聚含氟丙烯酸酯-聚氨酯三嵌段共聚物水基分散体的合成及膜结构

聚含氟丙烯酸酯-聚氨酯三嵌段共聚物水基分散体的合成及膜结构;含氟丙烯酸酯;水性聚氨酯分散体;表面结构;核壳分散体     

双重自交联聚氨酯-丙烯酸酯复合乳液的合成

自交联;水性;聚氨酯;丙烯酸酯;复合乳液     

紫外光固化水性树脂的研究与应用

介绍了紫外光固化水性树脂的分类,着重从引入的亲水基团种类的不同介绍了阴离子型、阳离子型以及非离子型三种水性UV固化自乳化型聚氨酯丙烯酸酯树脂的分类与制备,以及国内外的最新研究进展;并对水性UV固化聚氨酯丙烯酸酯树脂的其它相关研究进行了概述,简要介绍了水性UV固化树脂的相关应用.     

金属离子络合交联丙烯酸酯共聚物无皂水溶胶涂料 Ⅰ.丙烯酸酯共聚物的合成和表征

金属离子络合交联丙烯酸酯共聚物无皂水溶胶涂料Ⅰ．丙烯酸酯共聚物的合成和表征杨立群谢志明李卓美＊（中山大学高分子研究所广州５１０２７５）关键词交联丙烯酸酯共聚物，无皂水溶胶，水性涂料，合成１９９７－０６－１６收稿，１９９８－０１－０８修回广州市科委科技...     

金属离子络合交联丙烯酸酯共聚物无皂水溶胶涂料 Ⅱ.Zn(NH_3)_4~(2 )交联无皂水性涂料的性能

金属离子络合交联丙烯酸酯共聚物无皂水溶胶涂料Ⅱ．Ｚｎ（ＮＨ３）２＋４交联无皂水性涂料的性能杨立群谢志明李卓美＊（中山大学高分子研究所广州５１０２７５）关键词交联丙烯酸酯共聚物，无皂水性涂料，流变性，耐热性，硬度１９９７－０６－１６收稿，１９９７－１２...     

聚氨酯-丙烯酸酯杂化乳液结构与性能的影响

以聚四氢呋喃醚二醇（PTMG）、异氟尔酮二异氰酸酯（IPDI）、亲水单体二羟甲基丙酸（DMPA）,乙二胺为主要原料,制备了稳定的水性聚氨酯乳液.然后以苯乙烯（St）、丙烯酸丁酯（BA）为单体,过硫酸钾为引发剂,在不外加乳化剂的条件下,运用物理共混、化学复合和化学共聚三种方法对该水性聚氨酯乳液进行改性研究.用FTIR技术对聚氨酯-丙烯酸酯杂化乳液的结构进行了对比与表征;通过粘度测定、粒度分析、力学性能和耐水性能测试、DSC分析,研究了不同改性方法对乳液及其胶膜性能的影响.结果表明,化学共聚的改性方法对原水性聚氨酯的耐水性的改良效果最好,能够得到稳定且综合性能较优的聚氨酯-丙烯酸酯杂化乳液.     

水性丙烯酸酯聚氨酯涂料的研究

合成了含羟基的丙烯酸酯树脂,并与甲苯二异氰酸酯反应制备预聚体Ⅰ,Ⅰ与扩链剂二羟甲基丙酸反应得到含羧基的预聚体Ⅱ,最后用1,4-丁二醇交联,制得水性丙烯酸酯聚氨酯涂料,讨论了合成过程中影响乳液稳定性和涂膜性能的因素。测试结果表明：涂膜的强度、光泽、硬度等性能均优于传统的同类树脂。     

含羧基嵌段的离聚体的合成及其性能研究

合成了羧基有序分布和羧基无序分布的两类光固化水性聚氨酯丙烯酸酯 (PUA)的离聚物 ,研究了其光固化反应动力学 ,并测定其预聚物分散液的性能和固化膜的性能。     

乙酰丙酮钛螯合物掺杂丙烯酸酯共聚物水溶胶

乙酰丙酮钛螯合物掺杂丙烯酸酯共聚物水溶胶;乙酰丙酮钛螯合物; 丙烯酸酯共聚物水溶胶;掺杂     

丙烯酸酯改性水性聚氨酯乳液的制备及性能研究

采用共聚的方法制备出丙烯酸酯改性的水性聚氨酯共聚乳液(PUA乳液),并对PUA乳液的制备方法和工艺、耐溶剂性、机械稳定性进行了初步的研究。结果表明,具有IPN结构的PUA乳液耐溶剂性、机械稳定性比水性PU有明显的提高。     

Comparative study between core-shell and interpenetrating network structure polyurethane/polyacrylate composite emulsions

