中文摘要：

对放置在阳光环境中的塑木地板进行了材色和蠕变性能的研究。结果表明：放置四个月后，材料白度L^＊、红绿轴色品指数a^＊、黄蓝色轴色品指数b^＊分别增加了9．3、4．18、1．42，材料色差△E^＊为10．53，表明材料颜色变化大，影响美观和顾客喜好度。阳光环境中放置两个月、四个月后，材料的弯曲强度分别降低了10％和15％；蠕变试验中，25％应力水平后，材料的剩余强度分别降低了17．7％和21．9％；50％应力水平后，材料的剩余强度分别降低了28．6％和30％。而相同加载方式下，常温时，材料的剩余强度仅降低了0．6％和6．5％。阳光环境对材料的蠕变性能有一定影响，产生的应变为常温下的1．1—1．4倍。

英文摘要：

The color and creep behavior of wood-plastic composite （WPC） decking boards under the sun environment were tested. After four months placement, the results showed the L ^＊ ,a^＊, b^＊ （indicated the Lab color space） increased by 9. 3, 4. 18 and 1.42 respectively, and the material chromatic aberration △E ^＊ was 10. 53. Material color changed greatly which influenced the appearance and customer preference. The flexural strength reduced by 10% and 15% under the sun for two months and four months respectively. The modulus of rupture reduced by 17.7% and 21.9% at 25% stress lever and 28.6% and 30% at 50% stress lever in the sun environment for two months and four months. However, the modulus of rupture just reduced by 0. 6% and 6. 5% after the same loading way. The sun environment had effect on creep behavior about WPC and the strain was 1.1 - 1.4 times than the WPC at room temperature.