Biodegradable polystyrene composition and preparation method thereof

A technology of biodegradation and polystyrene, applied in the field of biodegradable polystyrene composition and its preparation, can solve the problems of incomplete degradation of waste polystyrene, carbon deposition in heat transfer, etc.

Active Publication Date: 2013-06-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of heterogeneous catalytic thermal cracking reaction, there are many problems to be solved, such as heat transfer, carbon deposition, catalyst regeneration and recycling; while in photocatalytic cracking, there is the problem of incomplete degradation of waste polystyrene.

Method used

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  • Biodegradable polystyrene composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] With 72g butylene terephthalate-co-butylene adipate copolyester (PBTA) (weight average molecular weight is 1.1 * 10 5 , aliphatic content is 75 mol%, biodegradation rate is 60% (composting in 87 days), purchased from BASF company) joins in 200g ethylbenzene, heats in boiling water bath, stirs 2 hours and makes PBTA dissolve completely.

[0046]The air in the kettle was completely replaced with nitrogen; 1700g of styrene monomer (produced by Yanshan Petrochemical) and 100g of ethylbenzene were added to the kettle, and 1.8g of anti-aging agent 1076 was added. The initiation method adopts thermal initiation. The polymerization kettle is heated at a stirring rate of 138rpm / min, and the agitator is a ribbon compound agitator in the upper part of the bottom triangular plate; when the reaction temperature reaches 100°C, under the protection of nitrogen, the ethyl group of the completely dissolved PBTA Add the benzene solution into the reaction kettle and continue to heat up. ...

Embodiment 2

[0056] Add 60 g of PBTA into 200 g of ethylbenzene, heat in a boiling water bath, and stir for 2 hours to completely dissolve the PBTA.

[0057] The air in the kettle was completely replaced with nitrogen; 1700g of styrene monomer (produced by Yanshan Petrochemical) and 500g of ethylbenzene were added to the kettle, and 1.8g of anti-aging agent 2246 was added. The reaction was initiated by adding 2 g of cumene hydroperoxide. The polymerization kettle is heated up at a stirring rate of 125rpm / min, and the agitator is a ribbon compound agitator in the upper part of the bottom triangular plate; Add the benzene solution into the reaction kettle and continue to heat up. Polymerization was carried out at 105°C for 5 hours, at 135°C for 2.5 hours, and at 140°C for 2 hours. After the polymerization is completed, the viscous body obtained from the polymerization is discharged, placed in a devolatilizer at 195°C, and flashed rapidly under vacuum to remove unreacted styrene monomer and...

Embodiment 3

[0059] 85g of hexanediol terephthalate-co-hexanediol adipate copolyester (PHTA, purchased from BASF, with a weight average molecular weight of 1.2×10 5 , the aliphatic content is 85 mole %), add in 200g ethylbenzene, heat in boiling water bath, stir 3 hours and make PHTA dissolve completely.

[0060] The air in the kettle was completely replaced with nitrogen; 1700 g of styrene monomer (produced by Yanshan Petrochemical) and 300 g of ethylbenzene were added into the kettle. The initiation method adopts thermal initiation. The polymerization kettle is heated at a stirring rate of 130rpm / min, and the agitator is a ribbon compound agitator in the upper part of the bottom triangular plate; when the reaction temperature reaches 100°C, under the protection of nitrogen, the ethyl group of the completely dissolved PHTA Add the benzene solution into the reaction kettle and continue to heat up. Polymerization was carried out at 130°C for 3 hours, at 140°C for 1.5 hours, and at 170°C f...

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Abstract

The invention provides a biodegradable polystyrene composition, which is characterized by containing polystyrene and a polymer of styrene and aliphatic-aromatic copolyester. The weight average molecular weight of the composition is 0.8*10<5> to 4.0*10<5>, the biodegradation rate of the composition is 10-30 weight percent according to ASTM D5338-92, the aliphatic-aromatic copolyester is biodegradable aliphatic-aromatic copolyester, and the content of the aliphatic-aromatic copolyester in the polymer of the styrene and the aliphatic-aromatic copolyester is 1-15 weight percent based on the totalweight of the composition. The invention also provides a preparation method of the biodegradable polystyrene composition. While maintaining the mechanical properties of polystyrene, the polystyrene composition also has excellent biodegradable properties.

Description

technical field [0001] The invention relates to a biodegradable polystyrene composition and a preparation method thereof. Background technique [0002] Polystyrene (PS) is widely used in various industrial and civil fields because of its hard quality, good transparency, rigidity, electrical insulation, low hygroscopicity, low price, easy dyeing, easy processing, and thermal conductivity that does not change with temperature. With a wide range of applications, it has become one of the four general-purpose plastics today. As the consumption of polystyrene resin continues to increase, more and more polystyrene waste products are generated. Due to the stable structure of polystyrene, it is difficult to degrade under natural conditions, forming "white pollution" that poses a serious threat to the ecological environment. How to deal with "white garbage" has become the focus of attention in recent years. [0003] At present, there are many ways to deal with waste polystyrene, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L25/06C08L51/08C08F283/02
Inventor 王洪涛张晓尘史新波斯维
Owner CHINA PETROLEUM & CHEM CORP
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