The crystalline structure and uniaxial deformation of spherulites in thin films of a linear polyurethane

Kuz'mina, V. A.; Pasechnik, Yu.V.; Gul'ko, L.P.; Lipatov, Yu.S.; Listrovaya, L.N.

doi:10.1016/0032-3950(70)90447-8

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Studies Of Properties1

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1972

1975

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Cited by 4 publications

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“…In comparison with the ABA type block polymer which has been studied in depth (52), a typical thermoplastic polyurethane is considered to be a segmented or block polymer of (AB)Z type where A is the hard block and B is the soft block. In the absence of solvents, the hard segments usually form glassy domains (19,81,91,121,135,155) which are dispersed in the continuous phase largely made up of soft segments. The hard domains act like chemical cross-linking sites.…”

Section: Studies Of Propertiesmentioning

confidence: 99%

Advances in Polyurethane Coatings (1969 to Early 1972)

Chang¹,

Scriven²,

Peffer³

et al. 1973

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Section: Studies Of Propertiesmentioning

confidence: 99%

Advances in Polyurethane Coatings (1969 to Early 1972)

Chang¹,

Scriven²,

Peffer³

et al. 1973

Product R&D

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Microfibers within fibers: A review

Tucker

George

1972

Polymer Engineering & Sci

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Literature relating to the fundamental nature of the fibrous state is reviewed with the goal of illustrating evidence for the existence of a possibly fundamental morphological unit, the elemental microfiber or fibril. Following a short summary of the rather well documented situation in natural fibers, the problem of the microfiber in synthetic fibers is probed in terms of phenomena in solution and bulk polymeric systems. The reviewed literature indicates the existence of unique, elemental microfibers in synthetic fibers is largely tenuous; however, there is wide evidence of the existence of complex elongated structures axially aligned within macrofibers which future work may resolve into a central microfiber. The structural complexity appears to simplify for transformations occurring in high shear fields. This review covers articles through 1971, and it is notable that in 1971 approximately 100 articles of high relevance appeared in major journals.

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