聚酯改性丙烯酸树脂的研制与应用

含活泼双键的聚酯多元醇与丙烯酸酯接枝共聚,制得分子内增的聚酯改性丙烯酸树脂,此种树脂兼有聚酯和丙烯酯树脂的优良性能,并与其他不同入性的丙烯酸树脂的性能进行了对比。     

单组分室温固化型水性丙烯酸接枝氨酯油树脂的研制

油与多元醇经醇解反应,进而与聚醚或聚酯、二羟甲基丙酸、二异氰酸酯反应制得水溶性氨酯油。该氨酯油中引入了羧基阴离子和丙烯酸双键,用有机胺中和后溶于水中。同时加入丙烯酸单体,在水中通过乳液共聚进行接枝反应制得单组分常温固化型水性丙烯酸接枝氨酯油树脂。试验表明,合成的树脂强度、光泽、硬度、贮存稳定性等均优。     

聚酯膜光接枝丙烯酸表面改性无钯化学镀铜

研究了聚酯膜光接枝丙烯酸表面改性化学镀铜。对比气相法光接枝和液相法光接枝,结果表明,使用气相法时丙烯酸可重复利用;使用表面全反射傅立叶变换红外光谱对聚酯膜进行了表征;通过接枝丙烯酸引入羧基,与银离子进行离子交换,能实现无钯活化引发化学镀铜,通过扫描电镜对化学镀铜层表面形貌进行观察。     

丙烯酸与异形聚酯共混纤维接枝共聚研究

以过氧化苯甲酰为引发剂,丙烯酸为单体与碱处理后的异形聚酯共混纤维接枝共聚,井对接枝后的异形聚酯共混纤维进行了结构和性能研究。结果表明:BPO浓度在0．01 moL／L,丙烯酸浓度1．50 mol/L,聚合温度85℃,时间90 min,所获得的接枝率为12％。随着接枝率的上升,热稳定性下降,回潮率增加,抗静电性能增加。     

辐射接枝改性聚酯薄膜表面防雾滴性研究

采用γ射线辐照引发接枝的方法,在聚酯(PET)膜表面接枝丙烯酸、丙烯酰胺、丙烯酸羟乙酯,获得具有表面亲水性的聚酯膜。并研究了不同辐照强度、辐照时间、温度、单体浓度下的接枝规律。结果表明,随着接枝率的上升,PET膜对水接触角逐渐降低,达到一定值后变化不大。     

粉末涂料用丙烯酸改性聚酯树脂的合成研究

采用溶液聚合法,合成了含一定量羧基官能团的丙烯酸树脂预聚体;用熔融聚合法合成了含羟基官能团的聚酯树脂预聚体;通过丙烯酸预聚体上的部分羧基官能团与聚酯预聚体上的羟基官能团发生的酯化反应而将两种预聚物接枝到一起,形成接枝共聚物来改善聚酯与丙烯酸树脂之间的相容性问题。红外、DSC测试表明,丙烯酸预聚物与聚酯预聚物发生了化学交联反应。对丙烯酸改性聚酯树脂制备的粉末涂料涂层性能进行了测试,所配制的涂料涂膜表面光滑无缺陷,无失光现象出现,具有良好的机械性能与耐老化性能。     

聚酯膜的表面接枝改性高锰酸钾-草酸引发聚酯膜表面接枝丙烯酸

在水溶液中用高锰酸钾-草酸引发体系研究聚酯膜表面丙烯酸接枝共聚。讨论了引发剂浓度、单体浓度、反应温度和反应时间对接枝率的影响。用接触角测定仪测定了接枝表面性能。     

聚酯树脂及其涂料

由酸混合物及醇混合物缩聚而得的聚酯树脂及其制备方法和预涂金属底漆用涂料添加剂,丝网印刷法涂装的桌子用不饱和聚酯树脂涂料,丙烯酸接枝不饱和聚酯水性杂化涂料的制备及性能,一种聚酯亚胺漆包线漆的制造方法,一种作为汽车中涂漆的聚酯水分散体及其制备方法,     

