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The Importance of Compatibilizers for Wood-Plastic Composites(WPCs)

The Importance of Compatibilizers for Wood-Plastic Composites(WPCs)

  • カテゴリ:研究開発
  • 出品者:
  • 出所:
  • 出品日時:2019-09-02 10:00
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【概要の説明】Cellulose, the main component of wood powder, contains a large number of hydroxyl groups which form intermolecular or intramolecular hydrogen bonds. Those hydrogen bonds having strong polarity makes wood powder with water absorption whose rate up to 8% ~ 12%. While thermoplastics are hydrophobic because of having non-polar.

The Importance of Compatibilizers for Wood-Plastic Composites(WPCs)

【概要の説明】Cellulose, the main component of wood powder, contains a large number of hydroxyl groups which form intermolecular or intramolecular hydrogen bonds. Those hydrogen bonds having strong polarity makes wood powder with water absorption whose rate up to 8% ~ 12%. While thermoplastics are hydrophobic because of having non-polar.

  • カテゴリ:研究開発
  • 出品者:
  • 出所:
  • 出品日時:2019-09-02 10:00
  • PV:
詳細

Cellulose, the main component of wood powder, contains a large number of hydroxyl groups which form intermolecular or intramolecular hydrogen bonds. Those hydrogen bonds having strong polarity makes wood powder with water absorption whose rate up to 8% ~ 12%. While thermoplastics are hydrophobic because of having non-polar. As the result, the compatibility of  wood flour and plastics is poor and their interface adhesion force is very small. Using compatibilizers to modify the polymer-wood powder surface can improve their interfacial affinity, while the modified wood powder filler having the strengthening property can also well transfer the stress between filler and resin, so as to enhance the strength of composite material. Therefore, Adding the compatibilizer for WPC is the first problem to be solved in order to obtain good properties and reach the requirements.

 

Adding compatibilizers is more easiest and effective method. At present, suitable compatibilizers include maleic anhydride(MA) grafted polymer or MA copolymers. Most of these compatibilizers contain carboxyl or anhydride groups, which can produce chemical reactions with hydroxyl in wood powder, thereby reducing the polarity and moisture absorption after having good compatibility with resin.

 

COACE compatibilizer for WPC in details as follow.

 

No.

Grade

Base

Application

1

B1

PP-g-MAH

PP +wood

2

W1L

LDPE-g-MAH

LDPE+wood

3

W1H

HDPE-g-MAH

HDPE+wood

4

K3A

Ethylene/propylene elastomers

PP +PE+wood

(core)

5

K3B

Propylene/ethylene elastomers

PP +PE+wood

(surface)

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