PU-NC Semi-IPNs本器塗科組成分之添加次序對其性質之影響

Effects of Components Adding Sequence on the Properties of PU-NC Semi-IPNs Wood Coatings

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

《林產工業》 20卷1期 (2001/03) Pp. 21-28

https://doi.org/10.6561/FPI.2000.20(1).3

摘要

本研究係以吹製型篦麻油（BCO）、芳香族聚異氰酸鹽（PTDI）、硝化纖維素（NC）等為原料，在NCO/OH莫耳比為1.2，及各種PU/NC重量比為70β0、50/50及30/70之條件下，以連續聚合方式合成PU-NC半互穿聚合體網狀結構物（Semi-IPNs），作為木器塗料使用，探討組成分之添加次序對塗料及塗膜性質之影響。試驗結果發現，在相同PU/NC重量比之條件中，無論PU與NC的互穿效果，塗膜拉伸強度、硬度、耐光性、耐熱性及耐溶劑性等，均以NC與BCO先混合再添加PTDI者（即NC→BCO→PTDI），較先以BCO與PTDI反應後再添加NC者（即BCO→PTDI→NC）為佳，但2種不同添加次序Semi-IPNs之乾燥時間及膠化時間等塗料性質則無明顯區別。

關鍵字

半互穿聚合體網狀結構物 ； 聚胺基甲酸酯 ； 硝化纖維素 ； 組成分添加次序 ； 木器塗料

並列摘要

The PU-NC semi-interpenetrating polymer networks (semi-IPNs) made from blown castor oil (BCO) based polyurethane (PU) and nitrocellulose (NC) under NCO/OH=1.2 (molar ratio) and PUINC=70/30, 50/50, 30/70 (by weight) respectively, were prepared by sequential polymerization method for wood coatings. To investigate the effects of adding sequence of components on the properties of PU-NC semi-IPNs wood coatings, two kinds of adding sequence were examined in this study. The results indicated that under the same formulations of PU-NC semi-IPNs, the degree of interpenetrating between PU and NC, tensile strength, hardness, lightfastness, heat resistance and solvent resistance of films of NC→BCO→PTDI sequence were better than those of BCO→PTDI→NC sequence, while the viscosity, drying time, and geltime of coatings, were not different significantly.

並列關鍵字

Semi-interpenetrating polymer networks ； Polyurethane ； Nitrocellulose ； Adding sequence of components ； Wood coatings