Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Polylactic acid chain extender, preparation method thereof and modified polylactic acid

A polylactic acid and chain extender technology, applied in the field of modified polylactic acid, can solve the problems of slow dispersion speed, uneven dispersion, uneven molecular weight distribution, etc., and achieve cleanliness, good compatibility, and easy control of product quality Effect

Active Publication Date: 2019-04-05
INST OF NEW MATERIALS & IND TECH WENZHOU UNIV +1
View PDF3 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dispersion speed of the existing chain extenders in the polylactic acid matrix is ​​slow and uneven, resulting in uneven molecular weight distribution after chain extension

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Polylactic acid chain extender, preparation method thereof and modified polylactic acid
  • Polylactic acid chain extender, preparation method thereof and modified polylactic acid
  • Polylactic acid chain extender, preparation method thereof and modified polylactic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) The formula of the polylactic acid chain extender is (by mass parts):

[0026] Polylactic acid (2003D, NatureWorks, USA): 100;

[0027] Glycidyl methacrylate: 10;

[0028] Antioxidant 1010: 0.2;

[0029] 2) Preparation process of polylactic acid chain extender

[0030] First dry the polylactic acid in a dryer at 80°C for 10 hours, then add the polylactic acid, glycidyl methacrylate and antioxidant 1010 into the high-speed mixer according to the above mass fractions and mix evenly. Extrude and granulate. Finally, the particle is irradiated with an absorbed dose of 20kGy electron beams to prepare the polylactic acid chain extender-glycidyl methacrylate grafted polylactic acid copolymer (PLA-g-GMA) of the present invention, and its preparation reaction schematic diagram is shown in the attached figure 1 .

Embodiment 2

[0032] 1) The formula of the polylactic acid chain extender is (by mass parts):

[0033] Polylactic acid (2003D, NatureWorks, USA): 100;

[0034] Glycidyl methacrylate: 1;

[0035] Antioxidant 1010: 0.1;

[0036] 2) Preparation process of polylactic acid chain extender

[0037] First dry the polylactic acid in a dryer at 80°C for 10 hours, then add the polylactic acid, glycidyl methacrylate and antioxidant 1010 into the high-speed mixer according to the above mass fractions and mix evenly. Extrude and granulate. Finally, the particles are irradiated with electron beams with an absorbed dose of 10 kGy to prepare the polylactic acid chain extender-glycidyl methacrylate grafted polylactic acid copolymer (PLA-g-GMA) of the present invention.

Embodiment 3

[0039] 1) The formula of the polylactic acid chain extender is (by mass parts):

[0040] Polylactic acid (2003D, NatureWorks, USA): 100;

[0041] Glycidyl methacrylate: 30;

[0042] Antioxidant 1010: 0.5;

[0043] 2) Preparation process of polylactic acid chain extender

[0044] First dry the polylactic acid in a dryer at 80°C for 10 hours, then add the polylactic acid, glycidyl methacrylate and antioxidant 1010 into the high-speed mixer according to the above mass fractions and mix evenly. Extrude and granulate. Finally, the particles are irradiated with electron beams with an absorbed dose of 30 kGy to prepare the polylactic acid chain extender-glycidyl methacrylate grafted polylactic acid copolymer (PLA-g-GMA) of the present invention.

[0045] performance test

[0046] The effect of chain extender on polylactic acid was compared by torque rheometer.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a polylactic acid chain extender, a preparation method thereof and a modified polylactic acid. The structural formula of the polylactic acid chain extender is shown as follows. The polylactic acid chain extender has the technological advantages of being high in dispersion speed and uniform in dispersion in polylactic acid matrixes.

Description

technical field [0001] The invention relates to a polylactic acid chain extender, a preparation method thereof and modified polylactic acid. Background technique [0002] Polylactic acid (PLA, Polylactic acid), as the most typical bio-based polymer material, is not only derived from renewable plant resources, but also can be biodegraded into non-toxic and harmless carbon dioxide and water under natural conditions. However, polylactic acid is a linear polyester with few branched chains and entanglement points in its molecular structure, low melt strength, and poor thermal processing performance and expandability. The methods to improve the melt strength of polylactic acid mainly include physical modification such as blending, nucleation, nanocomposite and fiber composite, and chemical modification such as copolymerization, branching, chain extension and crosslinking. Among them, chain extension is an effective method to improve the melt strength of PLA. However, the dispers...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/02C08F220/32C08K5/134C08L67/04C08L51/08
CPCC08F283/02C08L67/04C08L51/08C08K5/1345
Inventor 黄承哲全承福王运萍
Owner INST OF NEW MATERIALS & IND TECH WENZHOU UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com