| 含氟自交联型醋酸乙烯酯聚合物乳液的制备及表面性能 |
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| 引用本文： | 杨晓武,沈一丁. 含氟自交联型醋酸乙烯酯聚合物乳液的制备及表面性能[J]. 化工学报, 2009, 60(12): 3165-3170 |
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| 作者姓名： | 杨晓武 沈一丁 |
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| 作者单位： | 陕西科技大学轻化工助剂化学与技术教育部重点实验室,陕西,西安,710021;陕西科技大学轻化工助剂化学与技术教育部重点实验室,陕西,西安,710021 |
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| 基金项目： | 国家自然科学基金，陕西科技大学研究生创新研究基金 |
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| 摘 要： | 通过无皂乳液聚合法合成了一种含氟自交联醋酸乙烯酯聚合物，用表面电子能谱仪(ESCA)检测了树脂成膜后的含氟成分的分布情况，测量了涂膜与水、乙二醇的接触角，并应用该聚合物制作了一种氟碳涂料，检测了涂膜的耐冲击性、附着力、柔韧性、硬度、光泽度等常规性能和耐蚀、耐候性能。研究发现，含氟自交联醋酸乙烯酯聚合物成膜时产生了较大取向作用，含氟基团向空气/聚合物界面伸展，对聚合物内部分子形成了很好的保护作用，使涂膜具有较高的防腐性能及优异的耐候、耐蚀性能。相对于纯醋酸乙烯酯聚合物，当氟含量为5.73%时，涂膜光泽度达98.2%，硬度2H，附着力1级，柔韧性1级，耐冲击性50 cm，表面能由0.3751 mN·cm-1降低到0.1652 mN·cm-1;经人工气候老化1600 h，涂膜的光泽保留率大于93%;经化学介质浸蚀360 h后，涂膜外观无变化。
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| 关 键 词： | 含氟 醋酸乙烯酯聚合物 自交联 表面性能 防腐耐候性 |
| 收稿时间： | 2009-03-24 |
| 修稿时间： | 2009-9-11 |
Preparation and surface properties of fluorinated self-crosslinking vinyl acetate polymer emulsion |
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| YANG Xiaowu,SHEN Yiding. Preparation and surface properties of fluorinated self-crosslinking vinyl acetate polymer emulsion[J]. Journal of Chemical Industry and Engineering(China), 2009, 60(12): 3165-3170 |
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| Authors: | YANG Xiaowu SHEN Yiding |
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| Abstract: | A kind of fluorinated self-crosslinking vinyl acetate polymer was synthesized by soap-free emulsion polymerization.The distribution of the fluorinated group on the surface of the polymer membrane was investigated with electron spectroscopy for chemical analysis (ESCA).The contact angles of the membrane with water and ethylene glycol were measured.The results showed that during the process of membrane-forming by casting, the fluorinated group stretched on the interface of air and polymer, which could protect the inner molecule of the polymer effectively,and the membranes were provided with excellent corrosion resistance and weather resistance.As fluorinated group content was 5.73%(mass), membrane adhesive force grade and flexibility could reach the 1st level, gloss 98.2%, hardness 2H, resistance to shock 50 cm and the surface free energy decreased from 0.3751 mN·cm-1 to 0.1652 mN·cm-1.The membrane gloss retention ratio kept above 90% after 1600 h artificial aging. Furthermore, no changes took part in the membranes after being corroded with wet salt and chemical for 360 h. |
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| Keywords: | fluorinated vinyl acetate polymer self-crosslinking surface property corrosion and weather resistance performance |
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