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Polyester based hybrid organic coatings.

机译：聚酯基杂化有机涂料。

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摘要

Polyesters are a class of polymers widely used in organic coatings applications. In this work, four types of organic coatings based on polyester polyols were prepared: UV-curable polyester/poly(meth)acrylate coatings, thermal curable polyester polyurethane-urea coatings, thermal curable non-isocyanate polyurethane coatings, and UV-curable non-isocyanate polyurethane coatings.;Polyester/poly(meth)acrylate block copolymers are synthesized using a combination of polycondensation and Atom-Transfer Radical Polymerization (ATRP). All block copolymers are characterized by means of Nuclear Magnetic Resonance (NMR) and Gel Permeation Chromatography (GPC). In the case of unsaturated-polyester-based block copolymers the main chain double bond in the polyester backbone remains almost unaffected during ATRP. The unsaturated block copolymers are crosslinkable and can form networks upon photo-irradiation in the presence of a suitable photoinitiator. These copolymers might be interesting candidates for coatings with better overall properties than those based on neat polyesters.;Thermal curable polyester polyol based Polyurethane-Urea (PUU) coatings were formulated using Partially Blocked HDI isocyanurate (PBH), Isophorone Diamine (IPDA), and polyester polyol. As a comparison, the polyurethane coatings (PU) without adding IPDA were also prepared. The mechanical and viscoelastic properties of the PUU and PU coating were investigated by using tensile test and Dynamic Mechanical Thermal Analyzer (DMTA). It was found that PUU coating exhibited higher crosslink density, Tg, tensile modulus and strength than the corresponding PU coating.;Thermal curable non-isocyanate polyurethane coatings were prepared by using polyamine and cyclic carbonate terminated polyester. Cyclic carbonate terminated polyester was synthesized from the reaction of the carbon dioxide and epoxidized polyester which was prepared from the polyester polyol. The properties of the epoxidized and cyclic carbonate terminated polyester were characterized by Brookfield viscometer, NMR and Fourier Transform Infrared spectroscopy (FTIR).;UV-curable non-isocyanate polyurethane coatings were formulated by using Acrylated Polyester (APE) oligomer and Non-isocyanate Urethane Dimethacrylates (NUDMA) reactive diluents. The effect of the NUDMA on the viscosity of the APE oligomer was investigated by Brookfield viscometer. The photopolymerization kinetics of NUDMA reactive diluents were investigated by the real time FTIR. It was found that the polymerization conversion and maximum polymerization rate increase with increasing initiator concentration in the range from 0.5 % to 4.0 %. The formulation system containing both the APE oligomer and NUDMA reactive dilutes showed higher polymerization overall conversion and maximum polymerization rate than APE oligomer.;After UV curing, the viscoelastic, tensile and thermal properties of the cured films were evaluated as a function of the reactive diluent by using DMTA, tensile test, Differential Scanning Calorimeters (DSC), and Thermal Gravimetric Analysis (TGA). In addition, coating properties such as pencil hardness, chemical resistance, impact resistance, and gloss were also investigated. It was found that crosslink density, storage and tensile modulus, pencil hardness, chemical resistance, gel content, total water absorption, and Tg were directly proportional to amount of the reactive diluents. Compared to the commercial Ethylene Glycol Dimethacrylate (EGDMA) reactive diluent, the NUDMA reactive diluents show significant improvements in impact resistance and elongation at break properties.
机译：聚酯是广泛用于有机涂料应用中的一类聚合物。在这项工作中，制备了四种基于聚酯多元醇的有机涂料：紫外线固化聚酯/聚（甲基）丙烯酸酯涂料，热固化聚酯聚氨酯-脲涂料，热固化非异氰酸酯聚氨酯涂料和可紫外线固化的非丙烯酸涂料。聚酯/聚（甲基）丙烯酸酯嵌段共聚物是通过缩聚和原子转移自由基聚合（ATRP）的组合来合成的。所有嵌段共聚物均通过核磁共振（NMR）和凝胶渗透色谱（GPC）进行表征。在不饱和聚酯基嵌段共聚物的情况下，聚酯骨架中的主链双键在ATRP过程中几乎不受影响。不饱和嵌段共聚物是可交联的，并且在合适的光引发剂的存在下在光辐照下可以形成网络。这些共聚物可能是具有比基于纯聚酯的涂料更好的整体性能的涂料的令人感兴趣的候选涂料。热可固化聚酯多元醇基聚氨酯-尿素（PUU）涂料是使用部分嵌段的HDI异氰脲酸酯（PBH），异佛尔酮二胺（IPDA）和聚酯多元醇。作为比较，还制备了不添加IPDA的聚氨酯涂料（PU）。通过使用拉伸试验和动态机械热分析仪（DMTA）研究了PUU和PU涂层的机械和粘弹性。发现PUU涂料比相应的PU涂料具有更高的交联密度，Tg，拉伸模量和强度。通过使用聚胺和环状碳酸酯封端的聚酯制备可热固化的非异氰酸酯聚氨酯涂料。由二氧化碳与由聚酯多元醇制得的环氧化聚酯的反应合成了环状碳酸酯封端的聚酯。用Brookfield粘度计，NMR和傅里叶变换红外光谱（FTIR）表征了环氧化和环状碳酸酯封端的聚酯的性能。通过丙烯酸酯化聚酯（APE）低聚物和非异氰酸酯聚氨酯配制了可紫外固化的非异氰酸酯聚氨酯涂料。二甲基丙烯酸酯（NUDMA）反应性稀释剂。通过布鲁克菲尔德粘度计研究了NUDMA对APE低聚物粘度的影响。通过实时FTIR研究了NUDMA反应性稀释剂的光聚合动力学。发现在引发剂浓度为0.5％至4.0％的范围内，聚合转化率和最大聚合速率增加。包含APE低聚物和NUDMA反应性稀释剂的配方体系显示出比APE低聚物更高的聚合整体转化率和最大聚合速率。; UV固化后，固化膜的粘弹性，拉伸和热性能是反应性稀释剂的函数通过使用DMTA，拉伸试验，差示扫描量热仪（DSC）和热重分析（TGA）。另外，还研究了诸如铅笔硬度，耐化学性，耐冲击性和光泽度的涂层性能。发现交联密度，储能和拉伸模量，铅笔硬度，耐化学性，凝胶含量，总吸水率和Tg与反应性稀释剂的量成正比。与市售的乙二醇二甲基丙烯酸乙二醇酯（EGDMA）反应性稀释剂相比，NUDMA反应性稀释剂在耐冲击性和断裂伸长率方面显示出显着的提高。

著录项

  • 作者

    Wang, Xiaojiang.;

  • 作者单位

    The University of Akron.;

  • 授予单位 The University of Akron.;
  • 学科 Chemistry Polymer.;Engineering Materials Science.
  • 学位 Ph.D.
  • 年度 2012
  • 页码 207 p.
  • 总页数 207
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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