以甲基丙烯酸乙酰乙酸乙酯(AAEM)为酮单体,己二酰肼(ADH)、碳酸二酰肼、草酸二酰肼和丁二酸二酰肼为肼单体,采用原位聚合法制备了系列阴离子酮肼交联改性聚氨酯-聚丙烯酸酯(PUA)分散液.通过透射电镜和动态光散射研究了乳胶粒的尺寸和微观形貌;系统分析了不同肼单体对乳胶膜的力学性能、断面微观形貌、耐水性和热性能的影响.研究结果表明,肼单体的引入可综合提高乳胶膜的吸水性、交联密度、力学性能和热性能,乳胶膜断裂由脆性断裂转变为韧性断裂.采用不同肼单体所制PUA分散液的粒径及其分布随着肼单体亲水性的增加而降低.4种肼单体中碳酸二酰肼的反应活性最高,己二酰肼的反应活性最低.采用碳酸二酰肼所制PUA乳胶膜的力学性能、耐水性和热性能最佳,其热分解活化能最高.而采用己二酰肼所制PUA乳胶膜的综合性能较差.
参考文献
[1] | Mariz, IDA;Millichamp, IS;de la Cal, JC;Leiza, JR .High performance water-borne paints with high volume solids based on bimodal latexes[J].Progress in Organic Coatings: An International Review Journal,2010(3):225-233. |
[2] | García-Pacios, V.;Costa, V.;Colera, M.;Martín-Martínez, J.M. .Waterborne polyurethane dispersions obtained with polycarbonate of hexanediol intended for use as coatings[J].Progress in Organic Coatings: An International Review Journal,2011(2):136-146. |
[3] | Subramani S;Cheong IW;Kim JH .Synthesis and characterizations of silylated polyurethane from methyl ethyl ketoxime-blocked polyurethane dispersion[J].European Polymer Journal,2004(12):2745-2755. |
[4] | Dong Hyup Park;Je Kon Oh;Sang Bum Kim .Synthesis and Characterization of Sulfonated Polyol-Based Waterborne Polyurethane-Polyacrylate Hybrid Emulsions[J].Macromolecular Research,2013(11):1247-1253. |
[5] | Athawale, Vilas D.;Nimbalkar, Ramakant V. . .Waterborne Coatings Based on Renewable Oil Resources: an Overview[J].Journal of the American Oil Chemists' Society,2011(2):159-185. |
[6] | Nakayama Y .Development of novel aqueous coatings which meet the requirements of ecology-conscious society: novel cross-linking system based on the carbonyl-hydrazide reaction and its applications[J].Progress in Organic Coatings: An International Review Journal,2004(4):280-299. |
[7] | 杨茹果,李小宁,吕志平,杨云飞.多交联型聚氨酯材料的制备与性能[J].高分子材料科学与工程,2012(04):129-132. |
[8] | 孙世安,费逸伟,王协旗,孙元宝.涂料抗老化技术研究[J].表面技术,2005(05):56-58. |
[9] | 熊竹,熊远钦,尹辉军,张拉拉,徐伟箭.聚氨酯-聚丙烯酸酯复合胶乳的制备及其性能研究[J].高校化学工程学报,2012(02):301-307. |
[10] | 袁开军,江治,李疏芬,周允基.聚氨酯弹性体的热分解动力学研究[J].应用化学,2005(08):861-864. |
[11] | 邓威,傅和青,黄洪.内交联水性聚氨酯涂膜性能的影响因素[J].高分子材料科学与工程,2012(09):91-94,99. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%