Unlock instant, AI-driven research and patent intelligence for your innovation.

Chain extension flame-retardant polylactic acid and preparation method thereof

A technology of polylactic acid and phosphite, which is applied in the field of flame retardant materials, can solve the problem of PLA flammability limiting wide application, and achieve the effect of improving thermal stability and mechanical properties

Pending Publication Date: 2020-04-28
EAST CHINA UNIV OF SCI & TECH
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PLA's flammability and severe droplet characteristics during combustion greatly limit its wide application in electronics, electrical and automotive industries.

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
  • Chain extension flame-retardant polylactic acid and preparation method thereof
  • Chain extension flame-retardant polylactic acid and preparation method thereof
  • Chain extension flame-retardant polylactic acid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] First dry PLA and PSQ powder in a vacuum oven at 80°C for 12 hours, then add PSQ and PLA (the amount of PSQ added is 10% of the mass of PLA) to an internal mixer to prepare PLA-PSQ, the processing temperature is 180°C, and the rotation speed is 60r / min, the mixing time is 10min. Then, the PLA blend was pressed into a standard sample in a standard mold using a flat vulcanizer. The hot-pressing temperature was 180 °C, the pressure was 10 MP, and the hot-pressing time was 5 min to obtain PLA-PSQ.

Embodiment 2

[0041]First dry PLA and PPSQ powder in a vacuum oven at 80°C for 12 hours, then add PPSQ and PLA (the amount of PPSQ added is 10% of the mass of PLA) to an internal mixer to prepare PLA-PPSQ, and the processing temperature is 180°C. The rotating speed is 60r / min, and the mixing time is 10min. Then, the chain-extended PLA was pressed into a standard sample in a standard mold using a flat vulcanizer. The hot-pressing temperature was 180 ° C, the pressure was 10 MP, and the hot-pressing time was 5 minutes to obtain a PLA-PPSQ standard sample.

Embodiment 3

[0043] First dry PLA and PPSQ powder in a vacuum oven at 80°C for 12 hours, then add PPSQ and PLA (the amount of PPSQ added is 15% of the mass of PLA) to an internal mixer to prepare PLA-PPSQ, and the processing temperature is 180°C. The rotating speed is 60r / min, and the mixing time is 10min. Then, the chain-extended PLA was pressed into a standard sample in a standard mold using a flat vulcanizer. The hot-pressing temperature was 180° C., the pressure was 10 MP, and the hot-pressing time was 5 minutes.

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

PropertyMeasurementUnit
limiting oxygen indexaaaaaaaaaa
Login to View More

Abstract

The invention discloses chain extension flame-retardant polylactic acid and a preparation method thereof, and belongs to the technical field of flame-retardant materials. Raw materials of the chain extension flame-retardant polylactic acid are polyamino epoxy siloxane (PSQ) and polylactic acid (PLA) or phosphite functionalized polyamino epoxy siloxane (PPSQ) and polylactic acid (PLA). The preparation method comprises the following steps: and mixing polyamino epoxy siloxane (PSQ) or phosphite functionalized polyamino epoxy siloxane (PPSQ) with polylactic acid (PLA), then preparing the chain extension PLA through fusion and thick refining, wherein phosphorus and silicon in the PPSQ have a synergistic effect, and silicon is promoted to migrate to the surface to form more silicon oxide and silicon carbide in the combustion process, so that a carbon layer obtained after combustion of the chain-extended polylactic acid is more compact, and the flame-retardant effect is better.

Description

technical field [0001] The invention relates to the technical field of flame-retardant materials, in particular to a chain-extended flame-retardant polylactic acid and a preparation method thereof. Background technique [0002] In recent years, due to environmental pollution and shortage of petroleum resources, biodegradable polymers have received extensive attention. PLA not only has good biodegradability and processability and mechanical properties comparable to petroleum-based plastics, but also has a wide range of raw materials, so it has great potential to replace petroleum-based plastics. In recent years, with the gradual improvement of lactic acid purification technology, the price of PLA has gradually decreased, and it has gradually expanded from the field of biomedicine to food packaging, 3D printing and other fields. However, PLA's flammability and severe droplet characteristics during combustion greatly limit its wide application in electronics, electrical and au...

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): C08L67/04C08L83/10C08G63/81
CPCC08G63/912C08L67/04C08L2201/02C08L2201/08C08L2205/24C08L83/10
Inventor 孟鑫梁娟蒋泽文
Owner EAST CHINA UNIV OF SCI & TECH