Linear polyurethane elastomer toughener toughening biopolyester PHA, and preparation method and application thereof

A technology of polyurethane elastomer and bio-polyester is applied in the field of toughening biodegradable polyester, which can solve the problems of reduced mechanical properties of polyurethane and complicated processes, and achieve the effects of improved mechanical properties, simple raw materials and improved toughness

Active Publication Date: 2014-11-05
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In addition, most of the current polyurethanes are prepared by pre-polymerization method, which requires adding a catalyst during the synthesis process and testing the degree of reaction of the isocyanate group (NCO) in orde

Method used

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  • Linear polyurethane elastomer toughener toughening biopolyester PHA, and preparation method and application thereof
  • Linear polyurethane elastomer toughener toughening biopolyester PHA, and preparation method and application thereof
  • Linear polyurethane elastomer toughener toughening biopolyester PHA, and preparation method and application thereof

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Experimental program
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Embodiment 1

[0045] A preparation method of a linear polyurethane elastomer toughening agent for toughening biological polyester PHA, comprising the steps of: pre-synthesizing a hard segment content of 35% of the linear polyurethane elastomer toughening agent for toughening biological polyester PHA, Accurately measure 10g of dried polycaprolactone diol (PCL, molecular weight 1000) and 0.9129g of 1,4-butanediol (BD) and 4.4718g of isophorone diisocyanate (IPDI) according to the formula calculation formula Add it into a three-necked flask, use vacuum to isolate the air, heat it to 80°C by heating in an oil bath, and stir it magnetically. After reacting for 2 hours, transfer the reaction solution into a mold, and put it in a vacuum oven at a temperature of 125°C for expansion. Chain, defoaming, take out after solidifying for 12h, obtain the linear polyurethane elastomer toughening agent that hard segment content is 35%; Described formula calculation formula is as follows:

[0046] W IPDI / M ...

Embodiment 2

[0061] A preparation method of a linear polyurethane elastomer toughening agent for toughening biological polyester PHA, comprising the steps of: pre-synthesizing a hard segment content of 45% of the linear polyurethane elastomer toughening agent for toughening biological polyester PHA, Accurately measure 10g of dried polycaprolactone diol (PCL, molecular weight 2000) and 1.7198g of 1,4-butanediol (BD) and 6.4622g of isophorone diisocyanate (IPDI) according to the formula calculation formula Add it into a three-necked flask, use vacuum to isolate the air, heat it to 60°C by heating in an oil bath, and stir it magnetically. After reacting for 3 hours, transfer the reaction solution into a mold, and put it in a vacuum oven at a temperature of 100°C. Chain, defoaming, take out after curing 24h, obtain the hard segment content and be the linear polyurethane elastomer toughening agent of 45%; Described formula calculation formula is as follows:

[0062] W IPDI / M IPDI =W PCL / M ...

Embodiment 3

[0078] A preparation method of a linear polyurethane elastomer toughening agent for toughening bio-polyester PHA, comprising the steps of: pre-synthesizing a hard segment content of 60% of the linear polyurethane elastomer toughening agent for toughening bio-polyester PHA, Accurately measure 10g of dried polycaprolactone diol (PCL, molecular weight 3000) and 3.6858g of 1,4-butanediol (BD) and 11.3142g of isophorone diisocyanate (IPDI) according to the formula calculation formula Add to the three-necked flask, adopt N 2 The method is to isolate the air, heat to 70°C with an oil bath heating method, and stir it magnetically. After 2.5 hours of reaction, transfer the reaction liquid into a mold, put it in a vacuum oven at a temperature of 110°C for chain extension and defoaming, and cure for 18 hours. Take out, obtain hard segment content and be the linear polyurethane elastomer toughening agent of 60%; Described formula calculation formula is as follows:

[0079] W IPDI / M IP...

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Abstract

The invention discloses a linear polyurethane elastomer toughener toughening biopolyester PHA, and a preparation method and an application thereof, and belongs to the field of toughening of biodegradable polyesters. The preparation method comprises the following steps: injecting polycaprolactone diol, 1,4-butanediol and isophorone diisocyanate into a die under vacuumization or nitrogen protection conditions by adopting a catalyst-free one step synthesis process, and completing a chain extension reaction in a vacuum oven to prepare the degradable polyurethane elastomer toughener with different hard segment contents. The application of the toughener is characterized in that industrially produced biodegradable polyester PHA and the synthesized PU with different hard segment contents are mixed, a solvent is added, a solution casting process is adopted, ultrasonic treatment and a shaker are adopted to realize uniform mixing, and the obtained mixture is injected to a die, and undergoes film formation. Compared with pure brittle PHA, the PHA/PU composite film has greatly increased elongation at break, has an obvious toughening effect on the PHA due to the PU with different hard segment contents, can improve the comprehensive mechanical properties, obviously improves the toughness, and opens up a new way for the practical application of the PHA material.

Description

technical field [0001] The invention relates to toughening biodegradable polyester, in particular to a linear polyurethane elastomer toughening agent for toughening biopolyester PHA and its preparation method and application. Background technique [0002] Biodegradable materials come from nature and can be returned to nature after being used and discarded, which has good ecological environment coordination and development potential. Among many bio-based materials, polyhydroxyalkanoate has attracted much attention of researchers because of its complete biodegradability. Polyhydroxyalkanoate (PHA) is a general term for a class of thermoplastic polyesters synthesized by microbial fermentation, the main representative is a copolymer of poly 3-hydroxybutyrate (PHB), 3-hydroxybutyric acid and 3-hydroxyvaleric acid (PHBV) and a copolymer of 3-hydroxybutyrate and 4-hydroxybutyrate (P(3,4)HB). PHA has excellent properties such as biodegradability, biocompatibility, and optical acti...

Claims

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Application Information

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IPC IPC(8): C08G18/75C08G18/66C08G18/42C08G18/32C08L67/04C08L75/06C08J5/18
CPCC08G18/3206C08G18/4277C08G18/664C08G18/755C08G2230/00C08J5/18C08J2367/04C08J2475/06C08L67/04C08L2201/06C08L2203/16C08L75/06
Inventor 张蕤苏天翔方明锋
Owner NANJING FORESTRY UNIV
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