Effect of prolonged atmospheric aging on the properties and structure of carbon plastic

Старцев, О. В.; Vapirov, Yu. M.; Deev, I. S.; Yartsev, V. A.; Krivonos, V. V.; Митрофанова, Елена; Chubarova, M. A.

doi:10.1007/bf00692255

Cited by 6 publications

(3 citation statements)

References 2 publications

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“…A similar tendency towards the stabilization of mechanical parameters is observed studying the long-term climatic aging of PCM in [76][77][78] (Fig. 2).…”

Section: Relaxation Of Internal Stresses During Thermocycling Of Pcmssupporting

confidence: 80%

The Influence of Internal Stresses on the Aging of Polymer Composite Materials: a Review

Каблов

Startsev

2021

Mech Compos Mater

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The formation of internal stresses in polymer composite materials (PCMs) caused by different elastic moduli and thermal expansion coefficients of polymer resin and reinforcing fibers, as well as by swelling due to the moisture uptake is discussed. The influence of thermal cycles on the internal stresses and strength of the materials was studied in dry and wet atmospheres. It shown that thermal cycles cause a periodic jumps in the stresses at lowfrequency mechanical loadings, during which the mechanical properties are degraded due to the formation of microscopic cracks in the polymer matrix. The relative changes in the strength, elastic modulus, glass-transition temperatures, moisture diffusion coefficient, and other PCM physical characteristics are proportional to the logarithm of the number of cycles and also depend on the form and size of specimens, amplitude, conditions, and length of thermal cycles. A prolonged action of external actions relaxes the internal stresses and reduces their influence on the aging of PCMs.

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“…A similar tendency towards the stabilization of mechanical parameters is observed studying the long-term climatic aging of PCM in [76][77][78] (Fig. 2).…”

Section: Relaxation Of Internal Stresses During Thermocycling Of Pcmssupporting

confidence: 80%

The Influence of Internal Stresses on the Aging of Polymer Composite Materials: a Review

Каблов

Startsev

2021

Mech Compos Mater

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“…Much as other polymer composite materials, the properties of the glass-cloth-base laminate in question are determined by the superposition of two processes: post-curing and the destruction of the binder [2,3]. At the initial stage of ageing, the dominant role is played by the post-curing process, the indicators of which are: rise in temperature of a-transition, characteristic temperatures T I -T, and values of G' in the highly elastic state (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…characteristic temperatures T I -T4 determined by the breaks of the curve on the chart c,(T).Temperatures T I and T3 are the beginning and the end of the atransition in the disordered matrix of the EDT-1OP binder, and T2 and T4 show the boundaries of the same transition in the ordered phase[2].…”

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confidence: 99%

Effect of Climatic and Radiation Ageing on Properties of Glass Fiber Reinforced Plastic VPS-7

Старцев

Krotov

Golub

1998

International Journal of Polymeric Materials and Polymeric Biom

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The effect of radiation on the properties of glass fiber reinforced plastic of VPS-7 type on the basis of EDT-I0 epoxy binder was investigated. Radiation treatment with the maximum dose of 30 MGy was performed for glass fiber reinforced plastic samples in the initial state and after 0.5, 1,2, and 5 years of exposure in the zones of cold, moderate and warm damp climate. Evaluation of climatic and radiation resistance was conducted by the change in bending strength, interlayer shear strength, Young modulus. Methods of dynamic mechanical analysis and linear dilatometry were employed to investigate the state of epoxy binder during ageing. It has been established that radiation treatment of both initial and climatically aged VPS-7 samples, causes the destruction of the boundary (epoxy binder -glass fiber). The discovered extreme increase of mechanical characteristics of glass fiber reinforced plastic is explained by the competing effects of these two processes. In this case, there is a lack of indications to the occurrence of additional joinings of epoxy binder molecules during irradiation. It has been proved that ageing conducted according to the reverse scheme (radiation treatment with subsequent exposure in the climate) is more rigid and intensifies the effects of the change in the properties of the glass fiber reinforced plastic.

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Effect of static loads and of factors of cold climate on the deformability, strength, and life of polyester wound glass-reinforced plastic

Герасимов¹,

Bulmanis²

1989

Mech Compos Mater

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Effect of prolonged atmospheric aging on the properties and structure of carbon plastic

Cited by 6 publications

References 2 publications

The Influence of Internal Stresses on the Aging of Polymer Composite Materials: a Review

The Influence of Internal Stresses on the Aging of Polymer Composite Materials: a Review

Effect of Climatic and Radiation Ageing on Properties of Glass Fiber Reinforced Plastic VPS-7

Effect of static loads and of factors of cold climate on the deformability, strength, and life of polyester wound glass-reinforced plastic

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