Fatigue of viscoelastic polymers: 2. Fractography

White, J. R.; Teh, Jiashen

doi:10.1016/0032-3861(79)90252-0

Cited by 34 publications

(7 citation statements)

References 26 publications

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“…24) in which the fracture is initiated from a flaw at one corner of the specimen. It shows wavy ribbon-like fracture paths which is similar to the feature seen on the fracture surface of PVC (47). It is believed that the ribbon is formed as a consequence of cracks running parallel to one another in slightly displaced planes.…”

Section: Sem Fractographssupporting

confidence: 61%

Studies on morphology, mechanical properties and failure mode of blends of plasticized poly(vinyl chloride) and thermoplastic copolyester elastomer

Thomas

Gupta

1987

J. Vinyl Addit. Technol.

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Morphology and mechanical properties of blends of plasticized poly(viny1 chloride) (PVC) and thermoplastic copolyester elastomer (Hytrel40D) have been studied with special reference to the effect of blend ratios. Morphology of the blends indicates that the Hytrel phase is dispersed as domains in the continuous PVC phase up to 75 percent of its concentration. Dynamic mechanical analysis of the blends shows marginal level of compatibility between the two phases. The mechanical properties depend on the proportion of thermoplastic rubber in the blend. Attempts have been made to correlate the blend morphology with properties. Failure surfaces were examined by scanning electron microscope and it was found that the fractographs depend on the type of failure (tensile or tear) and on the blend composition.

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Section: Sem Fractographssupporting

confidence: 61%

Studies on morphology, mechanical properties and failure mode of blends of plasticized poly(vinyl chloride) and thermoplastic copolyester elastomer

Thomas

Gupta

1987

J. Vinyl Addit. Technol.

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“…It is also worth noting that the fatigue damage in LDPE reported by White and Teh 24 , 25 occurred in a l00 28 polymer whose T is below -100°C g…”

mentioning

confidence: 91%

Mechanisms of fatigue damage and fracture in semi-crystalline polymers

Bretz

Hertzberg

Mason

1981

Polymer

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“…Polymers and particularly polyethylene microstructure and mechanical properties degrade at different rates depending on the operation environment. Studies show that polymer degradation can be induced by five processes [3]: photo-degradation by UV exposure [4], oxidation by chemical additives [5], thermal degradation by heat [6], mechanical degradation by mechanical effects [7] and biodegradation by microorganisms [8]. Depending on the environmental and operating conditions, a degradation mechanism might be preponderant relatively to the others [9].…”

Section: Context Of the Studymentioning

confidence: 99%

Effect of UV Ageing on the fatigue life of bulk polyethylene

et al. 2018

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Abstract. Polymers operating in various weathering conditions must be assessed for lifetime performance. Particularly, ultraviolet (UV) radiations alters the chemical structure and therefore affect the mechanical and fatigue properties. The UV irradiation alters the polymer chemical structure, which results into a degradation of the mechanical and fatigue behavior of the polymer. The polymer properties degradation due to UV irradiation is the result of a competitive process of chain scission versus post-crosslinking. Although few studied investigated the effect of UV irradiation on the mechanical behaviour of thermoplastics, fewer examined the UV irradiation effect on the fatigue life of polymers. This study focuses on investigating the effect of UV irradiation on the fatigue properties of bulk semi-crystalline polymer; the low density Polyethylene (LDPE). Tensile specimens were exposed to different dose values of UV irradiation then subjected to fatigue loading. The fatigue tests were achieved under constant stress amplitude at a frequency of 1Hz. The results show an important decrease of the fatigue limit with increasing absorbed UV irradiation dose.

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Fatigue of viscoelastic polymers: 2. Fractography

Cited by 34 publications

References 26 publications

Studies on morphology, mechanical properties and failure mode of blends of plasticized poly(vinyl chloride) and thermoplastic copolyester elastomer

Studies on morphology, mechanical properties and failure mode of blends of plasticized poly(vinyl chloride) and thermoplastic copolyester elastomer

Mechanisms of fatigue damage and fracture in semi-crystalline polymers

Effect of UV Ageing on the fatigue life of bulk polyethylene

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