聚丙烯酸酯/聚氨酯/SiO_2纳米复合黏合剂的细乳液法制备及其粘接性能
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摘要
以表面乙烯基修饰的SiO_2纳米粒子为无机组分,以丙烯酸异辛酯、甲基丙烯酸甲酯、甲基丙烯酸和甲基丙烯酸2-羟乙酯为自由基共聚单体,以异氟尔酮二异氰酸酯和聚己内脂二醇为聚氨酯(PU)预聚单体,采用细乳液聚合法一步制备聚丙烯酸酯(PAcr)/PU/SiO_2纳米复合黏合剂,同时以细乳液聚合法制备的PAcr和PAcr/PU黏合剂作为参照。利用动态光散射、红外光谱、力学性能测试和差示扫描量热等手段对黏合剂的组成、粒子的颗粒特征、粘接性能和热性能等进行表征,系统比较了上述三类黏合剂的差异。结果表明:引入PU和SiO_2组分能显著提升黏合剂的粘接性能,PAcr/PU/SiO_2纳米复合黏合剂胶膜强度最高,初粘力和剥离力间能达到较好的平衡。
In this paper, polyacrylate(PAcr)/polyurethane(PU)/SiO_2 nanocomposite adhesives were conveniently prepared with miniemulsion polymerization method by using SiO_2 nanoparticles modified with surface vinyl as the inorganic component, isooctyl acrylate, methyl methacrylate, methacrylic acid, and 2-hydroxyethyl methacrylate as the free radical comonomers, isoflurone diisocyanate and polycaprolactone glycol as the PU pre-polymerized monomers. Meanwhile, PAcr and PAcr/PU adhesives prepared with miniemulsion polymerization method were used as the reference adhesives. The composition, particle features, bonding performance and thermal performance of the above three kinds of adhesives were characterized by dynamic light scattering, Fourier transform infrared spectroscopy, mechanical properties test, and differential scanning calorimetry. At the same time, their differences were systematically compared. The results indicated that, the adhesive performance of PAcr/PU/SiO_2 nanocomposite adhesive was significantly improved by introducing PU and SiO_2. The PAcr/PU/SiO_2 nanocomposite adhesives displayed the highest film strength, and its initial adhesion and peeling force could reach a good balance.
In this paper, polyacrylate(PAcr)/polyurethane(PU)/SiO_2 nanocomposite adhesives were conveniently prepared with miniemulsion polymerization method by using SiO_2 nanoparticles modified with surface vinyl as the inorganic component, isooctyl acrylate, methyl methacrylate, methacrylic acid, and 2-hydroxyethyl methacrylate as the free radical comonomers, isoflurone diisocyanate and polycaprolactone glycol as the PU pre-polymerized monomers. Meanwhile, PAcr and PAcr/PU adhesives prepared with miniemulsion polymerization method were used as the reference adhesives. The composition, particle features, bonding performance and thermal performance of the above three kinds of adhesives were characterized by dynamic light scattering, Fourier transform infrared spectroscopy, mechanical properties test, and differential scanning calorimetry. At the same time, their differences were systematically compared. The results indicated that, the adhesive performance of PAcr/PU/SiO_2 nanocomposite adhesive was significantly improved by introducing PU and SiO_2. The PAcr/PU/SiO_2 nanocomposite adhesives displayed the highest film strength, and its initial adhesion and peeling force could reach a good balance.
引文
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[2] Barbour M.Waterborne & solvent based acrylics and their end user applications[M].New York:Wiley,1996:142-149.
[3] Daniloska V,Carretero P,Tomovska R,et al.High-performance adhesives resulting from spontaneous formation of nanogels within miniemulsion particles[J].ACS Applied Materials & Interfaces,2014,6(5):3559-3567.
[4] Udagama R,Degrandi-Contraires E,Creton C,et al.Synthesis of acrylic-polyurethane hybrid latexes by miniemulsion polymerization and their pressure-sensitive adhesive applications[J].Macromolecules,2011,44(8):2632-2642.
[5] Lopez A,Degrandi-Contraires E,Canetta E,et al.Waterborne polyurethane-acrylic hybrid nanoparticles by miniemulsion polymerization:Applications in pressure-sensitive adhesives[J].Langmuir,2011,27(7):3878-3888.
[6] Khan U,May P,Porwal H,et al.Improved adhesive strength and toughness of polyvinyl acetate glue on addition of small quantities of graphene[J].ACS Applied Materials & Interfaces,2013,5(4):1423-1428.
[7] Daniloska V,Keddie J L,Asua J M,et al.MoS2 nanoplatelet fillers for enhancement of the properties of waterborne pressure-sensitive adhesives[J].ACS Applied Materials & Interfaces,2014,6(24):22640-22648.
[8] Diaconu G,Micusik M,Bonnefond A,et al.Macroinitiator and macromonomer modified montmorillonite for the synthesis of acrylic/MMT nanocomposite latexes[J].Macromolecules,2009,42(9):3316-3325.
[9] 吴立霞,许戈文,黄毅萍.聚氨酯-丙烯酸酯/纳米SiO2核壳型乳液的合成及表征[J].精细化工,2013,30(10):1086-1091.
[10] St?ber W,Fink A,Bohn E.Controlled growth of monodisperse silica spheres in the micron size range[J].Journal of Colloid and Interface Science,1968,26(1):62-69.
[11] 陈群.含SiO2的细乳液聚合体系中纳米复合粒子形成效率和颗粒特征的调控[D].杭州:浙江理工大学,2017:28-29.
[12] Degrandi-Contraires E,Lopez A,Reyes Y,et al.High-shear-strength waterborne polyurethane/acrylic soft adhesives[J].Macromolecular Materials and Engineering,2013,298(6):612-623.
[13] Fei G,Yan T,Wang H,et al.Micromorphology,phase behavior,and properties of environmental,multi-cross-linked polyurethane/polyacrylate microemulsions based on in situ surfactant-free polymerization[J].Colloid and Polymer Science,2017,295(10):1743-1755.