Polylactic acid toughening modifier and preparation method thereof

A technology of toughening modifier and polylactic acid, applied in the field of polylactic acid toughening modifier and its preparation, can solve the problems of too fast reaction, difficult operation, toxicity and the like, achieve good compatibility, save production cost, Low energy consumption effect

Inactive Publication Date: 2011-01-05
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of diisocyanate chain extenders will make the reaction too fast and difficult to operate; in addition, if the product purification effect is not good, the material will have certain toxicity, which limits its wide application in some fields

Method used

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  • Polylactic acid toughening modifier and preparation method thereof
  • Polylactic acid toughening modifier and preparation method thereof
  • Polylactic acid toughening modifier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 70 parts by mass of lactide and 30 parts by mass of PBS into the reaction flask, use toluene as solvent, add the catalyst stannous octoate accounting for 0.1% of the total mass of lactide and PBS, and raise the temperature to 150°C under nitrogen protection for 4.5 h. After the reaction is finished, the solvent is removed, and the product is purified and dried in vacuum.

[0028] to the resulting polymer 1 H-NMR measurement confirmed its structure. The confirmation result is: on the basis that the PBS peak remains unchanged, a quartet appears at δ=5.15, and a double seal appears at δ=1.57. Corresponding to -CH in the PLA chain 3 and -CH peaks. The block copolymer of PBS and PLA was synthesized. according to 1 The molecular weight of the obtained block copolymer calculated by H-NMR is 158534.

[0029] At the same time, the obtained product was dissolved in chloroform to prepare a solution with a certain concentration, and its intrinsic viscosity at 26° C. was ...

Embodiment 2

[0031] Add 70 parts by mass of lactide and 30 parts by mass of PBS into the reaction flask, use toluene as solvent, add the catalyst stannous octoate accounting for 0.1% of the total mass of lactide and PBS, and raise the temperature to 170°C under nitrogen protection for 4.5 h. After the reaction is finished, the solvent is removed, and the product is purified and dried in vacuum.

[0032] to the resulting polymer 1 H-NMR measurement confirmed its structure. The confirmation result is: on the basis that the PBS peak remains unchanged, a quartet appears at δ=5.15, and a double seal appears at δ=1.57. Corresponding to -CH in the PLA chain 3 and -CH peaks. The block copolymer of PBS and PLA was synthesized. according to 1 The molecular weight of the obtained block copolymer calculated by H-NMR is 198449.

[0033] At the same time, the obtained product was dissolved in chloroform to prepare a solution with a certain concentration, and its intrinsic viscosity at 26° C. was ...

Embodiment 3

[0035] Add 90 parts by mass of lactide and 10 parts by mass of PBS into the reaction flask, use toluene as the solvent, add the catalyst stannous octoate accounting for 0.1% of the total mass of lactide and PBS, and heat up to 180°C under nitrogen protection for 6.5 h. After the reaction is finished, the solvent is removed, and the product is purified and dried in vacuum.

[0036] The obtained product was dissolved in chloroform to make a solution with a certain concentration, and its intrinsic viscosity at 26°C was measured with an Ubbelohde viscometer to be 0.49dL / g.

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Abstract

The invention relates to a polylactic acid toughening modifier in the technical field of high polymer material and a preparation method thereof. Lactide ring-opening polymerization is initiated on the terminal hydroxyl of poly (butylene succinate), and purification is carried out, thus obtaining the polylactic acid toughening modifier, the chemical structural formula is as follows. The modifier of the invention prepared by adopting degradable material can solve transport phenomenon and diosmose in the prior art.

Description

technical field [0001] The invention relates to a material and a method in the technical field of polymer materials, in particular to a polylactic acid toughening modifier and a preparation method thereof. Background technique [0002] With the rapid development of the national economy, the use of polymer materials has penetrated into all areas of people's lives, bringing great convenience to our lives. However, most commonly used polymer materials are difficult to biodegrade, which leads to serious environmental pollution problems, such as "white pollution". With people's high attention to environmental issues and the improvement of quality of life requirements, the development of fully biodegradable polymer materials has become a research hotspot at home and abroad. [0003] Polylactic acid (PLA) is an aliphatic polyester obtained by converting starch extracted from renewable plant resources such as corn and potatoes into glucose, which is fermented into lactic acid and f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/08C08G63/91C08L67/04
Inventor 袁角亮徐张宇杨斌王方颉
Owner SHANGHAI JIAO TONG UNIV
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