Novel block macromolecular material and preparation method thereof

A technology of block polymers and polymers, applied in the field of block polymer materials and their preparation

Inactive Publication Date: 2007-10-31
SHANTOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there are no reports on block copolymers prepared from polymeric substrates

Method used

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  • Novel block macromolecular material and preparation method thereof
  • Novel block macromolecular material and preparation method thereof
  • Novel block macromolecular material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Preparation of low molecular weight PHB fragments

[0053] Weigh 2.5g of PHB polymer (Jiangsu Nantian Group) with a molecular weight of 500,000 in a 100ml round bottom flask, add 50mL of CHCl 3 , condensed and refluxed in an oil bath at 65°C for about 120min, let the PHB dissolve slowly, and added 1mL of concentrated H 2 SO 4 Put it into the above solution, raise the temperature and reflux for 30min, transfer the above solution to a separatory funnel after cooling, add about 15mL of distilled water to wash, add anhydrous MgSO 4 Water was removed and the filtered solution was distilled to remove CHCl 3 , to obtain PHB solids, add water to wash the PHB solids, and filter to obtain 1.3 g of PHB fragments with a molecular weight of 2000 for the preparation of block copolymers. NMR (500MHz, CDCl 3 ): δppm 1.3 (CH 3 ), 2.5-2.6 (CO-CH 2 ), 5.2-5.3 (COO-CH).

Embodiment 2

[0055] Preparation of low molecular weight PHB diol fragments

[0056] Weigh 2.5g of PHB (Jiangsu Nantian Group) polymer with a molecular weight of 500,000 in a 100mL round bottom flask, add 50mL of CHCl 3 and 5.0 mL of ethylene glycol. Condensate and reflux in an oil bath at 65°C for about 120 minutes to allow PHB to slowly dissolve. 1 mL of concentrated H was added dropwise 2 SO 4 Into the above solution, heat up and reflux for 30 minutes, and transfer the above solution to a separatory funnel after cooling. Add about 15mL of distilled water to wash, add anhydrous MgSO 4 In addition to water, the filtered solution was distilled to remove CHCl 3 , to obtain PHB solid. Water was added to wash the PHB solid, and filtered to obtain 1.3 g of PHB diol fragments with a molecular weight of 2000 for use in the preparation of block copolymers. NMR (500MHz, CDCl 3 ): δppm 1.3 (CH 3 ), 2.5-2.6 (CO-CH 2 ), 5.2-5.3 (COO-CH).

Embodiment 3

[0058] Preparation of low molecular weight PHBHHx diol fragments

[0059] Weigh 2.50g of PHBHHx polymer (Guangdong Lianyi Bioengineering Co., Ltd.) with a molecular weight of 750,000 in a 100mL round bottom flask, add 50mL of CHCl 3 and 5.0 mL of ethylene glycol. Condensate and reflux in an oil bath at 65°C for about 30 minutes, let PHBHHx dissolve slowly, add 1 mL of concentrated H 2 SO 4 into the above solution. Raise the temperature and reflux for 10 min, and transfer the above solution to a separatory funnel after cooling. Add about 15mL of distilled water to wash, add anhydrous MgSO 4 In addition to water, the filtered solution was distilled to remove CHCl 3 , to obtain PHB solid. Add water to wash the PHB solid, and filter to obtain 2.1 g of PHBHHx diol fragments with a molecular weight of 5000 for the preparation of block copolymers. NMR (500MHz, CDCl 3 ): δppm 0.9 (CH 3 ), 1.3 (CH 2 ), 2.5-2.6 (CO-CH 2 ), 5.2-5.3 (COO-CH).

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Abstract

The invention discloses a method of each block copolymer with Biopolyester PHA as base material, which comprises the following steps: cracking high molecular weight Biopolyester PHA to low molecular weight fragment or low molecular weight diatomic alcohol or diacid fragment of needed; connecting this fragments as block copolymer under the function of small molecule chain protecting agent; or utilizing PHA low-molecular polymer fragment as macromolecule trigger under warm condition; triggering other monomer polymerization reaction; even utilizing PHA and other macromolecule material; proceeding ester exchange under proper condition directly; getting the product. This product possesses special property and can meet the needs of biological medicine and organizing engineer, and on the other hand, the cheaper block copolymers used can decrease the selling price of PHA.

Description

technical field [0001] The invention relates to a block polymer material with a polymer material as a base material and a preparation method thereof. Background technique [0002] Block copolymers (Block Copolymers) are a class of polymer materials developed and widely used in the 1950s and 1960s, and they are one of the successful examples of polymer modification. With a special structure and very special properties, the most typical applications are the thermoplastic elastomers we use, modified compatibilizers, etc. However, the existing block copolymers are formed by copolymerization of two or more low-molecular monomers. So far, there is no report on block copolymers prepared from polymer substrates. [0003] Aliphatic polyesters are the most important biodegradable and biocompatible materials widely used in agriculture, coatings, medicine (controlled release of drugs, medical implant materials, sutures, etc.), adhesives and packaging industries. The most representati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00
Inventor 许开天陈国强黎松巫林平李子彪刘巧燕罗容聪
Owner SHANTOU UNIV
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