紫外辐照官能化HDPE及复合材料力学性能  

HDPE FUNCTIONALIZED BY ULTRAVIOLET IRRADIATION AND PROPERTIES OF THE COMPOSITES

作　　者：吴石山[1] 徐僖[2] 

机构地区：[1]南京大学化学化工学院,南京210093 [2]四川大学高分子研究所高分子材料工程国家重点实验室,成都610065

出　　处：《复合材料学报》2005年第5期60-63,共4页Acta Materiae Compositae Sinica

基　　金：国家重点基础研究专项经费资助(G1999064809)

摘　　要：研究了不同紫外光强下辐照的HDPE结构和性能变化。在相同的辐照环境温度和辐照时间下,引入HDPE分子链的C—O、C O和C(O)O等含氧基团数量随紫外光强提高而增加,提高紫外光强加快了HDPE的官能化,但辐照HDPE中的凝胶含量也有所增加。紫外辐照不影响HDPE的晶型和晶胞参数,但会引起它的熔融温度下降、结晶度提高以及亲水性的改善,其变化幅度随紫外光强提高而加大。辐照HDPE作为增容剂加到HDPE/PVA中,提高了复合材料的力学性能。较高紫外光强下辐照的HDPE表现出更好的增容作用。The effects of ultraviolet light intensity on the structure and properties of HDPE were studied. Some oxygen containing groups such as C-O, C=O and C（=O）O were introduced onto the HDPE chains by ultraviolet irradiation in air without adding any additives. These groups content and gel contents in the irradiated HDPE increase with the irradiation light intensity under the same irradiation time and environmental temperature. Under the ultraviolet light intensity, the crystal style and cell parameter of irradiated HDPE remain unchanged; the melting temperature and water contact angle of HDPE decrease, while the degree of crystallinity increases, and their variation amplitude increases with the ultraviolet light intensity. Compared with those of HDPE/PVA composites, the mechanical properties of HDPE/PVA composites compatibilized with irradiated HDPE increased. The compatibilization of HDPE irradiated at high ultraviolet light intensity in HDPE/PVA composites is better than that at low ultraviolet light intensity.

关 键 词：紫外光强 含氧基团 HDPE/PVA复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]