000 03826nam a22004575i 4500
001 978-3-7091-0514-6
003 DE-He213
005 20140220083818.0
007 cr nn 008mamaa
008 110701s2011 au | s |||| 0|eng d
020 _a9783709105146
_9978-3-7091-0514-6
024 7 _a10.1007/978-3-7091-0514-6
_2doi
050 4 _aQD380-388
072 7 _aPNNP
_2bicssc
072 7 _aTEC055000
_2bisacsh
082 0 4 _a541.2254
_223
100 1 _aPrisacariu, Cristina.
_eauthor.
245 1 0 _aPolyurethane Elastomers
_h[electronic resource] :
_bFrom Morphology to Mechanical Aspects /
_cby Cristina Prisacariu.
264 1 _aVienna :
_bSpringer Vienna,
_c2011.
300 _aXXIV, 255p. 136 illus., 18 illus. in color.
_bonline resource.
336 _atext
_btxt
_2rdacontent
337 _acomputer
_bc
_2rdamedia
338 _aonline resource
_bcr
_2rdacarrier
347 _atext file
_bPDF
_2rda
505 0 _aIntroduction. - 1 Chemistry of PUs -- 2 Hydrogen bonding in polyurethanes -- 3 PUs morphology and thermal behaviour -- 4 PUs Mechanical Properties -- 5 Sensitivity of elasticity to PUs chemical and physical structure -- 6 PUs strain induced orientation and crystallization -- Conclusions -- Perspectives.
520 _a   A comprehensive account of the physical / mechanical behaviour of polyurethanes (PU´s) elastomers, films and blends of variable crystallinity. Aspects covered include the elasticity and inelasticity of amorphous to crystalline PUs, in relation to their sensitivity to chemical and physical structure. A study is  made of how aspects of the constitutive responses of PUs vary with composition: the polyaddition procedure, the hard segment, soft segment and chain extender (diols and diamines) are varied systematically in a large number of systems of model and novel crosslinked andthermoplastic PUs. Results will be related to: microstructural changes, on the basis of evidence from x-ray scattering (SAXS and WAXS), and also dynamic mechanical analyses (DMA), differential scanning calorimetry (DSC) and IR dichroism. Inelastic effects will be investigated also by including quantitative correlations between the magnitude of the Mullins effect and the fractional energy dissipation by hysteresis under cyclic straining, giving common relations approached by all the materials studied. A major structural feature explored is the relationship between the nature of the hard segment (crystallising or not) and that of the soft segments. Crystallinity has been sometimes observed in the commercial PUs hard phase but this is usually limited to only a few percent for most hard segment structures when solidified from the melt. One particular diisocyanate, 4,4’-dibenzyl diisocyanate (DBDI) that, in the presence of suitable chain extenders ( diols or diamines), gives rise to significant degrees of crystallinity [i-iii] and this is included in the present work. Understanding the reaction pathways involved, in resolving the subtle morphological evolution at the nanometre level, and capturing mathematically the complex, large-deformation nonlinear viscoelastic mechanical behaviour are assumed to bring new important insights in the world basic research in polyurethanes and towards applied industrial research in this area.
650 0 _aChemistry.
650 0 _aPolymers.
650 0 _aCrystallography.
650 0 _aSurfaces (Physics).
650 1 4 _aChemistry.
650 2 4 _aPolymer Sciences.
650 2 4 _aCrystallography.
650 2 4 _aCharacterization and Evaluation of Materials.
710 2 _aSpringerLink (Online service)
773 0 _tSpringer eBooks
776 0 8 _iPrinted edition:
_z9783709105139
856 4 0 _uhttp://dx.doi.org/10.1007/978-3-7091-0514-6
912 _aZDB-2-CMS
999 _c108677
_d108677