A linear polyurethane elastomer toughening agent for toughening biological polyester pha and its preparation method and application

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

Active Publication Date: 2016-11-02
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 order to determine the time to add the chain extender to complete the subsequent chain extension reaction. Complicated and the addition of catalysts often reduces the mechanical properties of synthetic polyurethanes to varying degrees

Method used

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  • A linear polyurethane elastomer toughening agent for toughening biological polyester pha and its preparation method and application
  • A linear polyurethane elastomer toughening agent for toughening biological polyester pha and its preparation method and application
  • A linear polyurethane elastomer toughening agent for toughening biological polyester pha and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0045] A method for preparing a linear polyurethane elastomer toughening agent for toughening biopolyester PHA, comprising the following steps: the hard segment content of the linear polyurethane elastomer toughening agent for synthesizing toughened biopolyester PHA is scheduled to be 35%, According to the formula calculation formula, accurately measure 10g of polycaprolactone diol (PCL, molecular weight 1000) after drying, 0.9129g of 1,4-butanediol (BD), and 4.4718g of isophorone diisocyanate (IPDI) Put it into a three-necked flask, use a vacuum method to isolate the air, heat it to 80℃ with oil bath heating, magnetically stir, and react for 2h, then transfer the reaction solution into a mold, put it in a vacuum oven and expand at 125℃. Chaining, deaeration, and after curing for 12 hours, take it out to obtain a linear polyurethane elastomer toughening agent with a hard segment content of 35%; the formula calculation formula is as follows:

[0046] W IPDI / M IPDI =W PCL / M PCL...

Embodiment 2

[0061] A preparation method of a linear polyurethane elastomer toughening agent for toughening biopolyester PHA, comprising the following steps: the hard segment content of the linear polyurethane elastomer toughening agent for synthesizing toughened biopolyester PHA is scheduled to be 45%, According to the formula calculation formula, accurately measure the dried polycaprolactone diol (PCL, molecular weight 2000) 10g, 1,4-butanediol (BD) 1.7198g and isophorone diisocyanate (IPDI) 6.4622g together Put it into a three-necked flask, isolate the air by vacuuming, heat to 60℃ with oil bath heating, stir magnetically, and react for 3h, then transfer the reaction liquid into a mold, put it in a vacuum oven at 100℃ for expansion Chaining, deaeration, and curing for 24h, take it out to obtain a linear polyurethane elastomer toughening agent with a hard segment content of 45%; the formula calculation formula is as follows:

[0062] W IPDI / M IPDI =W PCL / M PCL +W BD / M BD ,

[0063]

...

Embodiment 3

[0078] A method for preparing a linear polyurethane elastomer toughening agent for toughening biopolyester PHA, comprising the following steps: the hard segment content of the linear polyurethane elastomer toughening agent for synthesizing toughened biopolyester PHA is 60%, According to the formula calculation formula, accurately measure 10g of polycaprolactone diol (PCL, molecular weight 3000) after drying, 3.6858g of 1,4-butanediol (BD) and 11.3142g of isophorone diisocyanate (IPDI) Put it into a three-necked flask and use N 2 Isolate the air, heat to 70℃ with oil bath heating method, magnetically stir, and react for 2.5h, then transfer the reaction liquid into the mold, put it in a vacuum oven at 110℃ for chain extension and degassing, after curing for 18h Take it out to obtain a linear polyurethane elastomer toughening agent with a hard segment content of 60%; the formula calculation formula is as follows:

[0079] W IPDI / M IPDI =W PCL / M PCL +W BD / M BD ,

[0080]

[008...

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PUM

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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 a toughened biodegradable polyester, in particular to a linear polyurethane elastomer toughening agent for toughening biopolyester PHA, and a preparation method and application thereof. Background technique [0002] Biodegradable materials come from the natural world, and can return to the natural world after being used and discarded. They have good ecological environment coordination and development potential. Among many bio-based materials, polyhydroxy fatty acid esters have attracted much attention from researchers because of their complete biodegradability. Polyhydroxyalkanoate (PHA) is a general term for a class of thermoplastic polyesters synthesized by microbial fermentation. The main representatives are poly-3-hydroxybutyrate (PHB), copolymers of 3-hydroxybutyric acid and 3-hydroxyvaleric acid (PHBV) and 3-hydroxybutyric acid and 4-hydroxybutyric acid copolymer (P(3,4)HB). PHA has excellent properties such as biodegradabil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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