Photoactive polylactic acid acrylate degradation material

A technology of lactic acid acrylate and degradable materials, which can be used in applications, coatings, inks, etc., can solve the problems of limiting the use and promotion of polylactic acid, complicated processes, and high cost of polylactic acid, achieving excellent comprehensive performance, expanding the scope of application, and degrading The effect of speed reduction

Inactive Publication Date: 2014-08-27
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of polylactic acid prepared by the two-step method, that is, the lactide ring-opening method, is high and the process is complicated, and the c

Method used

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  • Photoactive polylactic acid acrylate degradation material

Examples

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Example Embodiment

[0030] Example 1:

[0031] Add 100 parts of lactic acid (purity> 95%) to the reaction kettle, vacuum control the pressure of the reaction system at 120°C under the condition of 50-30KPa, react for 2h, remove the water generated in the system to obtain polylactic acid prepolymer; Add 1 part of pentaerythritol and 0.5 part of SnCl to the system 2 +TSA (quality ratio SnCl 2 : TSA = 1:1) Composite catalyst, heat up to 180℃, keep the pressure in the reactor at 30~10 KPa, react for 8 hours to obtain hydroxyl-terminated polylactic acid. 100 parts of hydroxyl-terminated polylactic acid and 50 parts of toluene were added to the reaction kettle, the temperature was raised to 90°C, and 10 parts of acrylic acid, 0.5 parts of p-toluenesulfonic acid and 0.15 parts of hydroquinone polymerization inhibitor were gradually added in 0.5h. Then the temperature is raised to 130°C, the pressure in the reactor is maintained at 30-10 KPa, and the reaction is carried out for 5 hours to obtain activated p...

Example Embodiment

[0032] Example 2:

[0033] Add 100 parts of lactic acid (purity> 95%) to the reaction kettle, vacuum control the pressure of the reaction system at 120°C under the condition of 50-30KPa, react for 4 hours, remove the water generated in the system to obtain polylactic acid prepolymer; add 10 Part of diethylene glycol and 0.5 part of SnCl 2 +TSA (quality ratio SnCl 2 : TSA = 1:1) Composite catalyst, heat up to 140℃, keep the pressure in the reactor at 30~5 KPa, react for 4 hours to obtain hydroxyl-terminated polylactic acid; then add 100 parts of hydroxyl-terminated polylactic acid and 30 parts of toluene into the reactor , The temperature is raised to 90°C, and 30 parts of acryloyl chloride, 1 part of p-toluenesulfonic acid and 0.1 part of hydroquinone polymerization inhibitor are gradually added in 0.5h. Then the temperature was raised to 140℃, the pressure in the reactor was maintained at 30~5 KPa, and the double-bond active polylactic acid acrylate was obtained by reacting for ...

Example Embodiment

[0034] Example 3:

[0035] Add 100 parts of lactic acid (purity> 95%) to the reaction kettle, vacuum control the pressure of the reaction system at 120°C to control the pressure of the reaction system at 70-50KPa, react for 6 hours, remove the water generated in the system to obtain a polylactic acid prepolymer; add 35 Parts ethylene glycol, 0.5 parts SnCl 2 +TSA (quality ratio SnCl 2 : TSA = 1:1) Composite catalyst, heat up to 200℃, keep the pressure in the reactor at 50~30 KPa, react for 12h, and refine the reactant to obtain hydroxyl-terminated polylactic acid; then 100 parts of hydroxyl-terminated polylactic acid, 90 parts Toluene was added to the reactor, the temperature was raised to 90°C, and 1 part of methacrylic anhydride, 5 parts of p-toluenesulfonic acid and 0.5 parts of hydroquinone polymerization inhibitor were gradually added for 0.5h. Then the temperature was raised to 110°C, the pressure in the reactor was maintained at 50-30 KPa, and the reaction was carried out ...

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Abstract

The invention relates to a photoactive polylactic acid acrylate degradation material. Lactic acid and polyol are used as raw materials, and are processed through a melt polycondensation technology to prepare a hydroxyl-terminated polylactic acid prepolymer, and an acrylic acid monomer reacts with the hydroxyl-terminated polylactic acid prepolymer to prepare double bond-terminated photoactive polylactic acid acrylate. The molecular weight and the molecular structure of the photoactive polylactic acid acrylate can be adjusted by adjusting the kind and amount of polyol in order to improve the product performances. The prepared photoactive polylactic acid acrylate can be combined with an active diluent and a photoinitiator in order to realize crosslinking curing under UV irradiation, improve the thermal stability after curing and reduce the degradation rate. A one-step method is combined with a UV light curing technology in the invention, so a new approach is provided for the preparation of the photoactive polylactic acid acrylate degradation material, and a new direction is provided for the reasonable utilization of one-step synthesized low molecular weight polylactic acid.

Description

technical field [0001] The invention belongs to the field of biodegradable materials, in particular to a photoactive polylactic acid acrylate biodegradable material. Background technique [0002] Polylactic acid (PLA) is a biodegradable polyester-based material. Lactic acid, the raw material for synthesizing polylactic acid, comes from natural crops such as corn. After being discarded, the product can be degraded into water and carbon dioxide in the natural environment. Therefore, polylactic acid is biodegradable and recyclable. In addition, it has good biocompatibility and mechanical properties. excellent. The preparation process of polylactic acid mainly includes: one-step polymerization method (referred to as one-step method), and two-step polymerization method (referred to as two-step method). The one-step method is to directly polymerize refined lactic acid. This method is the earliest and simplest method for preparing polylactic acid. The one-step method for preparin...

Claims

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Application Information

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IPC IPC(8): C08F283/02C08G63/06C09D4/02C09J4/02C09D11/101
Inventor 赵西坡彭少贤吴涛寇志敏
Owner HUBEI UNIV OF TECH
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