用于外墙外保温的胶粘剂有效成分含量检测
2021-04-27杨成梅
杨成梅



摘 要:针对国内对外墙外保温的胶粘剂有效成分含量检测困难的问题,提出一种溶出分离的方法。为验证该方法的可行性,以某工程外墙中的抹面砂浆硬化体作為样品,在样品预处理的基础上,采用溶出分离的方法,选择甲苯、乙酸乙酯、丙酮作为溶解试剂,从而提取抹面砂浆硬化体中的共聚物粘胶剂。然后用傅里叶变换红外吸收光谱仪、综合热分析仪分析了样品中聚合物含量。结果表明,在得到的7g样品中,测定得到聚合物组分含量为3.2%;通过红外光谱与示差扫描量热证实,该样品中含有的有效聚合物成分为乙烯-醋酸乙烯共聚物。
关键词:外墙外保温系统;胶粘剂;聚合物成分;成分
中图分类号:TU58;TQ430.7+1 文献标识码:A 文章编号:1001-5922(2021)07-0038-04
Detection of Effective Component Content of Adhesive Used in the External Thermal Insulation
Yang Chengmei
(School of Applied Engineering , Urumqi Vocational University, Urumqi 830002, China)
Abstract:In order to solve the problem that it was difficult to detect the effective component content of adhesives for external wall insulation in China, a dissolution separation method is proposed. In order to verify the feasibility of this method, the hardened body of the plastering mortar in the exterior wall of a certain project was used as a sample. Based on the sample pretreatment, the method of dissolution and separation was adopted, and toluene, ethyl acetate, and acetone were selected as dissolving reagents to extract copolymer adhesive in hardened body of plastering mortar. Then the polymer content in the sample was analyzed by means of Fourier transform infrared absorption spectrometer, comprehensive thermal analyzer. The results show that in the obtained 7g sample, the polymer component content was determined to be 3.2%; it was confirmed by infrared spectroscopy and differential scanning calorimetry that the effective polymer component contained in the sample was ethylene-vinyl acetate copolymer.
Key words:exterior wall insulation system; adhesive; polymer composition; component
外墙外保温因为隔热、保温等性能,在我国建筑中被广泛运用。粘胶剂作为外墙外保温系统的重要组成部分,其有效成分直接决定了墙外保温体系的性能。因此,做好外墙外保温墙中粘胶剂成分的测定,对做好外墙外保温墙体的质量具有非常重要的作用和价值。但国内针对外墙外保温粘胶剂有效成分的检测方式还不统一,缺乏有效的检测手段,从而无法直接对外墙外保温系统中的聚合物砂浆质量进行控制。为寻找一种有效的用于外墙外保温胶粘剂成分含量检测的方式,国内部分专家进行了研究,如李建伟(2019)等人对外墙保温用胶粘剂测试方法进行探讨,但并没有从根本解决外墙外保温的胶粘剂有效成分测定问题;刘彤(2016)则提出采用微观观察的方式进行测定,但却没有进行定量计算。……
