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Application of epoxy functionalized acrylic ester polymer

An acrylate and epoxy-functional technology, which is applied in the application field of epoxy-functionalized acrylate polymers, can solve the problems of high hazard, difficulty in obtaining, and long preparation route, and achieve low toxicity and increased compatibility , the effect of increasing the molecular weight

Inactive Publication Date: 2011-04-20
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, isocyanates are very harmful to the human body and pollute the environment
[0005] Bikiaris (Polymer Chemistry, 1996, 34 (7): 1337-1342) etc. use self-synthesized several diglycidyl ester compounds containing imide rings to carry out chain extension to PET and PBT. This chain extender has good Thermal stability, but the preparation route is relatively long, not easy to obtain
[0006] An epoxy-functionalized acrylate polymer used for polylactic acid modification and chain extension has not been reported yet

Method used

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  • Application of epoxy functionalized acrylic ester polymer
  • Application of epoxy functionalized acrylic ester polymer
  • Application of epoxy functionalized acrylic ester polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1) Preparation of an epoxy-functionalized acrylate polymer:

[0047] components

parts by weight

toluene

30

Methyl methacrylate

64.4

Glycidyl methacrylate

5.6

Di-tert-butyl peroxide

0.16

n-Dodecyl Mercaptan

0.04

[0048] Batch polymerization: According to the formula, mix the raw material components evenly, mix 900 grams of toluene, 2032 grams of methyl methacrylate, 168 grams of glycidyl methacrylate, 4.8 grams of di-tert-butyl peroxide, n-dodecyl sulfide 1.2 grams of alcohol, mixed evenly and added to a 5-liter reactor, using a Milton Roy model feeding pump to add to the reactor, stirring at a stirring speed of 160r / min, using nitrogen or other inert gases to fully replace the air in the reactor , using an oil bath to heat up the temperature, the oil bath temperature is constant at 120 ° C, and after the reaction is carried out for 3 hours from the oil bath temperature rise, the mixed mater...

Embodiment 2

[0052] 1) Preparation of an epoxy-functionalized acrylate polymer:

[0053] components

parts by weight

toluene

10

Methyl methacrylate

88.2

Glycidyl methacrylate

1.8

Di-tert-butyl peroxide

0.04

n-Dodecyl Mercaptan

0.24

[0054] Polymerization method is with embodiment 1.

[0055] 2) Weigh 49.5g of polylactic acid and 5.5g of epoxy-functionalized acrylate polymer and melt blend them in a Haake torque rheometer. The reaction temperature is 180°C, the speed is 60r / min, and the mixing time is 10min. The measured weight-average molecular weight, equilibrium torque value, and glass transition temperature of the polylactic acid modified by chain extension are listed in Table 1.

Embodiment 3

[0057] 1) Preparation of an epoxy-functionalized acrylate polymer:

[0058] components

parts by weight

toluene

30

Methyl methacrylate

68.6

Glycidyl methacrylate

1.4

Di-tert-butyl peroxide

0.16

n-Dodecyl Mercaptan

0.04

[0059] Polymerization method is with embodiment 1.

[0060] 2) Weigh 48.4g of polylactic acid and 6.6g of epoxy-functionalized acrylate polymer and melt blend them in a Haake torque rheometer. The reaction temperature is 180°C, the speed is 60r / min, and the mixing time is 10min. The measured weight-average molecular weight, equilibrium torque value, and glass transition temperature of the polylactic acid modified by chain extension are listed in Table 1.

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Abstract

The invention relates to application of an epoxy functionalized acrylic ester polymer. The acrylic ester polymer is used for a polylactic-acid modified chain extender, has little toxicity without volatility, contains a plurality of epoxy functional groups, and can chemically react with polylactic acid molecular chains in melt blending with polylactic acid and connect two or more than two polylactic acid molecular chains through a chemical bond to greatly improve the molecular weight of the polylactic acid, and the compatibility between the polylactic acid and the acrylic ester polymer is enhanced because of the chemical reaction between the polylactic acid and the acrylic polymer. The modified polylactic acid has the weight-average molecular weight from 367,000 to 505,000, the vitrification conversion temperature from 64.2 DEG C to 66.4 DEG C and the balance torque value from 5.1 N*m to 9.8 N*m and is suitable for subsequent processing.

Description

technical field [0001] The invention relates to the application of an epoxy functionalized acrylate polymer. Background technique [0002] Polylactic acid (PLA) is a non-toxic, non-irritating polymer material with good biodegradability and biocompatibility. It can be decomposed into carbon dioxide and water in the natural environment due to hydrolysis or microbial degradation. Moreover, its raw material can be prepared by fermentation of starch, etc., and is a recyclable green and environmentally friendly plastic. However, polylactic acid is brittle and has poor impact resistance, so it is necessary to modify polylactic acid in some applications. In particular, the relative molecular weight of polylactic acid obtained by the direct polycondensation method is very low, so the method of chain extension by chemical reaction during processing is widely used. [0003] Woo et al. (Polym Bull, 1995. VOL.35, NO.4, P415) first reported the melt chain extension method of diisocyana...

Claims

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Application Information

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IPC IPC(8): C08F220/14C08F220/32C08F220/18C08G63/91C08L67/04C08L33/12C08L33/08
Inventor 谭志勇李外张会轩杨海东张明耀吴广峰孙树林周超
Owner CHANGCHUN UNIV OF TECH
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