Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of polyglycolic acid material and its preparation method and application

A technology of polyglycolic acid and diethyl oxalate, which is applied in the preparation of carboxylic acid amides, chemical instruments and methods, preparation of organic compounds, etc., can solve the problems of decreased mechanical properties of materials, decreased molecular weight of ester polymers, etc.

Active Publication Date: 2022-01-11
JIANGNAN UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the presence of organic carboxylates will lead to a substantial reduction in the molecular weight (degradation) of the ester polymer, resulting in a decrease in the mechanical properties of the material.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of polyglycolic acid material and its preparation method and application
  • A kind of polyglycolic acid material and its preparation method and application
  • A kind of polyglycolic acid material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] In a 500mL three-neck flask, add 15mL diethyl oxalate, 200mL ethanol, 9mL ethanolamine, and 6mL n-propylamine, react at 50°C for 24h, filter to obtain the solid component, wash with ethanol several times, and then dry in a vacuum oven for 24h to obtain terminal functional groups Compound Intermediate A: N 1 -(2-Hydroxyethyl)-N 2 - Propyloxamide, namely:

[0052]

[0053] Weigh glycolide and N at a mass ratio of 100:1 1 -(2-Hydroxyethyl)-N 2 - Propyl oxalamide, add 0.5wt% stannous octoate, melt reaction at 135° C. for 24 hours under vacuum and reduced pressure atmosphere to obtain a white solid, and obtain a new polyglycolic acid material after drying (yield 86.8%).

[0054] figure 1 It is the proton nuclear magnetic spectrum of the terminal functional group compound intermediate product A of the gained of the present embodiment, and its data are as follows: 1 H NMR (400MHz, DMSO) δ8.65–8.50 (m, 2H), 4.76 (t, 1H), 3.45 (q, 2H), 3.21 (q, 2H), 3.08 (q, 2H), 1.54-1....

Embodiment 2

[0058] In a 500mL three-neck flask, add 50mL diethyl oxalate, 200mL ethanol, and 10mL ethylenediamine, react at 50°C for 24h, filter to obtain the solid component, wash with ethanol several times, and then dry it in a vacuum oven for 24h to obtain intermediate product B , Weigh the intermediate product B, ethanolamine and n-propylamine at a molar ratio of 10:1:1.1, slowly add the intermediate product B / chloroform solution dropwise to the tetrahydrofuran solution containing excess ethanolamine and n-propylamine using a constant pressure dropping funnel, heat and stir, Reflux for 24h to obtain a white suspension, filter, wash and dry to obtain the compound intermediate product C:N 1 -(2-Hydroxyethyl)-N 2 -(2-(2-Oxo-2-(propylamino)acetamido)ethyl)oxamide, namely:

[0059]

[0060] Weigh glycolide and N at a mass ratio of 100:1 1 -(2-Hydroxyethyl)-N 2 -(2-(2-Oxo-2-(propylamino)acetamido)ethyl)oxalamide, add 0.5wt% stannous octoate, and melt at 135°C for 24 hours under vacuum...

Embodiment 3

[0074] Example 3 explores the influence of different primary amine compounds on the prepared polyglycolic acid material

[0075] Referring to Example 1, the n-propylamine was replaced by the primary amine compound shown in Table 2, and other process conditions remained unchanged to prepare the corresponding polyglycolic acid material.

[0076] The performance results of the obtained materials are shown in Table 2.

[0077] The performance result of the polyglycolic acid material that table 2 different primary amine compounds make

[0078]

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
crystallization timeaaaaaaaaaa
crystallinityaaaaaaaaaa
crystallinityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a polyglycolic acid material, a preparation method and application thereof, and belongs to the technical field of polymer materials. In the process of synthesizing polyglycolic acid, a hydrogen bond group with self-assembly nucleation is introduced at the end group of the polyglycolic acid to obtain terminal functional group polyglycolic acid containing one or more hydrogen bond groups. During the cooling process or constant temperature process, polyglycolic acid can undergo self-nucleation through the hydrogen bonding between hydrogen bond groups, and induce the rapid crystallization of polyglycolic acid chain segments to obtain polyglycolic acid with high crystallinity. This new type of polyglycolic acid has the characteristics of high crystallization temperature, fast crystallization rate, and short semi-crystallization time, which can shorten the molding cycle, reduce costs, and improve performance. Moreover, its preparation method is simple, environmentally friendly, and easy to realize industrialization. It can be widely used in packaging, textiles, medical consumables, disposable plastic products or agricultural fields, and has broad prospects.

Description

technical field [0001] The invention relates to a polyglycolic acid material and its preparation method and application, belonging to the technical field of polymer materials. Background technique [0002] Polyglycolic acid (PGA) materials have a wide range of application prospects in various fields due to their outstanding advantages such as wide source of raw materials, light weight, and good barrier properties. However, some inherent shortcomings of polyglycolic acid materials (such as brittle materials, poor crystallization properties during molding, large grain size, etc.) limit the wider development and application of polyglycolic acid materials. [0003] At present, adding fillers is the simplest and most effective way to improve the toughness and crystallization properties of polyglycolic acid materials, but the added fillers are likely to cause uneven dispersion in the matrix, easy to agglomerate, and poor compatibility with polyglycolic acid; when the amount added ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/685C07C231/02C07C233/18C07C231/14C07C233/36
CPCC08G63/6852C07C231/02C07C231/14C08G2230/00C07C233/18C07C233/36
Inventor 马丕明余鳗漫徐鹏武杨伟军东为富钮德宇
Owner JIANGNAN UNIV