Modeling the Curing Kinetics of an Epoxy Binder with Disturbed Stoichiometry for a Composite Material of Aerospace Purpose

Gilev, V. G.; Rusakov, S. V.; Chudinov, V. S.; Rakhmanov, A. Yu.; Kondyurin, A.

doi:10.1007/s11029-021-09960-3

Cited by 4 publications

(3 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Thermo-oxidative degradation can be slowed down or avoided in the absence of heating sources [ 54 ]. Residual curing can be avoided if the polymer is appropriately and fully cured; it can be confirmed using experimental methods, i.e., Differential Scanning Calorimetry (DSC) [ 50 , 55 ].…”

Section: Ageing and Degradation Modelling Of Composite Microconstituentsmentioning

confidence: 99%

Modelling of Environmental Ageing of Polymers and Polymer Composites—Modular and Multiscale Methods

et al. 2022

View full text Add to dashboard Cite

Service lifetimes of polymers and polymer composites are impacted by environmental ageing. The validation of new composites and their environmental durability involves costly testing programs, thus calling for more affordable and safe alternatives, and modelling is seen as such an alternative. The state-of-the-art models are systematized in this work. The review offers a comprehensive overview of the modular and multiscale modelling approaches. These approaches provide means to predict the environmental ageing and degradation of polymers and polymer composites. Furthermore, the systematization of methods and models presented herein leads to a deeper and reliable understanding of the physical and chemical principles of environmental ageing. As a result, it provides better confidence in the modelling methods for predicting the environmental durability of polymeric materials and fibre-reinforced composites.

show abstract

Section: Ageing and Degradation Modelling Of Composite Microconstituentsmentioning

confidence: 99%

Modelling of Environmental Ageing of Polymers and Polymer Composites—Modular and Multiscale Methods

et al. 2022

View full text Add to dashboard Cite

show abstract

“…However, it could be used in more complex cases after some modifications, e.g., vertical shift functions [ 57 , 85 ], stress-dependent parameters [ 35 ], equivalent strain rate [ 52 ], etc. The vertical shift factors could result from changes in the structure, e.g., degree of crystallinity in semicrystalline polymers [ 86 ] or residual curing in thermoset resins [ 39 , 87 ]. They can also be associated with the stress-dependent effects of nonlinear viscoelasticity [ 36 ].…”

Section: Models For Predicting Materials Durability and Service Lifetimementioning

confidence: 99%

Modelling of Environmental Ageing of Polymers and Polymer Composites—Durability Prediction Methods

et al. 2022

View full text Add to dashboard Cite

Polymers and polymer composites are negatively impacted by environmental ageing, reducing their service lifetimes. The uncertainty of the material interaction with the environment compromises their superior strength and stiffness. Validation of new composite materials and structures often involves lengthy and expensive testing programs. Therefore, modelling is an affordable alternative that can partly replace extensive testing and thus reduce validation costs. Durability prediction models are often subject to conflicting requirements of versatility and minimum experimental efforts required for their validation. Based on physical observations of composite macroproperties, engineering and phenomenological models provide manageable representations of complex mechanistic models. This review offers a systematised overview of the state-of-the-art models and accelerated testing methodologies for predicting the long-term mechanical performance of polymers and polymer composites. Accelerated testing methods for predicting static, creep, and fatig ue lifetime of various polymers and polymer composites under environmental factors’ single or coupled influence are overviewed. Service lifetimes are predicted by means of degradation rate models, superposition principles, and parametrisation techniques. This review is a continuation of the authors’ work on modelling environmental ageing of polymer composites: the first part of the review covered multiscale and modular modelling methods of environmental degradation. The present work is focused on modelling engineering mechanical properties.

show abstract

“…На кривой производной по термогравиметрической кривой (ДТГ-кривой) выделено четыре пика разложения (пики при 40,1; 324,7; 377,4 и 513,0 °C). Пик с вершиной при температуре 40,1 °C характеризует удаление из образца легколетучих компонентов (соответствующая потеря массы, установленная по термогравиметрической кривой (ТГ-кривой), составляет 0,79% ─ по показателям водопоглощения исследуемые образцы биоразлагаемых полимеров в сравнение с ПЭНП характеризуются лучшей гидрофобностью (кроме образца PLA № 2); ─ для улучшения эксплуатационных свойств биополимера рекомендуется использовать специальные модифицирующие (упрочняющие и гидрофобизирующие) добавки [14][15][16][17][18][19][20].…”

Section: материалы и методыunclassified

Investigation of the properties of synthetic and biodegradable polymers, with a view to the possibility of their use in the food industry

Ershova

Мишурина

Bessonova

et al. 2022

Vestn. Voronež. gos. univ. inž. tehnol.

View full text Add to dashboard Cite

The article deals with the actual problem of environmental friendliness of packaging materials used in the food industry. The aim of the work was to study the physical and mechanical characteristics of biodegradable and synthetic polymers, with the aim of updating the replacement of synthetic packaging materials with more environmentally friendly materials. The article discusses the main characteristics of innovative biodegradable materials based on polylactides (PLA). A comparative analysis of the strength and sorption properties of both biodegradable and synthetic polymeric materials is presented. A comparative analysis of the materials under study was carried out according to the following parameters: water absorption, puncture resistance, deformation-strength and thermophysical characteristics. The paper also presents the results of a study of the water-absorbing capacity of the analyzed polymeric materials. The results of tests are presented, which make it possible to establish the temperature-time parameters of the processing of polylactide by the melt method. The data obtained by the DSC method on the establishment of relaxation and phase transitions that occur in the polymer during thermolysis are analyzed. During the experiment, experimental studies of the chemical properties of biodegradable materials based on polylactides (PLA), made in China were carried out. The main advantages and disadvantages of synthetic and natural polymeric materials are considered. In addition, the paper analyzes the environmental aspects of the practical application of the studied polymeric materials. Conclusions are formulated about the possibility and safety of using the presented materials in various branches of the food industry. Based on the results of the experiment, it was found that synthetic polymer materials slightly exceed biopolymer materials in terms of the investigated physical and mechanical parameters, however, given the environmental friendliness and the possibility of complete utilization in natural conditions, this fact does not reduce the relevance of using biopolymers in the food industry. In addition, the analysis of data on the chemical composition of the studied biopolymers based on polylactides (PLA) showed that the decrease in the strength parameters of the presented samples can be neutralized by introducing modifying strengthening and hydrophobizing additives.

show abstract

Modeling the Curing Kinetics of an Epoxy Binder with Disturbed Stoichiometry for a Composite Material of Aerospace Purpose

Cited by 4 publications

References 13 publications

Modelling of Environmental Ageing of Polymers and Polymer Composites—Modular and Multiscale Methods

Modelling of Environmental Ageing of Polymers and Polymer Composites—Modular and Multiscale Methods

Modelling of Environmental Ageing of Polymers and Polymer Composites—Durability Prediction Methods

Investigation of the properties of synthetic and biodegradable polymers, with a view to the possibility of their use in the food industry

Contact Info

Product

Resources

About