Anionic aqueous polyurethane dispersion was prepared by using carboxyl acid group to make the polyurethane dispersible, and then nanograde core-shell and crosslinked IPN structure polyurethane/polyacrylate composite latex (PUA) were synthesized by soap-free emulsion polymerization method with polyurethane dispersion as seed. FTIR, DSC, dynamic light scattering, TEM, ESCA, TGA, electronic tensile machine were employed to investigate the structures and properties of the composite latex and their polymers. Meanwhile the core-shell composite PUA emulsion and the crosslinked IPN composite PUA emulsion were compared. The results showed that the particle morphology of PUA composite emulsion is inverted core-shell structure with polyacrylate as the core and with polyurethane as the shell. The morphology of the crosslinked PUA emulsion was multi-core structure. The surface in core-shell PUA contains rich PU phase. The phase structure of the crosslinked PUA is more uniform. Three transition temperatures are observed for the core-shell composite PUA, two transitions are observed for the film from the crosslinked PUA. The TGA curves of core-shell PUA and crosslinked PUA exhibit two stages, the first stage corresponds to the thermal decomposition of hard segments in seed polyurethane; the second stage corresponds to the decomposition of soft segments in PUA and decomposition of polyacrylate. With the increase of glycidyl methacrylate (GMA) amounts in PUA composite emulsions, the tensile strength of the PUA films as well as the average diameter of the PUA composite emulsion particles increase, the elongation at break of the PUA films decreases.     

Self-compatibilization of polymer blends prepared via functionalized concentrated emulsion polymerization

Two “functionalized” concentrated emulsions in water were prepared separately, one from a weakly polymerized mixture of styrene (S) and a small amount of acrylic acid (AA) and the other from a mixture of butyl acrylate (or butyl methacrylate) and a small amount of glycidyl methacrylate (GMA). After the two concentrated emulsions were polymerized partially, they were mixed and subjected to complete polymerization. During the latter polymerization, reactions between the carboxyl groups of the AA moieties of the S/AA copolymer and the glycidyl groups of the GMA-containing copolymer occurred, and copolymers and crosslinked structures were generated that constituted the compatibilizers of the system. The blend materials thus obtained possessed excellent toughness compared to those without functional groups. © 1999 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 37: 4233–4240, 1999     

Synthesis of graft copolymers having phospholipid polar group by macromonomer method and their properties in water

Water-soluble graft copolymers with phospholipid polar group were synthesized by the macromonomer method and their properties in water were investigated by surface tension and fluorescence spectroscopic measurements. At first, 2-methacryloyloxyethyl phosphorylcholine (MPC) was polymerized in the presence of 3-mercapt propionic acid as a chain transfer agent and carboxyl group-terminated oligo (MPC) was obtained. The oligo (MPC) reacted with glycidyl methacrylate to convert the carboxyl group to a polymerizable methacryloyl group. The MPC macromonomer obtained was copolymerized with hydrophobic n-butyl methacrylate (BMA) and a graft copolymer was obtained. The graft copolymer, poly(MPC-graft-BMA), was water-soluble when the MPC unit mole fraction was above 0.40. The surface tension of the aqueous solution of poly(MPC-graft-BMA) did not depend on the polymer concentration below 0.1 wt %. This tendency was the same as that which appeared in aqueous poly(MPC) solution. The fluorescence intensity of hydrophobic probes observed in an aqueous solution of the poly (MPC-graft-BMA) was also the same level as that observed in the case of poly(MPC). These results clearly indicated that the poly(MPC-graft-BMA) took a domain structure like micelle in water, i.e., the hydrophobic poly(BMA) backbone was in the core part and the hydrophilic poly(MPC) chain formed the shell part of the micelle. © 1994 John Wiley & Sons, Inc.     

Surface composition and property of film prepared with aqueous dispersion of polyurethaneurea-acrylate including fluorinated block copolymer

The aqueous dispersion of polyurethaneurea-acrylate (PUA) including small amount of fluorinated block copolymers containing carboxyl groups (PATF), which can be dissolved in water, was used to make films and the surface properties of these films were examined. The experimental data show that the modified PUA film exhibits a hydrophobic surface property, although the original surface of PUA film is hydrophilic. The surface composition of the modified PUA film was measured by ATR and XPS. The results indicate that there is a concentration gradient of the fluorine groups along the lines of thickness of the modified film and towards the outmost surface layer, resulting from the migration of fluorinated blocks to the air side surface of the modified PUA film during the film formation process. However, the PUA film can not be modified effectively by adding the sodium salt of PATF, since the urethane groups in the system are easy to occupy on the surface of the film.     

MODIFIED ULTRAVIOLET-CURABLE WATER DISPERSIBLE POLYURETHANE-ACRYLATES*

Three kinds of UV-curable self-emulsified polyurethane-acrylate (PUA) prepolymer, i.e., conventional, chainextended and grafted PUAs, were prepared. The relatively small particle size of the PUA dispersions indicates that the PUAprepolymers exhibit sufficient aqueous dispersibility. The PUA prepolymers can substantially lower the interfacial tension ofwater. Chain-extended PUA dispersions exhibit pseudoplastic behavior and thixotropy to a greater extent than do theirconventional counterpart. The chain-extended and grafted PUA photocure to higher conversion than do the conventional PUequivalent. The results of DSC measurement suggest that there exists phase mixing between the hard and the soft segmentphases for the PUAs based on PEG 400 that is the comparatively short soft segment in the prepolymer. For the PUAprepolymers based on PEG having higher M_n values, chain-extending and grafting could impede the phase separationbetween the hard and the soft segment domains. The adhesion, impact strength and flexibility of the photocured films were tested.     

