Features and properties of solvent-free PMR-type polyimide resin

Zharinov M.A., Shimkin A.A., Akhmadieva K.R., Zelenina I.V.
UDC
678.072
DOI
10.18577/2307-6046-2018-0-12-46-53
Article PDF (Russian) (741.04 KB)
How to cite
Zharinov M.A., Shimkin A.A., Akhmadieva K.R., Zelenina I.V. Features and properties of solvent-free PMR-type polyimide resin // Proceedings of VIAM. 2018. No. 12. DOI: 10.18577/2307-6046-2018-0-12-46-53. URL: https://test.viam.ru/en/journal/2018/12/5
Keywords
polymer resins, polyimides, PMR-type polyimide resins, high-temperature carbon reinforced plastics, solvent-free binders, polymer matrix, thermal analysis, physical mechanical properties.
Abstract

Today among most widely used polymer resins for high-temperature composites are polyimide resins. Despite the significant successes achieved over recent decades in the field of optimization of polymerization type polyimide resin compositions, the problems of improving the processability, as well as increasing the working temperature and strength values remain urgent pressing.

The objects of the research are solvent-free polymerization type polyimide resin VS-51 (TU 1-595-12-1682-2017) developed in FSUE “VIAM” and carbon reinforced plastic. Selected monomers and synthetic conditions allowed us to achieve near solvent-free imide-forming mixture of components. The use of ethyl alcohol as a component makes it possible to significantly reduce the toxicity of polyimide resin VS-51. It should also be noted that due to the increased concentration of the  resin, the shelf life at -10 °C increases to at least 6 months.

Properties of the cured resin samples are investigated by thermal analysis. The glass transition temperature is 363 °C, the onset temperature of intensive thermal-oxidative degradation is 514 °C, and the mass loss at 500 °C is 3.0%. The heat resistance of cured resin is at the level of foreign and domestic analogues. Samples of carbon reinforced plastic based on the VTkU-2.200 carbon fabric were manufactured and investigated. Samples of carbon reinforced plastic are characterized by the following values of physical parameters: density 1.575-1.592 g/cm3; binder content 36-39%, porosity 0.4-0.6%.

The heat resistance of the obtained samples of carbon reinforced plastic was evaluated using DMA method. The glass transition temperature was 377 ° C, the temperature of the peak of the tangent of the angle of mechanical loss – 409 ° C.

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