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Toughening agent with chain extension function and application of toughening agent in engineering plastic processing

A toughening agent and functional technology, applied in the field of toughening agent, can solve problems such as poor mechanical properties and difficult processing of recycled PET

Active Publication Date: 2014-05-28
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the above-mentioned prior art, the present invention provides a toughening agent with chain extension function, which can effectively increase the chain extension and viscosity of recycled PET while improving the impact strength of recycled PET, and successfully solve the processing difficulties of recycled PET and poor mechanical properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Under a nitrogen atmosphere, 0.6 parts of glycidyl methacrylate, 70 parts of methyl methacrylate, 30 parts of n-butyl acrylate and 0.6 parts of initiator dibenzoyl peroxide were mixed and dissolved in 50 parts of toluene organic solvent, Add dropwise to an organic solution containing 0.6 parts of chain transfer agent n-dodecyl mercaptan and 50 parts of toluene, the dropping time is 2 hours, the temperature is 60°C, and the rotational speed is 3000 rdm. After the dropwise addition is completed, adjust the temperature to 70°C, continue the reaction for 2 hours, and adjust the rotation speed to 5000 rdm. The obtained product is washed, filtered and dried in sequence. It is a chain-extending toughener with an epoxy value of 4.2×10 -3 mol / 100g.

[0020] Mix 100 parts of rPET (intrinsic viscosity 0.60dl / g), 50 parts of the above-mentioned chain-extended toughener (epoxy value 4.2×10 -3 mol / 100g), 0.1 part of antioxidant 1024, 0.2 part of antioxidant 168, blended for 5 minute...

Embodiment 2

[0022] Under a nitrogen atmosphere, mix and dissolve 1.0 parts of glycidyl acrylate, 80 parts of styrene, 20 parts of n-butyl acrylate and 0.3 parts of initiator azobisisobutyronitrile in 50 parts of toluene organic solvent, and add 0.5 parts of 1 part of chain transfer agent n-dodecyl mercaptan, 50 parts of toluene in an organic solution, the dropping time is 2.5 hours, the temperature is 70 ° C, and the rotation speed is 3000 rdm. After the dropwise addition, continue to react for 2.5 hours, adjust the temperature to 80°C, and adjust the rotation speed to 5000 rdm. The obtained product is washed, filtered and dried in sequence. It is a chain-extending toughener with an epoxy value of 7.04×10 -3 mol / 100g.

[0023] Mix 100 parts of rPET (intrinsic viscosity 0.60dl / g), 40 parts of the above-mentioned chain-extended toughener (epoxy value 7.04×10 -3 mol / 100g), 0.2 parts of antioxidant 1024, 0.2 parts of antioxidant 168, blended for 5 minutes, and then added to the twin-screw ex...

Embodiment 3

[0025] Under nitrogen atmosphere, mix and dissolve 1.5 parts of glycidyl acrylate, 60 parts of styrene, 40 parts of ethyl acrylate and 0.3 parts of initiator azobisisobutyronitrile in 50 parts of toluene organic solvent, and add 0.5 parts of The chain transfer agent n-butanethiol is added to an organic solution of 50 parts of toluene, the dropping time is 2 hours, the temperature is 70°C, and the rotation speed is 3000 rdm. After the dropwise addition is completed, continue to react for 2 hours, adjust the temperature to 80°C, and adjust the rotation speed to 5000 rdm. The obtained product is washed, filtered and dried in sequence. It is a chain-extending toughener with an epoxy value of 1.05×10 -2 mol / 100g.

[0026] Mix 100 parts of rPET (intrinsic viscosity 0.60dl / g), 15 parts of the above-mentioned chain-extended toughener (epoxy value 1.05×10 -2 mol / 100g), 0.4 parts of antioxidant 1024, 0.4 parts of antioxidant 168, blended for 5 minutes, and then added to the twin-screw ...

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PUM

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Abstract

The invention discloses a toughening agent with a chain extension function. Under a nitrogen environment, a total monomer and an initiator are jointly and dropwise added into a chain transfer agent contained organic solvent with the temperature of 50 DEG C-70 DEG C, and the dropwise adding time is 2-3 hours; after dropwise adding is ended, the reaction continues for 2-6 hours, and a product is sequentially washed, filtered and dried; and the toughening agent is prepared through a polymerization reaction of a solvent, and the epoxy value is about 4*10<-3> mol / 100g to 5*10 <-2> mol / 100g. A preparation process of the toughening agent is simple, the reaction conditions are mild, the activity is moderate, and a good chain extension function is realized; and a final product has good toughness and excellent tensile property. The toughening agent can be used for recovering and processing hydroxyl-terminated and carboxyl-terminated polycondensate such as PET (polyethylene terephthalate), PBT (polybutylene terephthalate) and the like, and chain extension and toughening of a PET recovery material are realized; and at the same time, the production technology process is simplified, and the operation is easy.

Description

technical field [0001] The invention relates to a toughening agent with chain extending function and the application of the toughening agent with chain extending function in recycling and processing of hydroxyl-terminated and carboxyl-terminated condensation polymers of engineering plastics such as PET and PBT. Background technique [0002] Polymethyl terephthalate (PET), polybutylene terephthalate (PBT) and other hydroxyl-terminated carboxyl-terminated condensation polymers are important engineering plastics. Their common feature is that they generally have good mechanical strength, weather resistance and chemical resistance, and are widely used in film materials, outer packaging materials, bottles, castings and other fields. However, this also causes white pollution. In order to protect the environment and save resources, the recycling technology of engineering plastics has received strong attention in the industry, and outstanding progress has been made in this regard. ...

Claims

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Application Information

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IPC IPC(8): C08F220/14C08F212/08C08F218/08C08F220/18C08F220/32C08F2/38C08L33/12C08L25/14C08L31/04C08L67/02B29B9/06
Inventor 徐卫兵曹渊周正发马海红任凤梅
Owner HEFEI UNIV OF TECH
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