast curing of thick components of epoxy via modified UV-triggered frontal polymerization propagating horizontally[J]. Materials Letters,2016,176:228–231.
[2]Mohanty A,Srivastava V K. Dielectric breakdown performance of alumina/epoxy resin nanocomposites under high voltage application[J].Materials&Design,2013,47:711–716.
[3]Alassafi S,De Bruijn N,Aljumaily A M,et al. Processing and characterization of PMMA nanofiber reinforced epoxy composites[J].World Journal of Nano Science and Engineering,2016,6(2):58–63.
[4]Bayani M,Ehsani M,Khonakdar H A,et al. An investigation of TiO2 nanoparticles effect on morphology,thermal,and mechanical properties of epoxy/silica composites[J]. Journal of Vinyl and Additive Technology,2017,23:216–221.
[5]Nayak R K,Dash A,Ray B C,et al. Effect of epoxy modifiers(Al2O3/SiO2/TiO2)on mechanical performance of epoxy/glass fiber hybrid composites[J]. Procedia Materials Science,2014,115(7):1359–1364.
[6]Chen S,Sui J J,Chen L,et al. Polyurethane-nanosilica hybrid nanocomposites synthesized by frontal polymerization[J]. Journal of Polymer Science Part A:Polymer Chemistry,2005,43(8):1670–1680.
[7]Valeria A,Daniele N,Alberto M,et al. Graphene-containing thermoresponsive nanocomposite hydrogels of poly(N-isopropylacrylamide)prepared by frontal polymerization[J]. Journal of Materials Chemistry,2011,21(24):8727–8733.
[8]Sergio S,Valeria A,Alberto M. Thermoresponsive super water absorbent hydrogels prepared by frontal polymerization[J]. Journal of Polymer Science Part A:Polymer Chemistry,2010,48(11):2486–2490.
[9]Guo X,Chen L,Chen S,et al. Fast synthesis of versatile nanocrystal-embedded hydrogels toward the sensing of heavy metal ions and organoamines[J]. Journal of Materials Chemistry,2011,21(4):1124–1129.
[10]Sergio S,Valeria A,Alberto M. Thermoresponsive super water absorbent hydrogels prepared by frontal polymerization of N-isopropyl acrylamide and 3-sulfopropyl acrylate potassium salt[J].Journal of Polymer Science Part A:Polymer Chemistry,2011,49(5):1228–1234.
[11]Roberta S,Valeria A,Alberto M. Polymer hydrogels of 2-hydroxyethyl acrylate and acrylic acid obtained by frontal polymerization[J].Journal of Polymer Science Part A:Polymer Chemistry,2012,50(8):1515–1520.
[12]Zhou Z F,Yu C,Chen S. Facile access to poly(NMA-co-VCL)hydrogels via long range laser ignited frontal polymerization[J]. Journal of Materials Chemistry A,2013,1(25):7326–7331.
[13]吴校彬,傅和青,黄洪,等.聚氨酯-丙烯酸酯的前端自由基聚合[J].化工学报,2007,58(6):1581–1586.
[14]燕青芝,宿新泰,张文峰,等.波聚合制备淀粉接枝丙烯酸钠-丙烯酰胺高吸水性树脂[J].高等学校化学学报,2005,26(7):1363–1365.
[15]陈苏,丰沧,眭建军. PU/纳米SiO2溶胶杂化材料的前端聚合研究[J].高分子学报,2005,1(1):1–3.
[16]Pojman J A,Ilyashenko V M,Khan A M,et al. Free-radical frontal polymerization:self-propagating thermal reaction waves[J]. Journal of the Chemical Society,Faraday Transactions,1996,92(16):2825–2837.
[17]Russoy S,Boulares A,Mariani A. Synthesis of hyperbranched aromatic polyamides by direct polycondensation[J]. Macromolecular Symposia,1998,128(1):13–20.
[18]Mariani A,Alzari V,Monticelli O,et al. Polymeric nanocomposites containing polyhedral oligomeric silsesquioxanes prepared via frontal polymerization[J]. Journal of Polymer Science Part A:Polymer Chemistry,2010,45(19):4514–4521.
[19]周建萍,赵海芳,伍辉儒,等.热引发前线聚合法固化脂环族环氧树脂[J].化工学报,2014,65(8):3283–3289.
[20]Zhou J P,Jia S J,Fu W L,et al. Fast curing of thick components of epoxy via modified UV-triggered frontal polymerization propagating horizontally[J]. Materials Letters,2016,176:228–231.