The Study ofPU Waterproof Film

• Main Authors: Hsiao, chung-liang, 蕭忠良
• Other Authors: Wu Yeng-Chi
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/81555001771449959912

碩士 === 文化大學 === 應用化學系 === 85 === Polyurethane waterproof was formed a film with pre-polymer afforded by heating PPG and TDI，and then undergone hardining at 24-36 hours.The expected PU water-proof has exceedingly good property of physics, and it colud resist abrasion in chemical reagent and oil manufactures.Furthermore,it cold fit the case for damp surface,non-level place,complex construction and eroded area.Polypropylene glycol ( molecular weight is 1500 ) reacted with toluene diiso-cyanate was shown in Figure 4.Comparing Figure 4 with Figure 1 and Figure 3,it was clearely found that -NCO group (2375~2620 cm-1) and -C=O group (1725cm-1) in Figure 1 and hydroxyl group (3500cm-1) in Gigure 3 also shown in Figure 4.From the result proved the existed structure of polypropylene and toluene di-isocyanate.