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Hypercrosslinked polystyrene and preparation method thereof

A technology of polystyrene and hypercrosslinking, which is applied in the field of composite materials, can solve the problems of poor heat resistance and low surface hardness, and achieve the effects of good heat resistance, increased crosslink density, and improved heat resistance

Pending Publication Date: 2022-04-15
湖南丰立复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polystyrene has obvious performance defects, its heat resistance is poor, its Tg is 80-105°C, its continuous use temperature is about 60°C, and the maximum should not exceed 80°C; in addition, its long-term exposure to heat, oxygen, impurities and atmospheric conditions It is prone to aging phenomenon, and its surface hardness is low, so its application is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The hypercrosslinked polystyrene described in this embodiment includes styrene, polystyrene, crosslinking agent, initiator and auxiliary agent, wherein the mass ratio of styrene and polystyrene is 10:2; The content of the additive accounts for 3% of the sum of the mass of styrene and polystyrene; the content of the auxiliary agent accounts for 0.5% of the sum of the mass of styrene and polystyrene; 0.2% of the sum of the masses. The initiator consists of azobisisoheptanonitrile, azobisisobutyronitrile, tert-butyl peroxybenzoate and tert-butyl peroxy-2-ethylhexanoate in a mass ratio of 1:1:1:1 Than composition. The crosslinking agent is composed of divinylbenzene and N,N-methylenebisacrylamide in a mass ratio of 1:1. The auxiliary agent is butadiene oligomer.

[0023] The preparation method of hypercrosslinked polystyrene described in the present embodiment comprises the steps:

[0024] 1) Fully dissolve the styrene, polystyrene, cross-linking agent and auxiliary age...

Embodiment 2

[0028] The hypercrosslinked polystyrene described in this embodiment includes styrene, polystyrene, crosslinking agent, initiator and auxiliary agent, wherein the mass ratio of styrene and polystyrene is 10:2; The content of the additive accounts for 3% of the sum of the mass of styrene and polystyrene; the content of the auxiliary agent accounts for 0.5% of the sum of the mass of styrene and polystyrene; 0.2% of the sum of the masses. The initiator consists of azobisisoheptanonitrile, azobisisobutyronitrile, tert-butyl peroxybenzoate and tert-butyl peroxy-2-ethylhexanoate in a mass ratio of 1:1:1:1 Than composition. The crosslinking agent is composed of divinylbenzene and N,N-methylenebisacrylamide in a mass ratio of 1:1. The auxiliary agent is composed of butadiene oligomer and α-methylstyrene oligomer in a mass ratio of 1:1.

[0029] The preparation conditions are the same as in Example 1.

[0030] The product appearance that present embodiment obtains is transparent so...

Embodiment 3

[0032]The hypercrosslinked polystyrene described in the present embodiment comprises styrene, polystyrene, crosslinking agent, auxiliary agent and initiator, wherein the mass ratio of styrene and polystyrene is 10:2; The content of the additive accounts for 5% of the sum of the mass of styrene and polystyrene; the content of the auxiliary agent accounts for 0.5% of the sum of the mass of styrene and polystyrene; 0.2% of the sum of the masses. The initiator consists of azobisisoheptanonitrile, azobisisobutyronitrile, tert-butyl peroxybenzoate and tert-butyl peroxy-2-ethylhexanoate in a mass ratio of 1:1:1:1 Than composition. The crosslinking agent is composed of divinylbenzene and N,N-methylenebisacrylamide in a mass ratio of 1:1. The auxiliary agent is composed of butadiene oligomer and α-methylstyrene oligomer in a mass ratio of 1:1.

[0033] The preparation conditions are the same as in Example 1.

[0034] The product appearance that present embodiment obtains is transpa...

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PUM

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Abstract

The super-crosslinked polystyrene comprises styrene, polystyrene, a cross-linking agent, an initiator and an auxiliary agent, and the mass ratio of the styrene to the polystyrene is 10: (0-5); the content of the cross-linking agent accounts for 0.05-10% of the sum of the mass of the styrene and the mass of the polystyrene; the content of the initiator accounts for 0.001-3% of the sum of the mass of the styrene and the mass of the polystyrene; the content of the auxiliary agent accounts for 0-10% of the sum of the mass of the styrene and the mass of the polystyrene. The prepared super-crosslinked polystyrene product is excellent in comprehensive performance and can be applied to radar antennas, military communication satellite antenna windows, missile radomes, guidance system room sonar converters, high-frequency coaxial connectors, high-frequency circuit board substrates, single-mode optical fiber plugs, high-power pulse vacuum insulators and the like.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a hypercrosslinked polystyrene and a preparation method thereof. Background technique [0002] Polystyrene is a product obtained by addition polymerization of styrene monomer, which is a non-polar polymer. The conventional synthesis methods of polystyrene include bulk polymerization and suspension polymerization. Polystyrene has excellent electrical and optical properties, and its volume resistivity and surface resistivity are high, respectively 10 16 ~10 18 Ω·cm and 10 15 ~10 18 Ω·cm; the dielectric loss tangent of polystyrene is extremely low, and it is not affected by frequency and ambient temperature; the light transmittance is greater than 88% to 92%, and it has excellent optical properties and transparency. However, polystyrene has obvious performance defects, its heat resistance is poor, its Tg is 80-105°C, its continuous use temperature is about 60°C, and...

Claims

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Application Information

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IPC IPC(8): C08F257/02C08F212/08C08F212/36C08F222/38
Inventor 杨勇
Owner 湖南丰立复合材料有限公司
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