SYNTHESIS AND CHARACTERIZATION OF A HYPERBRANCHED AZO POLYURETHANE

CHE Pengchao; HE Yaning; WANG Xiaogong

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SYNTHESIS AND CHARACTERIZATION OF A HYPERBRANCHED AZO POLYURETHANE

Research Article | 更新时间：2021-03-19

- SYNTHESIS AND CHARACTERIZATION OF A HYPERBRANCHED AZO POLYURETHANE
- Acta Polymerica Sinica Issue 1, Pages: 21-25(2007)
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- Published：20 January 2007，
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CHE Pengchao, HE Yaning, WANG Xiaogong. SYNTHESIS AND CHARACTERIZATION OF A HYPERBRANCHED AZO POLYURETHANE. [J]. Acta Polymerica Sinica (1):21-25(2007)
DOI：

CHE Pengchao, HE Yaning, WANG Xiaogong. SYNTHESIS AND CHARACTERIZATION OF A HYPERBRANCHED AZO POLYURETHANE. [J]. Acta Polymerica Sinica (1):21-25(2007) DOI：

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.

Abstract

A hyperbranched azo polyurethane was synthesized by an A2type monomer MDI and a B3 type monomer-4-(N

N′-bis(2-hydroxyethyl))amino-2′-hydroxyethoxyl-4′-nitrylazobenzene.The azo polymer was characterized by1H-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B3表面起伏光栅

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