Fully-degradable poly propylene carbonate/wood meal composite foaming material and preparation method thereof

A polymethylethylene carbonate and composite foaming technology, which is applied in the field of fully degradable polymethylethylene carbonate/wood powder composite foaming materials and its preparation, can solve the mechanical properties of toughness, impact strength and bending strength Reduce problems such as limitations in the application field of wood-plastic composite materials, and achieve the effects of high toughness, high impact strength, and good woody feeling

Active Publication Date: 2015-01-21
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Wood-plastic composites have the above advantages, but compared with unfilled plastics, their mechanical properties such as toughness, impact strength and bending strength will be reduced, and the density is several times that of pure natural wood. These shortcomings make wood-plastic composites The field of application is limited

Method used

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  • Fully-degradable poly propylene carbonate/wood meal composite foaming material and preparation method thereof
  • Fully-degradable poly propylene carbonate/wood meal composite foaming material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1~4

[0053] The fully degraded polymethylethylene carbonate / wood powder composite foam material of embodiment 1~4 is prepared by the formula listed in table 1. Its preparation process is:

[0054] (1) Add polymethylethylene carbonate and wood flour to a high-speed mixer with a rotation speed of 800 rpm and a temperature of 115°C for hot mixing. After mixing for 8 minutes, add plasticizers, coupling agents, and lubricants agent and heat stabilizer, mixed for another 6 minutes, transferred the mixed material to a cold mixer and cold mixed to 40°C, added a foaming agent, a foam stabilizer and a nucleating agent, and mixed evenly to obtain a mixed material;

[0055] (2) Put the mixed material into an embedded planetary screw extruder at 150°C and extrude, then foam through a foaming mold, cool and shape.

[0056] Table 1

[0057] Example 1 2 3 4 PPC (parts by weight) 80 60 40 30 Wood flour (parts by weight) 20 40 60 70 DBP (parts by weight) 10 10...

Embodiment 5~8

[0061] The formula listed in Table 2 and the process of Table 3 were used to prepare the fully degradable polymethylethylene carbonate / wood flour composite foaming material of Examples 5-8.

[0062] Table 2

[0063] PPC (parts by weight) 60 Wood flour (parts by weight) 40 DBP (parts by weight) 10 Titanate (parts by weight) 2 Zinc stearate (parts by weight) 3 AC (parts by weight) 10 Methyl silicone oil (parts by weight) 5 Calcium carbonate (parts by weight) 1 Talc powder (parts by weight) 2

[0064] table 3

[0065] Example 5 6 7 8 High speed mixer speed 500 700 800 1000 High speed mixer temperature 110 115 115 110 extruder temperature 110 120 130 150 Cell morphology □ □ ○ ○ Density / (g·cm -3 ) 1.10 0.96 0.85 0.82 Elongation at break / % 2.8 2.9 3.3 3.4 Bending strength / MPa 29.5 32.0 36.5 36.9 Impact strength / (kJ m -2 ) 4.0 4.3 4.8 4...

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Abstract

The invention discloses a fully-degradable poly propylene carbonate / wood meal composite foaming material which comprises the following components in parts by weight: 80-30 parts of poly propylene carbonate and 20-70 parts of wood meal; and relative to each 100 parts of raw materials comprising the poly propylene carbonate and the wood meal, additives in parts by weight, 2-40 parts of plasticizer, 0.5-10 parts of coupling agent, 0.5-10 parts of heat stabilizing agent, 0.5-5 parts of lubricating agent, 1-20 parts of foaming agent, 0-10 parts of foam homogenizing agent and 0.5-10 parts of nucleating agent are added. A preparation method comprises the following steps of: adding the poly propylene carbonate and the wood meal into a high-speed mixing machine for thermally mixing, then adding the plasticizer, the coupling agent, the lubricating agent and the heat stabilizing agent, cold-mixing in a cold mixing machine to reach the temperature of 40 DEG C, adding the foaming agent, the foam homogenizing agent and the nucleating agent, and uniformly mixing the materials to obtain a mixture; and adding the mixture into an embedded planet screw extruder for extruding, foaming through a foaming mould, and cooling and sizing.

Description

technical field [0001] The invention belongs to the field of degradable wood-plastic composite foaming materials, and in particular relates to a fully degradable polymethylethylene carbonate / wood powder composite foaming material and a preparation method thereof. Background technique [0002] Wood-plastic composite material is a composite material prepared by adding various additives with plastic and wood powder as the matrix. Wood-plastic composites have a series of special properties superior to wood and plastics: they have a wooden appearance and secondary processing properties similar to wood, but their dimensional stability is better than that of wood, and they have less water absorption, are not afraid of insects, and will not be like wood. It produces cracks and warping deformation, and has the processability of thermoplastics, but its hardness is higher than that of plastics, and it is wear-resistant, aging-resistant, and corrosion-resistant. It began to rise in th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L69/00C08L97/02C08K13/02C08K5/12C08J9/08C08J9/10
Inventor 关丽涛杨崇岭赵孟瑜涂登云云虹周宁昌
Owner SOUTH CHINA AGRI UNIV
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