Study of structural and deformation properties of irradiated polyethylene

Abramova, I.M.; Kazaryan, L.G.; Vatagina, V.A.; Tikhomirov, V.S.; Serenkov, V.I.

doi:10.1016/0032-3950(80)90407-4

Cited by 5 publications

(6 citation statements)

References 1 publication

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“…The a/b ratio tends towards x/3, which is the value characterizing the hexagonal lattice. The width of the reflections increases overall [100,162,170,[173][174][175] so that the higher orders disappear completely above 1000 Mrad. Yet the low order reflections 1 1 0 and 2 00 do not broaden as much as might be expected from the large changes in interplanar spacings.…”

Section: Polyethylenementioning

confidence: 99%

Radiation effects in polyethylene and n-alkanes

Ungar

1981

J Mater Sci

139

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The effect of high-energy radiation on n-alkanes and polyethylene (PE) are reviewed. The article includes a description of (a) primary radiation events, formation, spatial distribution and decay of free radicals and radical migration mechanisms, (b) formation of cross-lin ks and other sta ble products, (c) the effects of crystal linity, crystalline modifications and morphology on radiation cross-linking, and (d) radiation-induced changes in the crystal lattice and the destruction of crystallinity at high irradiation doses.An attempt is made to bring together conflicting views on various unsolved problems of the radiation physics and chemistry of these important and much studied substances. Long-chain paraffins are given considerable attention since their radiation behaviour often provides a link between that of PE and its short-chain analogues.

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Section: Polyethylenementioning

confidence: 99%

Radiation effects in polyethylene and n-alkanes

Ungar

1981

J Mater Sci

139

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“…In the literature, the crosslinks are mainly formed in the amorphous phase where chain segments have high mobility. [ 40, 46–48 ]…”

Section: Resultsmentioning

confidence: 99%

“…In the literature, the crosslinks are mainly formed in the amorphous phase where chain segments have high mobility. [40,[46][47][48] The thermal properties of irradiated 𝛼−TPI samples were characterized by DSC. The first heating curves of 𝛼−TPI are shown in Figure 3(a).…”

Section: In Situ Waxd and Saxsmentioning

confidence: 99%

“…According to the literature, crosslinks mainly occur in the amorphous region. [40,[46][47][48] With a high dose, crosslinks can also form in the crystallites. [40] Because the chains in the crystalline phase are fixed, the lifetime of radicals is very long.…”

Section: In Situ Waxd and Saxsmentioning

confidence: 99%

“…The crosslinks are formed by the coupling among the allyl radicals formed by hydrogen extraction and chain secession. [32] Serenkov et al [40] have systematically investigated the effect of radiation crosslinking of PE on structural evolution during the uniaxial stretching process. At the radiation dose of 10-250 kGy, crosslink formation only takes place in the amorphous region, and the relative elongation dropped gradually.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Crosslinking on the Stretch‐Induced Polymorphic Transition of Trans‐1,4‐Polyisoprene

Yang,

Zhang,

Zhao

et al. 2023

Macro Chemistry & Physics

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Trans‐1,4‐polyisoprene (TPI) is a typical polymorphic polymer with two crystal modifications. The transition between two crystal modifications (α to β) occurs during stretching. The underlying mechanism is still under debate. In this work, the effects of crosslinking and strain rates on the crystal transition are studied. The TPI, which mainly contains α crystal (α−TPI), is crosslinked by γ‐ray radiation. The results show that crystalline morphology does not change after radiation. The melting temperature and yield stress of crosslinked α−TPI decrease with the irradiation dose. The structural evolution is studied by in situ wide‐angle X‐ray diffraction and small‐angle X‐ray scattering. During stretching, the content of β crystal (Xβ) of crosslinked α−TPI increases in the strain‐hardening region. The Xβ is lower in the sample with a higher radiation dose under the same strain. On the other hand, with increasing strain rate, the Xβ of the crosslinked sample exhibits a non‐monotonic variation. A parallel mechanical model consisting of amorphous and crystal fibrils is proposed to explain the experimental observations.

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Thermal behavior of superficially oxidized polyethylene

Deyme

1986

Journal of Colloid and Interface Science

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Study of structural and deformation properties of irradiated polyethylene

Cited by 5 publications

References 1 publication

Radiation effects in polyethylene and n-alkanes

Radiation effects in polyethylene and n-alkanes

Effect of Crosslinking on the Stretch‐Induced Polymorphic Transition of Trans‐1,4‐Polyisoprene

Thermal behavior of superficially oxidized polyethylene

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