1) polyurea protective coatings
聚脲防护涂层
1.
The tack-free time and adhesion of three kinds of primers of polyurea protective coatings for the protection bridge concrete,that were epoxy primer(EP),one-component polyurethane primer(PU1),two-component polyurethane primer(PU2),were researched in this paper.
研究了环氧底漆(EP)、单组分聚氨酯底漆(PU1)、双组分聚氨酯底漆(PU2)等三种桥梁混凝土聚脲防护涂层配套底漆的表干时间和附着性,考察了环境温度和湿度以及间隔时间对附着性的影响。
2) polyurea coating
聚脲涂层
1.
The mechanism of cathodic disbonding properties of polyurea coating is discussed and the prescription of the elastic body is selected firstly.
探讨了聚脲涂料在金属上的阴极剥离机理及聚脲弹性体配方的选择,分析了金属表面、聚脲/金属界面附着力、聚脲涂料配方对聚脲涂层的耐阴极剥离性能的影响。
2.
The polyurea coating was tested with Taber tribo-machine and the high-pressure water jet erosion tester for studying the wear behavior of polyure coating under conditions of dry friction and high-speed water jet contained sand.
为研究聚脲涂层在干摩擦条件下和高速含砂水流冲蚀条件下的性能变化情况,用Taber磨损试验机和高速含沙水射冲蚀磨损试验机测试了聚脲涂层的磨损性能,用扫描电子显微镜和白光共焦三维轮廓仪观测涂层的磨损表面形貌,用表面红外光谱和电子显微镜能谱元素分析了涂层表面试验前后的组分变化,分析了涂层在2种摩擦条件下的磨损情况。
3.
It shows that there are cracks on the surface of epoxy coated concrete after 50 freezing-thawing cycles,and there is a large area coating off after 250 freezing-thawing cycles,the relative dynamic elastic modulus was decreased by 60%;while the surface of polyurea coating was still intact after 300 freezing-thawing cycles,and the modulus was only decreased by 8%.
采用快冻法,研究聚脲涂层和环氧涂层对混凝土抗冻性的影响。
4) protective coating
防护涂层
1.
The oxidation behavior of alloy GH 2907 at 650℃ for 1000h and its protective coating have been investigated.
研究了 GH2907合金在650℃、1000h 的氧化行为和防护涂层,结果表明合金在650℃氧化前期,其动力学曲线遵循抛物线规律,然而在500h 后转为直线规律。
5) protective coatings
防护涂层
1.
This article describes two types of high-temperature protective coatings——Great Wall No.
介绍了烟机叶片使用的长城1号(C-1)、长城33号(C-33)两种防护涂层。
补充资料：聚脲
| 聚脲 polyureas 主链含桸HCO桸H椊峁沟ピ囊焕嗑酆衔铩＞垭宓男灾Ê与聚酰胺、聚酯、聚氨酯相近，但熔点较高，一般在 250℃以上，结晶度也较大，这是因为分子间形成较聚酰胺和聚氨酯更多的氢键。以上几种相似聚合物若碳原子数相同时，其熔点次序为：聚脲＞聚酰胺＞聚氨酯＞聚酯。除了少数强极性溶剂如二甲基亚砜、浓硫酸外，其他溶剂很难溶解它。聚脲在熔融温度附近易发生热分解，因此限制了它的加工性能及应用范围。 聚脲可由二胺与二异氰酸酯或尿素聚合而成。 聚亚壬基脲是代表性的聚脲高分子。由壬二胺与尿素缩合制备，其性质与聚酰胺（如耐纶6）相似 ，可以熔融纺丝，熔融温度230～235℃，密度较小（1.066克／厘米3），具有良好的耐热性、染色性和耐腐蚀性，纤维抗拉强度0.0441～0.0539牛顿／旦，伸长率23％，适宜制造渔网和针织品。 |
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参考词条