Effect of TiO2 on the Photodegradation Mechanism of Poly(butylene succinate)  

作　　者：崔春娜 黄继涛 颜桂炀 阚海峰 

机构地区：[1]Chemistry Department of Ningde Normal University [2]Department of Chemistry, Fujian Province University Key Laboratory of Green Energy and Environment Catalysis, Ningde Normal University [3]Fujian Key Laboratory of Polymer Materials [4]State Key Laboratory of Structural Chemistry

出　　处：《Chinese Journal of Structural Chemistry》2017年第2期338-345,共8页结构化学（英文）

基　　金：supported by the Natural Science Foundation of Fujian Province(2016J01740);National Natural Science Foundation of China(21473096);State Key Laboratory of Structural Chemistry(20150010);the Guiding Project of Fujian Province(2016Y0073)

摘　　要：The photodegradation behaviors of poly（butylene succinate）（PBS） and TiO2/PBS nanocomposite were monitored over a period of six months. Material properties and aging mechanisms were studied and explored by various characterizations including 1HNMR, FTIR, XRD, mass spectrum, and TGA. The TiO2/PBS nanocomposite was found to be more thermally stable and mechanically robust than the PBS. During aging, crystal formation and the final crystal structure changed notably. Based on the characterization results, it is proposed that the polymer chains have cleaved at the ester linkage by the dissociation of O–H groups and the conversion of C=O to C–O bonds. It was also believed that polymer chain transfer took place, which resulted in the formation of C=C bonds and O–H groups, and the polyester changed to enol or polyether.The photodegradation behaviors of poly（butylene succinate）（PBS） and TiO2/PBS nanocomposite were monitored over a period of six months. Material properties and aging mechanisms were studied and explored by various characterizations including 1HNMR, FTIR, XRD, mass spectrum, and TGA. The TiO2/PBS nanocomposite was found to be more thermally stable and mechanically robust than the PBS. During aging, crystal formation and the final crystal structure changed notably. Based on the characterization results, it is proposed that the polymer chains have cleaved at the ester linkage by the dissociation of O–H groups and the conversion of C=O to C–O bonds. It was also believed that polymer chain transfer took place, which resulted in the formation of C=C bonds and O–H groups, and the polyester changed to enol or polyether.

关 键 词：chains dissociation thermally polyester bonds succinate crystallinity biodegradable monitored conjugated 

分 类 号：TB332[一般工业技术—材料科学与工程] O644.1[理学—物理化学]