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Cyanate ester, bis-oxazoline or polyethylene glycol resin composite

A technology of resin composition and bisoxazoline, applied in the field of cyanate ester/bisoxazoline/polyethylene glycol resin composition, can solve problems such as insufficient toughness, achieve small loss of heat resistance and improve mechanical properties. Effect

Inactive Publication Date: 2012-09-19
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a thermosetting material, it suffers from insufficient toughness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh 40g bisphenol A cyanate (BADCy), 10g 2,2'-(1,3-phenylene)-bisoxazoline in a beaker, heat to 80°C to melt evenly, then add 5g Polyethylene glycol 6000 (PEG-6000, with an average molecular weight of 6000), after stirring evenly, degassed in a vacuum oven at 80°C for 15 minutes, poured it into a mold coated with a silicone ester release agent, and placed it in an electronic oven Carry out curing treatment. The curing process can be carried out at 150°C / 1h + 180°C / 1h + 200°C / 2h, and the post-curing condition is 240°C / 3h to obtain a dark brown-red solid resin. Glass transition temperature 276.5°C (DMA method), bending strength 154.7MPa, impact strength 15.6KJ / m 2 .

Embodiment 2

[0023] Weigh 50g bisphenol L-type cyanate (BEDCy), 5g 2,2'-(1,3-phenylene)-bisoxazoline, 5g polyethylene glycol 8000 (PEG-8000, the average molecular weight is 8000 ), all the other are the same as in Example 1.

[0024] The glass transition temperature of the cured resin is 261.6°C (DMA method), the bending strength is 147.4MPa, and the impact strength is 16.2KJ / m 2 .

Embodiment 3

[0026] Take by weighing 40g phenolic cyanate (PT), 5 g 2,2'-(1,3-phenylene)-bisoxazoline, 8g polyethylene glycol ten thousand (PEG-10000, average molecular weight is 10000 ), all the other are the same as in Example 1.

[0027] The glass transition temperature of the cured resin is 313.4°C (DMA method), the bending strength is 114.3MPa, and the impact strength is 11.5KJ / m 2 .

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Abstract

The invention relates to a cyanate ester, bis-oxazoline or polyethylene glycol resin composite. Materials of the resin composite include cyanate ester monomers, bis-oxazoline compounds and polyethylene glycol. Cyanate ester, bis-oxazoline or polyethylene glycol modified resin can be subjected to co-curing reaction during the heat curing, and a linear polyether structure is introduced into a curing network, so that the mechanical property of resin materials can be improved under the situation of small loss of thermal endurance properties of the cured resin.

Description

technical field [0001] The invention relates to a novel cyanate ester chemically modified resin, in particular to a cyanate ester / bisoxazoline / polyethylene glycol resin composition. Background technique [0002] Cyanate ester is a kind of thermosetting resin with excellent dielectric properties, mechanical properties, heat resistance and low water absorption. It has many interesting properties and has been deeply researched and developed since the 1990s. The characteristics of cyanate ester, such as its dielectric properties are far superior to epoxy and bismaleimide; mechanical properties, heat resistance are between epoxy and bismaleimide, and at high temperatures It has better stability, moisture and heat stability is better than epoxy and bismaleimide; water absorption is better than epoxy and bismaleimide, etc. At the same time, cyanate can be flexibly adapted to a variety of molding processes, such as molding, autoclave, filament winding, hand lay-up, RTM, etc. It ca...

Claims

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Application Information

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IPC IPC(8): C08G73/10C08L79/08
Inventor 李文峰
Owner TONGJI UNIV
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