PU-NC Semi-lPNs應用於木器塗料之研究（I） - NCO/OR莫耳比與PU/NC組成對塗料及塗膜性質之影響

Study on the Application of PU-NC Semi-IPNs for Wooden Coatings (I) - Effect of NCO/OR Molar Ratio and PU/NC Composition on Properties of Coatings and Films

盧崑宗(Kun-Tzung Lu) ； 劉正字(Cheng-Tzu Liu)

《林產工業》 16卷4期 (1997/12) Pp. 731-747

https://doi.org/10.6561/FPI.1997.16(4).11

摘要

本試驗係以篦麻油為基質之聚胺基甲酸醋（PU）與硝化纖維素（NC）合成半互穿聚合體網狀結構物（Semi-IPNs），探討在各種NCO/OH莫耳比及PU/NC組成，作為木器塗料之可行性；經塗料之粘度、乾燥時間、膠化時間，及塗膜機械性質、冷熱循環之塗膜耐久性及塗膜耐光性等分析，發現PU/NC之semi-IPNs可以明顯縮短PU的乾燥時問，並且無可使用時間的限制，尤其以NCO/OH=1.2、PU/NC=70/30之組合，可以明顯提升PU的拉伸強度及硬度，但semi-IPNs之耐光性則較純PU及NC者為差；而塗膜熱重量分析（TGA）、動態機械分析（DMA）、傅立葉紅外線光譜分析（FT-IR）、及掃描式電子顯微鏡分析（SEM）則將於第二報中敘述。

關鍵字

硝化纖維素 ； 聚胺基甲酸酯 ； 半互穿聚合體網狀結構物 ； 木器塗料

並列摘要

The coatings containing semi-interpenetrating polymer networks (semi-IPNs) were prepared from castor oil based polyurethane (PU) and nitrocellulose (NC) under different NCO/OH molar ratios of PU and PU/NC compositions. It revealed that the drying time of PU could be shorted significantly and had no limit of pot-life by interpenetrating with NC. The tensile strength and hard- ness of semi-IPNs with NCO/OH=1.2, PU/NC=70/30 were significiantly improved as compared to those of PU but the lightfastness of semi-IPNs was inferior than those of PU and NC films. The analysis of TGA, DMA , FT-IR and SEM of semi-IPNs films will be discussed in the next report .

並列關鍵字

Nitrocellulose ； Polyurethane ； Semi-interpenetrating polymer networks ； Wooden coatings