Halogen-free flame retardant polystyrene nano composite material and preparation method thereof

A technology of polystyrene nano and composite materials, which is applied in the field of polymer flame retardant, can solve the problems of poor compatibility and easy agglomeration of nanosheets, and achieve high flame retardant efficiency, excellent flame retardant smoke suppression performance, additive Small amount of effect

Inactive Publication Date: 2013-09-04
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when LDH is used in flame-retardant polymers, there are still problems such as poor compatibility with polymers, and LDH nanosheets are prone to agglomeration in the polymer matrix, which is not conducive to the flame-retardant effect of LDH in polymers.

Method used

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  • Halogen-free flame retardant polystyrene nano composite material and preparation method thereof
  • Halogen-free flame retardant polystyrene nano composite material and preparation method thereof
  • Halogen-free flame retardant polystyrene nano composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A halogen-free flame-retardant polystyrene nanocomposite material, comprising the following components (in parts by mass):

[0034] General-purpose polystyrene resin (PG-383, purchased from Taiwan Chi Mei Industrial Co., Ltd.): 90 parts;

[0035]Magnesium-aluminum layered double hydroxide (see Yoshioka T, Uchda M, Okuwaki A. Hydrotalcite synthesis using calculated dolomite as a magnesium and alkali resource. Journal of Material Science Letters, 2002, 21:1747-1749. for the preparation method): 5 share;

[0036] Octakis(dibromoethyl) POSS (Octakis(dibromoethyl) POSS, HA0640) (purchased from Hybrid Plastics, USA): 0.5 parts;

[0037] SEBS (purchased from Nanjing Jintian Plastic Co., Ltd.): 2 copies;

[0038] Antioxidant 1010 (purchased from Yixing Angel Synthetic Chemical Co., Ltd.): 0.5 parts;

[0039] Zinc stearate (purchased from Shanghai Chuangzhen Chemical Co., Ltd.): 1 part;

[0040] Titanate coupling agent NXT201 (purchased from Nanjing Xuyang Chemical Co., Ltd....

Embodiment 2

[0047] Embodiment 2. A halogen-free flame-retardant polystyrene nanocomposite material, the difference from Example 1 is that the components are modified as follows: general-purpose polystyrene resin: 88 parts, zinc-aluminum layered double hydroxide: 5 parts, octaphenyl POSS (octaphenyl POSS, MS0840): 0.1 parts, EPDM: 5 parts, antioxidant 168: 0.8 parts, butyl stearate: 0.3 parts, titanate coupling agent NXT201: 0.8 parts.

[0048] The temperature setting of the twin-screw extruder in step (3) is as shown in Table 2 (unit: °C)

[0049] Table 2

[0050] a district Second District Third District Four districts five districts nose 165 185 190 185 180 180

[0051] The resulting nanocomposite has a pHRR of 625kW / m 2 , compared to pure PS (865 kW / m 2 ) decreased by 28%, and the total smoke emission was 3885.2m 2 / m 2 , than pure PS (4498.8m 2 / m 2 ) decreased by 14%, and the average CO production was 0.053 g / g, which was 0.012 g / g lower than ...

Embodiment 3

[0053] A halogen-free flame-retardant polystyrene nanocomposite material, the difference from Example 1 is that the components are modified as follows: general-purpose polystyrene resin: 77 parts, cobalt-aluminum layered double hydroxide: 15 parts, glycidyl POSS Cage mixture (glycidyl POSS cage mixture, EP0409): 1 part, EPDM: 5 parts, antioxidant 168: 1 part, butyl stearate: 0.5 part, titanate coupling agent NXT201: 0.5 part.

[0054] The resulting nanocomposite has a pHRR of 556kW / m 2 , compared to pure PS (865 kW / m 2 ) decreased by 36%, and the total smoke emission was 3652.2m 2 / m 2 , than pure PS (4498.8m 2 / m 2 ) decreased by 19%, and the average CO production was 0.049 g / g, which was 0.016 g / g lower than that of pure PS (0.065 g / g).

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Abstract

The invention relates to a preparation method of a halogen-free flame retardant polystyrene nano composite material. The halogen-free flame retardant polystyrene nano composite material is prepared by mixing the following materials in parts by weight according to the formula: 70-90 parts of polystyrene, 2-20 parts of layered double hydroxide, 0.1-5 parts of cage type sesquialter siloxane, 2-10 parts of toughening agent, 0.2-1 part of antioxidant, 0.2-1 part of lubricating agent and 0.5-1 part of titanate coupling agent NXT201. The materials are placed into a high-speed blender and are stirred and uniformly mixed, and then extrusion pelletizing is carried out by utilizing a double screw extruder. According to the preparation method, the halogen-free flame retardant polystyrene nano composite material is prepared by utilizing the characteristic that one-dimensional nano particle cage type sesquialter siloxane and two-dimensional nano layered double hydroxide are synergistic and are flame retardant to polystyrene, peak heat release rate and smoke generation rate of the halogen-free flame retardant polystyrene nano composite material can be effectively reduced by utilizing the synergistic effect of the cage type sesquialter siloxane on the layered double hydroxide, synergistic flame retardancy and smoke suppression effect of the cage type sesquialter siloxane are obviously reflected, and a flame retardant effect is good.

Description

technical field [0001] The invention relates to a halogen-free flame-retardant polymer nanocomposite material, belonging to the technical field of polymer flame-retardant. Background technique [0002] Polystyrene (PS) has become the third largest plastic in the world due to its good electrical insulation, processing flow properties, and dimensional stability. It is widely used in electrical appliances, decoration, construction, military industry, transportation and other fields. However, PS and its homologous polymer materials, like most other polymer materials, are easy to burn in the air and have a large amount of heat and smoke. They are flammable materials, which limits their application. Therefore, polystyrene can only be used after flame retardant modification. In addition, because most of the halogen-containing flame-retardant polystyrene contains some small molecular substances that are incompatible with the polypropylene matrix, its products will generate volatile...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/06C08K13/02C08K3/22C08K5/549C08K5/098
Inventor 韩永芹申明霞吴英郭义段鹏鹏袁宗阳
Owner HOHAI UNIV
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