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A kind of aromatic polyester microporous foam material and preparation method thereof

A technology of microcellular foaming material and aromatic polyester, which is applied in the field of aromatic polyester foaming material and its preparation, and can solve problems such as difficulty in maintaining cell structure, merging, and difficulty in shaping foamed products

Active Publication Date: 2016-08-24
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the prior art, in order to overcome the disadvantages of low viscosity of aromatic polyester melt, it is difficult to maintain the cell structure, and it is easy to cause cell collapse and merging, the viscosity of PET is increased by adding a cross-linking agent, but this technology is easy to cause cross-linking structure, and the residue of crosslinking agent is unfavorable to the recycling of products
On the other hand, the crystallization rate of aromatic polyester is slow, the foamed products are difficult to shape, and it is difficult to obtain microcellular PET foamed products

Method used

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  • A kind of aromatic polyester microporous foam material and preparation method thereof
  • A kind of aromatic polyester microporous foam material and preparation method thereof
  • A kind of aromatic polyester microporous foam material and preparation method thereof

Examples

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preparation example Construction

[0034] According to one embodiment of the preparation method of the aromatic polyester microcellular foaming material of the present invention, it adopts a physical extrusion foaming method, comprising: (1) 100 parts by weight of aromatic polyester, sorbitol benzylidene derivative 0.5-5 parts by weight, 0.1-0.3 parts by weight of antioxidant, 0-2 parts by weight of chain extender, 0-2 parts by weight of cell nucleating agent, mixed in proportion and added to the extruder, heated and screw sheared It is melted under the action of cutting and plasticizing; (2) The physical foaming agent is metered and pumped into the polymer melt in the extruder through the gas injection port installed on the extruder barrel, and the addition of the physical foaming agent The amount is 0.1-10% of the total weight of the aromatic polyester composition, uniformly mixed in the extruder; (3) reduce the temperature between the injection port of the blowing agent and the outlet of the machine head, and...

Embodiment 1

[0046] Raw material: polyethylene terephthalate (PET), intrinsic viscosity 0.80dl / g (according to GB / T14190-2008) test, solvent is phenol / 1,1,2,2,-tetrachloroethane (mass ratio 50 / 50), Sinopec Yizheng Chemical Fiber Co., Ltd.; ,4-dimethylbenzylidene) sorbitol, referred to as DMDBS, thermal decomposition temperature 320 ℃, model ZC-3, Yantai Zhichu Synthetic Chemical Co., Ltd. The thermal decomposition temperature is measured by a thermogravimetric analyzer. The heating rate is 10°C / min. On the thermogravimetric curve, the maximum weight loss rate is the thermal decomposition temperature.

[0047] Antioxidant Irganox1010, Germany BASF company.

[0048] Talc powder, 1000 mesh, Beijing Liguoweiye Powder Material Co., Ltd.

[0049] Carbon dioxide, purity 99.5%, Beijing Oxygen Plant.

[0050] Foaming process: Pre-dry polyethylene terephthalate (PET), DMDBS, antioxidant, talcum powder, etc. The drying process is: PET, 100 ° C, vacuum drying for 12 hours, then 140 ° C, vacuum dryi...

Embodiment 2-3

[0055] Using the same foaming process as in Example 1, the difference is that the content of each component in the raw material is different, and the melt temperature in the foaming process is different. In Example 3-4, the chain extender pyromellitic dianhydride (PMDA), analytically pure, produced by Sinopharm Chemical Reagent Company, was added.

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Abstract

The invention discloses an aromatic polyester foaming microcellular foaming material which is prepared from an aromatic polyester composition through a foaming process. The aromatic polyester composition comprises the following components in parts by weight: 100 parts of aromatic polyester, 0.5-5 parts of a sorbitol benzylidene derivative, 0.1-0.3 part of an antioxidant, 0-2 parts of a chain extender and 0-2 parts of a bubble nucleator; the apparent density of the aromatic polyester foaming microcellular foaming material is 0.05-1.10g / cm<3> and the percentage of close area is not less than 80%. The invention also discloses multiple preparation methods of the aromatic polyester foaming microcellular foaming material. The aromatic polyester foaming microcellular foaming material has the characteristics of wide foaming temperature region, easy process control and small and uniform bubble size; products have excellent heat resistance and mechanical properties.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to an aromatic polyester foam material and a preparation method thereof. Background technique [0002] Foamed plastic is a composite material filled with a large number of air bubbles based on plastic, so it has excellent properties such as light weight, material saving, high specific strength, low thermal conductivity, excellent heat and sound insulation, and ability to absorb impact loads, so it is widely used. Used as packaging, heat insulation, anti-freezing and heat preservation, cushioning and anti-vibration, sound-absorbing materials, it has been widely used in construction, transportation, daily necessities, packaging, aerospace, navigation, national defense and other fields. Traditional ones such as polyurethane foam (PU), polyethylene foam (PE) and polystyrene foam (PS), etc., have certain deficiencies in the material itself and processing methods, such as poly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08K5/1575C08K3/34C08J9/12C08J9/10C08J9/14
Inventor 信春玲何亚东杨兆平郭亚峰闫宝瑞
Owner BEIJING UNIV OF CHEM TECH