Effect of nano‐TiO2 on MP‐25 resin |
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| Authors: | Bin Xiang Zhang Shengtao Huang Wenzhang Hou Baorong |
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| Affiliation: | 1. College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China;2. Chongqing University of Science and Technology, Chongqing 400012, China;3. Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 260071, China |
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| Abstract: | MP‐25 resin is a chlorine‐containing polymer widely used in coatings. The effects of two types of nano‐TiO2 (P‐25 and RM301 LP) on MP‐25 were studied with saline immersion, UV irradiation, and electrochemical impedance spectroscopy. UV irradiation was evaluated in terms of gloss change and X‐ray photoelectron spectroscopy (XPS). The results indicate that, compared to pigment R‐930 TiO2, P‐25 reduced the immersion resistance and accelerated UV aging of the MP‐25 coating, whereas RM301 LP showed the opposite effects. XPS analysis showed that MP‐25 resin degraded under UV irradiation via dechlorination and C? C bond breakage, similarly to poly(vinyl chloride), but RM301 LP could inhibit the aging of MP‐25 to a certain extent. A skin effect of oxygen and chlorine was identified in MP‐25 resin by XPS. RM301 LP could improve the impedance of the MP‐25 coating because of its excellent fill capacity. Hence, rutile nano‐TiO2 RM301 LP represents an excellent additive for MP‐25 resin. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008 |
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| Keywords: | degradation dyes/pigments electrochemistry nanotechnology |
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