A_2和B_3型单体缩聚合成超支化偶氮聚氨酯研究  

SYNTHESIS AND CHARACTERIZATION OF A HYPERBRANCHED AZO POLYURETHANE

作　　者：车鹏超[1] 和亚宁[1] 王晓工[1] 

机构地区：[1]清华大学材料科学与工程研究院化工系高分子研究所,北京100084

出　　处：《高分子学报》2007年第1期21-25,共5页Acta Polymerica Sinica

基　　金：国家自然科学基金(基金号50533040;50273018)资助项目

摘　　要：通过双官能度异氰酸酯基单体MDI(A2)与三官能度羟基偶氮单体(B3)的缩聚反应,得到了超支化偶氮聚氨酯,利用核磁共振、热分析、紫外-可见光谱、红外光谱、GPC等方法对其结构和性能等进行了详细表征.该聚合物在干涉的p偏振Ar+激光照射下,可得到周期性规则的正弦波形表面起伏光栅.A hyperbranched azo polyurethane was synthesized by an A2 type monomer MDI and a B3 type monomer 4-（ N, N＇-bis（2-hydroxyethyl））amino-2＇-hydroxyethoxyl-4＇-nitryl-azobenzene .The azo polymer was characterized by ^1H-NMR, UV-Vis spectrum and thermal analysis. The λmax of the polymer in DMF solution was determined to be 488 nm.The number average molecular weight determined by GPC is Mn = 9300 with a polydispersion index 1.9. The glass transition temperature （ Tg ） of the polymer is 131 ℃ determined from DSC thermogram. The results showed the azo polyurethane has been successfully synthesized through this scheme. Surface-relief-gratings （SRGs） were observed on the polymer film after irradiated by an interference pattern of Ar^＋ laser beam for 1000 s. The surface modulation depth and the grating spacing were measured by AMF to be 67 nm and 770 nm, respectively.

关 键 词：超支化 偶氮聚氨酯 A2加B39 表面起伏光栅 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]