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.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
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