聚氨酯脲-丙烯酸酯水分散液的粒径及形态研究

研究了羧基含量、异氰酸酯指数（［ － ＮＣＯ］／［ － ＯＨ］） 、聚氨酯脲与聚丙烯酸酯组成比（ＰＵＵ／ＰＡ） 以及一系列制备工艺因素对聚氨酯脲—丙烯酸酯（ＰＵＡ） 水分散液粒子尺寸及形态的影响。结果表明：羧基含量和ＰＵＵ／ＰＡ 组成比增大或异氰酸酯指数减小都会导致分散液粒径减小;ＰＵＡ 中ＰＡ 含量越大,ＰＵＡ 水分散液粒子形态越不规整;工艺因素如搅拌强度、升温速率等对ＰＵＡ 水分散液粒子尺寸及形态的影响不符合传统乳液聚合的规律。     

含环氧基的丙烯酸酯共聚物改性环氧树脂

合成了一系列含环氧基团的丙烯酸酯聚合物（ＨＧＭＢ），并对其改性环氧树脂／４，４‘－二氨基二苯基甲烷的抗冲性能，动态力学行为进行了考察，结果表明：当必性体系中加入质量分数为１５％的ＨＧＭＢ（甲基丙烯酸缩水甘油酯、甲基丙烯酸羟乙基酯、甲基丙烯酸甲酯、丙烯酸丁酯的摩尔分数分别为４．３％、５％、２５．７％、６５％）时，与空白体系相比，改性体系的冲击强度提高５０％，且玻璃化有所提高，模量没有降低。     

Preparation of microcapsulated ammonium polyphosphate,pentaerythritol with glycidyl methacrylate,butyl methacrylate and their synergistic flame‐ retardancy for ethylene vinyl acetate copolymer

A new series of microcapsules containing pentaerythritol (PER) and ammonium polyphosphate (APP) with glycidyl methacrylate and butyl methacrylate as shell materials were synthesized by in situ polymerization. The structure and performance of the microencapsulated APP and microencapsulated PER were characterized by Fourier transform infrared spectroscopy, X‐ray photoelectron spectroscopy, scanning electron microscopy, and water contact angle. The flame retarded ethylene‐vinyl acetate copolymer (EVA) composites were studied by limiting oxygen index, UL‐94 test, and cone calorimeter. It was found that the microencapsulation of flame retardants (FRs) with the glycidyl methacrylate and butyl methacrylate lead to a decrease in the particle's water solubility and an improvement of the hydrophobicity. Results also demonstrated that the FR properties of EVA/microencapsulated APP/microencapsulated PER composites were better than those of the EVA/APP/PER composites at the same loading of FRs. The thermogravimetric analysis results reflected that the microencapsulated EVA composites had better thermal stability because of the forming of stable char during the combustion. Copyright © 2013 John Wiley & Sons, Ltd.     

Structure–property study of waterborne,polyurethane acrylate dispersions based on hyperbranched aliphatic polyester for UV-curable coatings

A series of waterborne, hyperbranched polyurethane acrylates for aqueous dispersions (WHPUDs) based on hydroxy-functionalized hyperbranched aliphatic polyester Boltorn H20 were synthesized and characterized by Fourier transform infrared spectroscopy (FTIR). The aqueous dispersions were electrostatically stabilized with carboxyl groups incorporated into their structures, which were neutralized by triethylamine (TEA). The effects of chemical structures of end groups on various properties of WHPUDs, such as particle size, interfacial tension, and rheological behavior were investigated. The average particle sizes of aqueous dispersions, 43–237 nm, were determined by laser light scattering. Owing to the enlargement of the stabilization site, the particle size decreased as the content of carboxyl group, degree of neutralization, and dielectric constant of the dispersion medium increased. Moreover, the surface tension of aqueous dispersions of WHPUDs decreased as the TEA/COOH mole ratio and degree of neutralization increased. The investigations of the rheological behavior of the WHPUDs suggested that all the dispersions belong to pseudoplastic fluids, and each of them has viscosity much lower compared with the commercial water-based resin EB 2002.     

扩链剂对水性聚氨酯脲与聚甲基丙烯酸甲酯复合体系结构和性能的影响

分别用乙二胺 (EDA)和水作为扩链剂制备了聚氨酯脲 聚甲基丙烯酸甲酯 (PUA)水分散液 .借助DSC、DMA、FTIR研究了扩链剂对PUA的结构和性能的影响 .结果表明在EDA扩链体系中 ,虽然聚甲基丙烯酸甲酯 (PMMA)和聚酯软段以及扩链剂与异氰酸酯生成的硬段均有一定程度的相容性 ,但由此合成的PUA仍具有多相结构 ;水扩链体系只有一个较宽的二级转变区 ,各相之间有较大程度的混合 .由EDA扩链合成的PUA在耐溶剂、耐水性及拉伸强度等方面优于水扩链体系 .两种扩链剂体系所得PUA的性能差异 ,主要与二者和异氰酸酯反应生成的脲键密度不同 ,导致不同的微相结构有关