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| 摘要: |
| 围绕乳液的玻璃化转变温度Tg及自交联、紫外交联、核壳技术的特性,研究了它们对建筑外墙涂料耐沾污性的影响,探查了同一单体类型树脂涂膜的耐沾污性、表面自由能随外墙涂料乳液特性的变化情况.结果表明,苯丙、纯丙类涂膜表面自由能色散分量随乳液Tg的升高而增大,与其耐沾污性随Tg升高而变化相呼应;硅丙涂膜表面自由能色散分量比Tg值与其相近的苯丙或纯苯涂膜高,与其耐沾污性能相呼应. |
| 关键词: 玻璃化转变温度,自交联,紫外交联,核壳技术,耐沾污性,表面自由能 |
| DOI： |
| 分类号:TU561.2 |
| 基金项目:上海市青年科技启明星计划基础研究项目 |
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| Effect of Exterior Coating Emulsion on Dirt-Pick-Up Performance of Paint Film |
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WANG Xue-song ZHANG Ling-hua PAN Shi-hong
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| Abstract: |
| The effects of glass transition temperature(T_g)of emulsion,chemical cross-link,UV cross-link,core-shell technique on the dirt-pick-up resistance of paint film was investigated.Surface energy(polar/disperse portion) was used as an analysis aid to study the change of dirt-pick-up performance of paint film with the speciality of coating emulsion.The results show that for certain type emulsion(styrene-acrylic or acrylic),as T_g increases the disperse portion of surface energy of coating film increases,which shows good agreement to the improving of dirt-pick-up resistant with increasing T_g.For different type of emulsion with similar T_g,the disperse portion of surface energy of silicon-acrylic coated film is higher than styrene-acrylic or acrylic coated one,which agrees well with the better dirt-pick-up resistant performance of silicon-acrylic emulsion compared with styrene-acrylic or acrylic emulsion with similar T_g. |
| Key words: glass transition temperature(T_g),chemical cross-link,UV cross-link,core-shell technique,dirt-pick-up resistance,surface energy |