丙烯酸酯/含铬蛋白接枝乳液的制备及应用研究

用含铬皮革废弃物制得含铬蛋白液,然后用丙烯酸(酯)类单体与含铬蛋白进行接枝反应,分别制得自乳化和外乳化的蛋白-丙烯酸接枝乳液,研究了它们作为制革复鞣剂的应用效果。使用Zeta电位、高速离心及蒸馏水稀释考察乳液的稳定性,结果显示,外乳化蛋白-丙烯酸乳液的稳定性强于自乳化蛋白-丙烯酸乳液。使用茚三酮显色液和红外光谱,证明了接枝反应的发生,自乳化蛋白-丙烯酸乳液的接枝率(PG)和接枝效率(GE)分别为94.37%和56.62%,外乳化蛋白-丙烯酸乳液的PG和GE分别为113.05%和67.83%。应用试验显示,蛋白-丙烯酸乳液复鞣填充效果明显,自乳化蛋白-丙烯酸乳液增厚效果优于外乳化蛋白-丙烯酸乳液。     

接枝共聚丙烯酸涂料的研究

报道了将丙烯酸单体接枝到合成橡胶上的接枝共聚方法。对接枝母体胶料和丙烯酸单体进行了选择。考查了反应温度、引发剂用量、反应时间和胶用量对接枝共聚反应的影响。比较了相同单体的共聚物和接枝共聚物的性能差别。制得装饰性强、性能优的新型第二代丙烯酸酯涂料。     

丙烯酸改性聚酯水分散体纺织涂层的制备

采用新戊二醇、二甘醇、邻苯二甲酸酐、顺丁烯二酸酐等为原料合成了主链上含有双键的聚酯,然后采用含一定亲水基团的丙烯酸混合单体接枝改性聚酯树脂,提高了聚酯树脂的水溶性和成膜性能.由此制备出一种性能优良的环保型纺织涂层.用红外光谱表征了产物的分子结构.讨论了顺丁烯二酸酐用量及中和剂的选择对水分散体性能的影响.     

Studies on acrylic acid–grafted polyester fabrics by electron beam preirradiation method. I. Effects of process parameters on graft ratio and characterization of grafting products

Polyester fabrics were preirradiated by electron beam in air and then grafted by acrylic acid (AA) without excluding oxygen. Effects of preirradiation dose, monomer concentration, reaction temperature, storage time, sulfuric acid, and Mohr's salt were investigated in detail and are discussed. The results suggest that it is practicable and effective to graft AA onto polyester fabrics by means of the preirradiation method. FTIR and SEM were used to characterize AA‐grafted polyester fabrics. A new band appearing at 1546 cm^?1 in the FTIR spectrum implies that AA was indeed introduced onto PET macromolecules. Changes of the diameter and the surface structure of fabric fibers presented in SEM micrographs make it clear that a layer of grafted poly(acrylic acid) was formed on the surface of these PET fibers. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 3931–3938, 2003     

等离子体诱导PET纤维接枝丙烯酸的研究

利用低温等离子体技术对PET织物在氧气下经等离子处理后生成过氧化物,然后接枝丙烯酸进行研究。通过改变低温等离子体各种处理条件来研究其接枝后织物的吸水性、润湿性等性能变化。随着放电功率的增加、放电时间的延长,PET织物的吸液高度呈现先增大后减小的趋势;随着放电功率的增加,PET织物与去离子水接触角呈现先减小后增大的趋势;随着等离子体放电时间的增加,PET织物与去离子水的接触角迅速减小,然后趋于稳定。经过处理后试样的吸湿率、吸液高度和回潮率均随接枝率的增加而增加,染色性能提高。     

Studies on acrylic acid–grafted polyester fabrics by electron beam preirradiation method. II. Novel intelligent immersion‐resistant and moisture‐permeable fabrics

Moisture regain, water vapor permeability, and water‐impermeable ability of polyester fabrics before and after grafting by acrylic acid (AA) were investigated. The results showed that the AA‐grafted fabric presents novel properties. When it is dry it possesses a higher water vapor transmission rate. Once it comes into contact with water, the grafted poly(acrylic acid) layer on the fibers' surface begins to swell and seals the intervals between fibers and yarns to prevent water from penetrating, a phenomenon known as immersion resistance. This kind of immersion‐resistant and moisture‐permeable fabrics might be a suitable candidate for the immersion‐resistant layer fabrics of Type B immersion‐resistant suits. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 3939–3943, 2003     

Water‐based crosslinkable coatings via miniemulsion polymerization of acrylic monomers in the presence of unsaturated polyester resin

