不饱和聚酯树脂增稠特性的研究

STUDY ON THICKENING CHARACTERISTICS OF UNSATURATED POLYESTER RESIN

采用旋转流变仪研究了增稠剂的种类和用量、增稠温度以及填料种类等对不饱和聚酯树脂(UP)增稠体系粘度的影响,分别通过酸值滴定和红外分析等手段探讨了MgO和MDI的增稠机理,结果表明,四种增稠剂的增稠速度不同,其中MgO最快;增加增稠剂的用量均可加快增稠速度,增稠速度也随增稠温度的增加而加快;填料的加入使得体系的粘度迅速增大,并且不同种类的填料对体系粘度的影响不同,与CaCO_3相比,ATH使体系的粘度增加更多。因此工业生产中要综合考虑各方面因素,以获得合适的增稠工艺。

In this paper, the effects of the type and content of thickening agents, thickening temperature and the type of filler on the viscosity of unsaturated polyester resin were studied by Physica MCR 301 rheometer. Otherwise, the thickening mechanisms of MgO and MDI were studied by acid value titration and infrared analysis respectively. The research results showed that, four kinds of thickening agents had different thickening rates, in which MgO was the fastest. As the content of thickening agents increased, the thickening rate increased. The thickening rate also increased with the increasing of the thickening temperature. The addition of fillers made viscosity increase, and different fillers had different effects, compared to CaCO3, the effect of ATH was bigger at the same content. Therefore, many factors should be considered to acquire appropriate thickening process in industrial production.