THE INFLUENCE OF HEATING TECHNOLOGY ON THE DURATION OF THE CURING PROCESS OF POLYMER COMPOSITE MATERIALS

The article considers the problem of the effect of uneven curing caused by the temperature gradient across the thickness of the material on the anisotropy of the strength properties of polymer composite materials. The effect of catalysts on the curing of the epoxy binder EDT-69N, used for the manufacture of multilayer polymer composite materials, was studied. According to dielectric spectrometry, the accelerating effect of the selected compounds on the curing process of the EDT-69N epoxy binder during fiberglass molding has been proved. The possibility of controlling the curing process using catalysts to reduce the influence of the temperature gradient on the anisotropy of the strength properties of the matrix in the manufacture of polymer composite materials is shown.

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OPTIMIZATION OF CURING PROCESS FOR HIGH TEMPERATURE RESISTANT BINDER FOR POLYMER COMPOSITE MATERIALS

PNRPU Bulletin Chemical Technology and Biotechnology ◽

10.15593/2224-9400/2017.3.08 ◽

2017 ◽

pp. 91-103

Author(s):

Dmitriy Kiselkov ◽

◽

Aleksei Slobodinyuk ◽

Tamara Oschepkova

Keyword(s):

High Temperature ◽

Composite Materials ◽

Polymer Composite ◽

Polymer Composite Materials ◽

Curing Process

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Energy-saving technology of production of elements of building structures from polymer materials

Physical Metallurgy and Heat Treatment of Metals ◽

10.30838/j.pmhtm.2413.230321.41.733 ◽

2021 ◽

pp. 41-48

Author(s):

A.V. Kondratiev ◽

О.О. Prontsevych

Keyword(s):

Composite Materials ◽

Energy Saving ◽

Polymer Composite ◽

Technological Process ◽

Polymer Materials ◽

Polymer Composite Materials ◽

Gas Evolution ◽

Curing Process ◽

Structural Elements ◽

Energy Saving Technology

Problem statement. At present, the increase in the efficiency of the technology for the production of composite structural elements is associated with high energy costs. In this regard, the implementation of ways to optimize the parameters of the technological process of manufacturing polymer composite materials is of great importance. The purpose of the article is to optimize the modes of impregnation and curing of thermosetting binders and polymer composite materials based on them in combination with the kinetics of gas evolution and control of all stages of the technological process. Results. An energy-saving technology for molding composite structural elements of buildings and structures has been developed, which provides a reduction in the duration of the curing process of polymer materials, depending on the type of binder. The technology makes it possible to control the speed and degree of curing of a thermosetting binder by changing the tangent of the dielectric loss angle and electrical conductivity. Scientific novelty and practical significance. The approach and the electrophysical method for optimizing the modes of impregnation and curing of composite products in combination with the control of all stages of the technological process have been further developed in relation to the elements of composite structures. The permissible values of the curing parameters have been established according to the optimized mode of a number of thermosetting binders: heating rates, isotherm temperatures, and holding time at them. At the same time, the achieved optimal curing times for binders BFOS, LBS-4, ENFB, 5-211B using the new technology is 2.4; 1.8; 3.0; 2.3; 2.0 and 1.2 times less than according to known technologies. The results obtained guarantee the quality of the resulting composite product and are recommended for accelerating the curing process of polymer materials. Keywords: optimization; technological regime; impregnation; curing; thermosetting binders; gas evolution; stage control

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PROSPECTS OF THE PRODUCTION OF LARGE-SIZED AIRCRAFT PARTS FROM POLYMER COMPOSITE MATERIALS (review)

Proceedings of VIAM ◽

10.18577/2307-6046-2021-0-12-55-62 ◽

2021 ◽

pp. 55-62

Author(s):

V.A. Goncharov ◽

◽

P.N. Timoshkov ◽

M.N. Usacheva ◽

◽

...

Keyword(s):

Composite Materials ◽

Polymer Composite ◽

Polymer Composite Materials ◽

Vacuum Impregnation ◽

Curing Process ◽

Process Automation ◽

Materials Development ◽

Infusion Method ◽

Technological Methods ◽

Selection Of

Today wings for Boeing 787 and Airbus A350 aircraft are made of polymer composite materials in the form of prepregs based on carbon fiber, the blanks of which are molded in an autoclave. It is expected that by 2025–2030 will actively use the vacuum infusion method, which will require global research on the selection of binding and reinforcing materials, development of the vacuum impregnation and curing process, automation and development of new technological methods for laying out workpieces of parts, accelerating the process and shortening the cycle time.

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Polymeric Composites for Filling Bone Cavities

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.869.419 ◽

2020 ◽

Vol 869 ◽

pp. 419-423

Author(s):

Dina I. Fazylova ◽

Lubov A. Zenitova

Keyword(s):

Molecular Weight ◽

Composite Materials ◽

Polymer Composite ◽

Maxillofacial Surgery ◽

Polymeric Composites ◽

Polymer Composite Materials ◽

Low Molecular Weight ◽

Curing Process ◽

The Creation

Polymer composite materials (PCМ) based on low molecular weight siloxane rubber SKTN-A have been developed, which are supposed to be used as osteoplastic materials in maxillofacial surgery. The following materials were used as fillers for the creation of PCM: bentonite, sepiolite, wollastanite. The effect of the type and content of filler on the curing process and the properties of the resulting compositions was investigated.

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Research of Formal-Kinetic Regularities of the Curing Process of Low-Viscosity Epoxy Binder

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.b7662.129219 ◽

2019 ◽

Vol 9 (2) ◽

pp. 1168-1173

Keyword(s):

Composite Materials ◽

Polymer Composite ◽

Polymer Composite Materials ◽

Practical Significance ◽

Epoxy Binder ◽

Curing Process ◽

Model Free ◽

Low Viscosity ◽

Formal Kinetic ◽

Degree Of Curing

The expanding range of components intended for manufacturing products of polymer composite materials is often not accompanied by comprehensive information on the characteristics and recommended technological curing modes. The relevance and practical significance of this investigation are based on the need to predict rational technological modes for curing products of polymer composite materials based on the low-viscosity epoxy binder Etal-Inject-SLM, which is in demand in the manufacture of products from polymer composite materials by cold curing. The purpose of this investigation is to determine kinetic patterns, which allow for predicting the time and degree of curing of the low-viscosity epoxy binder Etal-Inject-SLM for various isothermal curing conditions. The method of differential scanning calorimetry was used to measure the thermal effect of the curing reaction of the Etal-Inject-SLM epoxy binder at various heating rates. Based on the experimental calorimetric data and using the model-free (non-prior) Friedman method, using the specialized software Netzsch Kinetics Neo, the parameters characterizing the formal kinetic laws of the curing process were calculated. This allowed for plotting isothermal and iso-conversion thermokinetic diagrams necessary for predicting the time and degree of curing of the Etal-Inject-SLM binder at different temperatures and curing times. This results can be useful for optimizing technological processes in which the low-viscosity epoxy binder Etal-Inject-SLM is used.

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