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Epoxy functionalized chain extender, and preparation method and application thereof

A technology of epoxy functional and chain extender, applied in the preparation field of epoxy functional chain extender and epoxy functional chain extender, can solve the problem of low glass transition temperature Tg, easy blockage of feeding port and uneven formulation and other problems, to achieve the effect of narrow molecular weight distribution, high glass transition temperature and simple manufacturing process

Active Publication Date: 2013-02-20
SHANXI CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, because the glass transition temperature Tg of the epoxy-functionalized styrene acrylic chain extender is relatively low, it is easy to block the feed inlet, resulting in uneven formulation and unstable production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1), the formula of epoxy functionalized chain extender is:

[0031] components

parts by mass

Styrenic monomer

50

Glyceryl Acrylate Monomer

25

Initiator

2

[0032] 2), the preparation process of epoxy functionalized chain extender

[0033] Add 500ml of toluene, 350g of styrene, 175g of glycidyl acrylate, and 14g of benzoyl peroxide into a 5000ML three-neck flask, raise the temperature to 110°C, keep it for 5h, recover the solvent, and discharge to obtain the product.

[0034] 3) The measured glass transition temperature Tg of the product is 73°C

[0035] The test is based on GB / T 19466.2-2004 Plastic Differential Scanning Calorimetry (DSC) Part 2: Determination of Glass Transition Temperature.

Embodiment 2

[0037] 1.) The formula of epoxy functionalized chain extender is:

[0038] components

parts by mass

Styrenic monomer

75

Glyceryl Acrylate Monomer

50

Initiator

12

[0039] 2), the preparation process of epoxy functionalized chain extender

[0040] Add 500ml of toluene, 375g of styrene, 250g of glycidyl acrylate, and 60g of benzoyl peroxide into a 5000ML three-neck flask, raise the temperature to 110°C, keep it for 2.5h, recover the solvent, and discharge to obtain the product.

[0041] 3), the measured glass transition temperature Tg of the product is 76°C.

[0042] The test is based on GB / T 19466.2-2004 Plastic Differential Scanning Calorimetry (DSC) Part 2: Determination of Glass Transition Temperature.

Embodiment 3

[0044] And use twin-screw extruder to carry out modification granulation to polylactic acid (PLA) according to conventional process method, concrete formula is as follows:

[0045] 1) Comparative example: 0.25% chain extender ADR4370 and 99.75% polylactic acid (PLA) 4032D.

[0046] Among them, the German BASF chain extender ADR4370 can be purchased from the market.

[0047] 2) Experimental example: 0.25% of the epoxy-functionalized chain extender in Example 1 and 99.75% of polylactic acid (PLA) 4032D.

[0048] The results of the experiment show that aggregates are generated after more than ten minutes of feeding in the comparative example, the melt pressure changes greatly, and the discharge from the machine head is unstable; the feed in the experimental example is rapid and stable, the melt pressure is always constant, and the discharge from the machine head is unstable. Stablize.

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Abstract

The invention discloses an epoxy functionalized chain extender for bio-base and biodegradation-base polymers, and a preparation method and application thereof. The chain extender is prepared from the following raw materials in parts by mass: 50-75 parts of styrene monomer, 25-50 parts of acrylic acid glyceride monomer and 2-12 parts of initiator. The preparation method of the epoxy functionalized chain extender, which comprises the following steps: selecting the reaction monomers and initiator, adding the reaction monomers and initiator into a reaction kettle in a preset sequence, copolymerizing at proper temperature and mixing speed, removing the solvent from the reaction product, and granulating to obtain the product. The epoxy functionalized chain extender can be used for extending and crosslinking bio-base and biodegradable plastic molecular chains of which polylactic acid (PLA) and polypropylene carbonate (PPC) have fatty group polyester structure. The epoxy functionalized chain extender has the characteristics of narrow molecular weight distribution, high glass transition temperature, simple preparation process, and shorter reaction time since all the raw materials are mixed to react at the solvent reflux temperature.

Description

technical field [0001] The invention relates to a bio-based and biodegradable-based polymer, in particular to an epoxy functionalized chain extender, a preparation method of the epoxy functionalized chain extender and an application thereof. Background technique [0002] Green and low-carbon economy is the theme of development in the world today, and the trend of bio-based and biodegradable plastics replacing fossil-based (petroleum and coal, etc.) plastics is irreversible. The development of bio-based and biodegradable plastics with aliphatic polyester structures such as polylactic acid (PLA) and polypropylene carbonate (PPC) has attracted more and more attention worldwide. On the one hand, the industrialization technology of synthetic resins is becoming mature and industrialization The scale has increased rapidly; on the other hand, the development of processing and modification technologies has been active, and the application fields of products have continued to expand. ...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F220/32C08L67/04C08L69/00C08L25/14
Inventor 王克智毛晨曦李训刚李向阳王四海王改敬任淑英张建军代燕琴王凯王冉刘凤玉
Owner SHANXI CHEM RES INST
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