PU-NC Semi-IPNs應用於木器塗料之研究（II）-NCO/OH莫耳比與PU/NC組成對semi-IPNs塗膜性質之影響

Study on the Application of PU-NC Semi-IPNs for Wooden Coatings (II) - Effect of NCO/OH Molar Ratio and PU/NC Composition on Properties of Semi-IPNs films

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

《林產工業》 16卷4期 (1997/12) Pp. 749-766

https://doi.org/10.6561/FPI.1997.16(4).12

摘要

本試驗係以篦麻油為基質之聚胺基甲酸醋（PU）與硝化纖維業（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；經塗膜熱重量分析（TGA）、熱機械分析（TMA）、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），發現PU/NC之semi-IPNs可以增加PU的耐熱性，又當PU含量至70%時，可將NC開始劣解的溫度由200°C提升至220°C左右；綜合本研究之塗料與塗膜性質分析結果，可以確認由PU與NC能簡易而成功地製備semi-IPNs，而且本研究中以NCO/OH=1.2之PU及PU/NC=70/30之組合，PU與NC互穿纏繞效果最佳，且各項塗料與塗膜性質最為平衡且優良，適用為木器塗料並可配合工廠的塗裝作業。

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. The results from TGA, TMA, DMA, FT-IR and SEM revealed improved thermal properties for semi-IPNs as compared to those of PU and the decomposition temperature of NC would be shifted from 200 °C to 220 °C. In this study, the formulation of NCO/OR = 1.2 and PU/NC = 70/30 had a best compatible system and ideal interpenetrating and got excellent and most balance on properties of coatings and films. In conclusion, the PU-NC semi-IPNs can be readily prepared and used for wooden coatings.

並列關鍵字

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