Method for preparing linear polyester-imides and thermal-optical property usage thereof

A linear polyurethane and imide technology, which is applied in the field of preparation of new polyurethane-imide materials, can solve the problems of thermo-optic switch and light-switching array research that are not mentioned, and achieves high PI glass transition temperature and film formation. The effect of good performance and high thermal stability

Inactive Publication Date: 2008-03-05
JIANGSU UNIV
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  • Method for preparing linear polyester-imides and thermal-optical property usage thereof
  • Method for preparing linear polyester-imides and thermal-optical property usage thereof

Examples

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Embodiment 1

[0015] Example 1 At room temperature, add 7.2mmol TDI and 15mL DMF to a four-necked flask equipped with a reflux condenser and a nitrogen inlet, stir rapidly, and slowly add 3.0mmol DR-19 DMF solution dropwise. After the dropwise addition, raise the temperature to 90°C to react for 40 Minutes to obtain a polyurethane prepolymer terminated with -NCO. Cool in an ice bath, add 4.8 mmol of dianhydride PMDA, raise the temperature to 40°C for 4 hours, then raise the temperature to 90°C and reflux for 5 hours, the product is precipitated into methanol aqueous solution (volume ratio: 1:1), suction filtered, and vacuum dried , to obtain the red polyurethane-imide (PUI) material TIP-1 containing nonlinear optical groups in the side chain.

Embodiment 2

[0016] Example 2 At room temperature, add 7.2mmol TDI and 15mL DMF to a four-necked flask equipped with a reflux condenser and a nitrogen inlet, stir rapidly, and slowly add 4.8mmolDR-1 DMF solution dropwise. After the dropwise addition, raise the temperature to 40°C for reaction 3 hours, to obtain -NCO-terminated polyurethane prepolymer. Cool in an ice bath, add 2.4 mmol of dianhydride BPDA, heat up to 110°C for 40 minutes, then heat up to 200°C and reflux for 1 hour. The product is precipitated into aqueous methanol (volume ratio: 1:1), filtered with suction, After vacuum drying, a red polyurethane-imide (PUI) material TIP-2 containing nonlinear optical groups in the side chain was obtained.

Embodiment 3

[0017] Example 3 At room temperature, add 7.2mmol TDI and 15mL DMF to a four-necked flask equipped with a reflux condenser and a nitrogen inlet, stir rapidly, and slowly add 4.0mmol DR-19 DMF solution dropwise. After the dropwise addition, raise the temperature to 70°C to react 1.5 hours, to obtain -NCO-terminated polyurethane prepolymer. Cool in an ice bath, add 3.2 mmol of dianhydride BTDA, heat up to 90°C and react for 2 hours, then heat up to 160°C and reflux for 2.5 hours, the product is precipitated into methanol aqueous solution (1:1 by volume), and suction filtered , after vacuum drying, the red polyurethane-imide (PUI) material TIP-3 containing nonlinear optical groups in the side chain was obtained.

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Abstract

The present invention relates to one kind of polyurethane-imide (PUI) material and it preparation process and application. The PUI material is prepared in N, N-dimethyl formamide (DMF) solvent with TDI and DR-19 or DR-1 with active hydroxyl radical, and through pre-polymerization to form pre-polymer with non-linear chromogenic molecule and -NCO terminal, and the subsequent polycondensation reaction of the pre-polymer and maleic anhydride monomer first at 40-110 deg.c for 40 min to 4 hr and then reflux at 90-200 for 1-5 hr. The PUI material as one polymer material containing non-linear optical radical has non-linear optical property, high heat stability and great thermo-optical coefficient, and may find broad application in integrated optics, logic optics, thermo-optical switch, etc.

Description

technical field [0001] The invention relates to a preparation method of a novel polyurethane-imide (PUI) material with high thermal stability, good optical transparency and high thermo-optical performance and its application in integrated optics, logic optical path, thermo-optic switch and light-on array. Background technique [0002] In recent years, using the characteristics of high thermo-optic effect of organic polymer materials, some world-renowned large companies, research institutes and universities at home and abroad have developed thermo-optic switches and switching arrays. The design basis of such devices is polymer The thermo-optic effect of the waveguide. Therefore, the study of organic polymer materials with large thermo-optic coefficients is of great significance for the development of high-performance optical switches. Effective means of optical materials. [0003] Organic polarized polymer systems containing chromogenic molecules mainly include polyacrylate ...

Claims

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Application Information

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IPC IPC(8): C08G18/83C08G18/10H03K17/00
Inventor 邱凤仙杨冬亚张勤勤吴冬梅
Owner JIANGSU UNIV
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