采取新工艺以甲苯二异氰酸酯(TDI-80)、聚醚二元醇(N220)、三羟甲基丙烷(TMP)、二羟甲基丙酸(DMPA)、环氧树脂(E-20)、甲基丙烯酸甲酯(MMA)等原料合成了聚氨酯一丙烯酸酯复合分散体(PUA-1),通过双丙酮丙烯酰胺(DAAM)引入酮羰基和己二酸二酰肼(ADH)引入肼基,合成了室温自交联复合分散体(PUA-2).探讨了DMPA,MMA,DAAM和ADH的加入量对分散体和涂膜性能的影响.通过傅立叶红外光谱(FTIR)、示差扫描量热仪(DSC)、接触角测量仪对PUA-1及PUA-2进行了表征.结果表明,当DMPA,MMA,DAAM的含量[占聚氨酯(PU)的质量分数]分别为6%,25%,2.5%及ADH与DAAM的摩尔比为1时,分散体和涂膜的综合性能较好;酮肼间发生了交联反应,交联使得胶膜的耐水性和力学性能得到了提高.
Waterborne polyurethane-acrylic hybrid dispersion PUA-1 was synthesized by using toluene diisoeyanate (TDI) , polyether binary alcohol (N220), dimethylolpropionic acid (DMPA) , epoxy resin (E-20) and methyl methaerylate (MMA) as the starting materials. Then composite dispersion PUA-2 which was self-crosslinkable at ambient temperature was obtained by adding diacetone acrylamide (DAAM) and adipic dihydrazide (ADH). The effects of the dosage of DMPA, MMA,DAAM and ADH on the properties of the emulsions of PUA-1 and PUA-2 and their films were investigated. At the same time, the chemical structure, thermal stability and water conact angle of the films of PUA-1 and PUA-2 were measured by using a Fourier transformation infrared spectrometer, a differential scanning calorimeter and a water contact angle meter. Results show that the PUA hydride dispersion prepared at ADH/DAAM molar ratio of 1 and DMPA, MMA, DAAM dosage of 6.0 %, 25.0 %, 2.5 % respectively has better comprehensive properties. Crosslinking reaction had taken place between DAAM and ADH, which contributed to improved resistance to water and mechanical properties of the film of self-crosslinkable PUA-2.
参考文献
| [1] | 虞兆年.涂料工艺[M].北京:化学工业出版社,1996 |
| [2] | 英燕;魏欣.水性聚氨酯[J].安徽化工,1997(04):1-4. |
| [3] | Melchiors M.;Kobusch C.;Jurgens E.;Sonntag M. .Recent developments in aqueous two-component polyurethane (2K-PUR) coatings[J].Progress in Organic Coatings: An International Review Journal,2000(1/4):99-109. |
| [4] | Monica Bertoldo;Simona Bronco;Piero Narducci;Stefano Rossetti;Marco Scoponi .Polymerization Kinetics and Characterization of Dual Cured Polyurethane-Acrylate Nanocomposites for Laminates[J].Macromolecular materials and engineering,2005(5):475-484. |
| [5] | Durrieu V;Gandini A .Preparation of aqueous anionic poly-(urethane-urea) dispersions.Influence of incorporation of acrylic polycarbonate and pedluoro-oligoether diols on the dispersion and polymer properties[J].Polymers For Advanced Technologies,2005,16(11):840-845. |
| [6] | Chambon P;Cloutet E;Cramail H .Synthesis of core-shell polyurethane-polydimethylsiloxane particles by polyaddition in organic dispersant media: Mechanism of particle formation[J].Macromolecular symposia,2005(0):227-238. |
| [7] | 胡国文,沈慧芳,杨清峰,陈焕钦.聚氨酯-丙烯酸酯复合乳液的合成与表征[J].华南理工大学学报（自然科学版）,2007(06):64-70. |
| [8] | 王金平,贾梦秋.丙烯酸树脂交联改性水性聚氨酯乳液[J].北京化工大学学报(自然科学版),2004(05):60-63. |
| [9] | 傅献彩;沈文霞;姚天扬.物理化学[M].北京:高等教育出版社,1991:987-1082. |
| [10] | Lovell P A;El-Aasser Ed.Emulsion polymerization and emulsion polymers[M].John Wiley and Sons,Inc,1997:59-121. |
| [11] | Son SH.;Kim JH.;Lee HJ. .Effects of carboxyl groups dissociation and dielectric constant on particle size of polyurethane dispersions[J].Colloids and Surfaces, A. Physicochemical and Engineering Aspects,1998(3):295-301. |
| [12] | 曹玉同;刘庆普;胡金生.聚合物乳液合成原理性能及应用[M].北京:化学工业出版社,1997:17-26. |
| [13] | 黄洪,傅和青,邓艳文,陈焕钦.环氧树脂与丙烯酸酯复合改性水性聚氨酯的合成研究[J].高校化学工程学报,2006(04):583-587. |
| [14] | 朱诚身.聚合物结构分析[M].北京:科学出版社,2004:192. |
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