Hybrid miniemulsion polymerization was performed with a three‐component acrylic system of methyl methacrylate, butyl acrylate, and acrylic acid in the presence of a Bayer® Roskydal TPLS2190 unsaturated polyester resin. Latexes were obtained in which the polyester resin was grafted to the acrylic polymer, forming a water‐based crosslinkable coating. Grafting between the resinous component and the acrylic polymer is a feature different from the work of others who have attempted to combine the properties of both systems in water‐based blends. Both emulsions and latexes were shelf‐stable for over 6 months, shear‐stable, and resistant to at least one freeze/thaw cycle. Resin‐to‐monomer ratios were studied as high as 1 : 1 (wt : wt), and total emulsion solids, as high as 45%. Monomer droplet and latex particle sizes were similar, suggesting evidence of the preponderance of droplet nucleation. A high level of crosslinking (>70%) during polymerization was observed in this particular hybrid system in contrast to those involving alkyd or polyurethane resins (<5%). Films, both homogeneous and hard, were achieved with exceptional adhesion. Electron microscopy showed the hybrid particle morphology to have internal domains of polyester resin in an acrylic matrix. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 75: 916–927, 2000     

水性碳纳米管接枝改性环氧树脂的合成

用酸氧化法对多壁碳纳米管(MWNTs)进行羧化处理后引入酰氯基团,利用酰氯基团与环氧酯聚合物中的羟基进行缩聚反应将MWNTs接枝到环氧树脂结构中,合成得到碳纳米管接枝改性的环氧酯聚合物。该聚合物与丙烯酸单体进行自由基聚合,在聚合物中引入羧基,利用羧基与有机胺中和成盐,制得水性碳纳米管接枝改性环氧酯聚合物。对聚合物进行红外光谱和透射电镜分析表明,碳纳米管与环氧酯聚合物进行了接枝反应。     

Synthesis of acrylate modified vinyl chloride and vinyl isobutyl ether copolymers and their properties

With acrylic acid, butyl acrylate and methyl methacrylate as the monomers, acrylate modified vinyl chloride and vinyl isobutyl ether copolymers were prepared by solution polymerization. Firstly, vinyl chloride and vinyl isobutyl ether copolymers were grafted with acrylic monomers to obtain a product containing acrylate grafted vinyl chloride and vinyl isobutyl ether copolymers and polyacrylate, which was then neutralized by triethylamine and dispersed into water to get a self-emulsified emulsion. The acrylate modified vinyl chloride and vinyl isobutyl ether copolymers were characterized by Fourier transform infrared spectroscopy. The mean molecular weight of grafted polymer was determined by gel permeation chromatography, and the particle sizes and their distributions of the dispersions were measured by laser light scattering. The influences of initiator concentration, acrylate content, acrylic acid content and neutralization degree upon the properties of the modified copolymers were discussed. The results show that the emulsion will be with good storage stability, and the modified polymer will be with high water resistance, impact resistance and excellent adhesion when initiator concentration is 1.5%, acrylate content is 50%, acrylic acid content ranges from 9% to 11%, and neutralization degree is between 80% and 100%.     

Preparation of an acrylic‐grafted polyester and its aqueous dispersion—Effect of the molecular structures of the grafted polyesters on viscosity and rheology of dispersion

An investigation was undertaken to develop a new class of water‐borne polyesters that have various viscosity and various rheological profiles. We discussed the effect of the grafting condition on the molecular weights of the acrylic segments in the acrylic‐grafted polyester. The molecular weights of the acrylic segments could be changed by an initiator concentration, a chain transfer agent concentration, and a monomer concentration. We discussed the viscosity and the rheology of the dispersions obtained from the above‐grafted polyesters. The viscosity of the dispersion decreased as the molecular weights of the acrylic segments decreased. It was considered that the interaction between the particles of the dispersions decreased with a decrease in the thickness of the shell layer. The viscosity of the dispersions also decreased as the solubility of the acrylic segments in water decreased. It was considered that the interaction between the particle of dispersion decreased with the shrinkage of the shell layer. The rheological profile of dispersion was changed not by the molecular weights but the composition of the acrylic segments. The dispersions having various rheological profiles could be obtained by the control of the molecular weights or the composition of the acrylic segments in the grafted polyesters. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 76: 350–356, 2000