High-mechanical-performance degradable polyurethane material based on isosorbide and polylactic acid and synthesis method of high-mechanical-performance degradable polyurethane material

A polyurethane material and isosorbide technology, applied in the field of polymers, can solve problems such as low mechanical properties, and achieve the effects of improving mechanical properties, solving the problem of small molecular weight and mild reactivity

Active Publication Date: 2016-07-27
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing polyurethanes that use aliphatic diisocyanates as coupling age...

Method used

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  • High-mechanical-performance degradable polyurethane material based on isosorbide and polylactic acid and synthesis method of high-mechanical-performance degradable polyurethane material
  • High-mechanical-performance degradable polyurethane material based on isosorbide and polylactic acid and synthesis method of high-mechanical-performance degradable polyurethane material

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Experimental program
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Embodiment 1

[0019] The synthetic method of the degradable polyurethane material with high mechanical properties based on isosorbide and polylactic acid comprises the following steps:

[0020] (1) Synthesis of polylactic acid-based macromolecular diol: mix isosorbide and DL-lactide at a molar ratio of 1:50, and mix in Sn(Oct) 2 Catalyzed at 140°C and reacted under vacuum for 24 hours, then purified twice with dichloromethane and n-hexane co-precipitation system, and obtained polylactic acid-based macromolecular diol after vacuum drying; the obtained polylactic acid-based macromolecular diol was tested by nuclear magnetic resonance Its weight-average molecular weight measured by method is 7910g / mol;

[0021] (2) Polyurethane material is synthesized: the polylactic acid-based macromolecular diol that step (1) obtains is fully dissolved in anhydrous toluene, press polylactic acid-based macromolecular diol: hexamethylene diisocyanate: isosorbide mol ratio is 1.0: 1.5: 0.5 Add hexamethylene ...

Embodiment 2

[0025] Based on the synthetic method of the high mechanical property degradable polyurethane material of isosorbide and polylactic acid, step (1) is identical with embodiment 1, and the synthetic method of polyurethane material of step (2) is as follows: the polylactic acid base that step (1) obtains is large The molecular diol is fully dissolved in anhydrous toluene, and the molar ratio of polylactic acid-based macromolecular diol: hexamethylene diisocyanate: isosorbide is 1.0: 1.1: 0.1. After reacting at low temperature for 5 hours, cool down to 30°C, then add isosorbide, react at 30°C for 2 hours, then raise the temperature to 50°C for 10 hours, and purify the product three times with toluene / absolute ethanol system. Gained product proves that this polyurethane material is successfully synthesized through nuclear magnetic resonance characterization (see figure 1 ), its weight-average molecular weight measured by gel permeation chromatography is 6.08×10 4 g / mol, the deg...

Embodiment 3

[0027] The synthetic method of the degradable polyurethane material of high mechanical properties based on isosorbide and polylactic acid, step (1) is identical with embodiment 1, and the synthetic method of polyurethane material of step (2) is as follows: the step (1) in the embodiment 1 is obtained The polylactic acid-based macromolecular diol is fully dissolved in anhydrous toluene, and the molar ratio of macromolecular diol: lysine diisocyanate: isosorbide is 1.0: 1.5: 0.5. After reacting for 3 hours, cool down to 50°C, then add isosorbide, react at 50°C for 2 hours, then raise the temperature to 70°C for 10 hours, and purify the product three times with toluene / absolute ethanol system. Gained product proves that this polyurethane material is successfully synthesized through nuclear magnetic resonance characterization (see figure 1 ), its weight-average molecular weight measured by gel permeation chromatography is 13.8×10 4 g / mol, the degree of crosslinking is 0, the ...

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Abstract

The invention discloses a high-mechanical-performance degradable polyurethane material based on isosorbide and polylactic acid and a synthesis method of the high-mechanical-performance degradable polyurethane material.The synthesis method of the high-mechanical-performance degradable polyurethane material includes the following steps that isosorbide serves as a co-initiator to initiate lactide ring opening polymerization to form polylactic-acid-based macromolecular diol, then aliphatic diisocyanate serves as a coupling agent, isosorbide serves as a chain extender, and the degradable polyurethane material based on isosorbide and polylactic acid is prepared through a two-step method.Isosorbide serves as the chain extender, so that the mechanical performance of the polyurethane material is improved while the reaction is controllable and no cross-linking occurs in the synthesis process of the polyurethane material.

Description

technical field [0001] The invention belongs to the field of macromolecules, and in particular relates to a degradable polyurethane material with high mechanical properties based on isosorbide and polylactic acid, and also relates to a synthesis method of the material. Background technique [0002] At present, the synthesis of degradable polyurethane mostly uses organic isocyanate or polyisocyanate and dihydroxy or polyhydroxy compound as basic raw materials, and is formed by chain extension of small molecule diol or diamine. The isocyanate includes aliphatic isocyanate, such as hexamethylene diisocyanate (HDI), lysine diisocyanate (LDI), and aromatic diisocyanate, such as toluene diisocyanate (TDI). Although aromatic diisocyanate can effectively improve the mechanical properties of polyurethane, it has cytotoxicity. Aliphatic dibasic primary amines such as butanediamine (BDA) and ethylenediamine (EDA) as chain extenders can improve the mechanical properties of polyurethane...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/42C08G18/32C08G63/08
CPCC08G18/3218C08G18/428C08G18/664C08G63/08C08G2230/00
Inventor 罗彦凤王远亮马宇飞
Owner CHONGQING UNIV
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