CAJ | 학술논문

目的：研究氟改性和硅改性丙烯酸聚氨酯涂层在不同环境中的失效行为。方法通过溶液聚合法制备具有一定羟基含量的丙烯酸酯树脂,再将丙烯酸树脂与多异腈酸酯固化剂配合,获得丙烯酸聚氨酯涂层。通过在丙烯酸酯合成中引入含氟丙烯酸酯单体,制得氟改性丙烯酸聚氨酯涂层；通过在固化过程中引入氨基硅油,制得硅改性丙烯酸聚氨酯涂层。利用傅里叶变换红外光谱( FT-IR)分析涂层的化学组成。对涂层试样进行温度环境实验(室温和100,150益)、湿热环境实验和氙灯老化实验,分析涂层疏水性、光泽度等表面特性的变化。结果氟、硅改性有效提高了涂层的疏水性。未改性、氟改性和硅改性三种涂层在100益以下的环境中服役时,疏水性和光泽度比较稳定。硅改性涂层在150益的高温环境中较未改性和氟改性涂层失效慢。湿热环境对三种涂层的接触角和光泽度等性能影响不大。氟改性涂层在氙灯老化环境中的失效程度较另外两种涂层轻。结论氟改性涂层耐光老化性能较好,硅改性涂层耐温性较好。
목적：연구불개성화규개성병희산취안지도층재불동배경중적실효행위。방법통과용액취합법제비구유일정간기함량적병희산지수지,재장병희산수지여다이정산지고화제배합,획득병희산취안지도층。통과재병희산지합성중인입함불병희산지단체,제득불개성병희산취안지도층；통과재고화과정중인입안기규유,제득규개성병희산취안지도층。이용부리협변환홍외광보( FT-IR)분석도층적화학조성。대도층시양진행온도배경실험(실온화100,150익)、습열배경실험화선등노화실험,분석도층소수성、광택도등표면특성적변화。결과불、규개성유효제고료도층적소수성。미개성、불개성화규개성삼충도층재100익이하적배경중복역시,소수성화광택도비교은정。규개성도층재150익적고온배경중교미개성화불개성도층실효만。습열배경대삼충도층적접촉각화광택도등성능영향불대。불개성도층재선등노화배경중적실효정도교령외량충도층경。결론불개성도층내광노화성능교호,규개성도층내온성교호。
ABSTRACT:Objective To investigate the failure behaviors of different coatings in different environments. Methods Acrylic res-ins with certain amount of hydroxyl were prepared via a solution polymerization route. Acrylic polyurethane coating was obtained by mixing the acrylic resins with polyisocyanate. Fluorinated acrylic polyurethane coating was prepared by introducing fluorinated acry-late into the synthesis of the acrylic resins, while silicone acrylic polyurethane coating was synthesized by introducing amino silicone oil into the curing process of the coatings. The chemical structure of the coatings was confirmed by FT-IR. Failure behaviors of the coatings in different temperature environments ( room temperature, 100 ℃, 150 ℃) , hydrothermal environment and xenon arc lamp artificial aging experiment were monitored by characterizing the contact angle and glossiness of the coatings. Results The hy-drophobicity of the coatings was effectively improved by the incorporation of the fluorine and silicon components. The normal, fluor-inated and silicone acrylic polyurethane coatings had stable hydrophobicity and glossiness in environments with a temperature below 100 ℃. Among the three coatings, the fluorinated coating failed most slowly in the xenon lamp aging test, and the silicone coating failed most slowly in the high-temperature environment ( 150 ℃) . Hydrothermal environment had no significant influence on the contact angle and glossiness of all the three coatings. Conclusion Fluorinated coating showed better resistance to photo-aging, while silicone coating had better resistance to the high-temperature environment.