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Crystallization in miscible and immiscible polymer blends

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dc.title Crystallization in miscible and immiscible polymer blends en
dc.contributor.author Svoboda (FT), Petr
dc.relation.ispartof Polypropylene: Synthesis, Applications and Environmental Concerrns
dc.identifier.isbn 978-1-62417-142-0
dc.date.issued 2013
dc.citation.spage 37
dc.citation.epage 70
dc.event.location New York, NY
utb.event.state-en United States
utb.event.state-cs Spojené státy americké
dc.type bookPart
dc.language.iso en
dc.publisher Nova Science Publishers
dc.subject immiscible en
dc.subject miscible en
dc.subject crystallization en
dc.subject polypropylene en
dc.subject polymer blends en
dc.description.abstract Crystalline morphology influences greatly mechanical properties. Firstly the influence of crystallization temperature on elastic behavior of miscible polypropylene (PP)/hydrogenated polybutadiene (hBR) blends is discussed in terms of residual strain values after pre-defined stretching. The structure was directly observed in nano-scale by transmission electron microscopy (TEM) and quantitatively evaluated by differential scanning calorimetry (DSC). PP/hBR blends serve as a model for explanation of the elastic behaviour of polyolefinic TPE containing PP. There is a big difference in structure and properties for neat PP and PP/hBR blend. Regardless on crystallization temperature, PP shows always yielding point, i.e. plastic deformation after stretching even to small deformation. In neat PP, the crosshatch lamellar crystals were always formed. The situation for PP/hBR blend was completely different. The elastic properties are highly affected by crystallization temperature. The optimum in temperature of cooling medium was found to be around room temperature. In this case the formation of long crosshatch lamellae was prevented and the small fragmented crystal lamellae were formed. The fragmented crystallites play a role of tie points for amorphous chains to render good elastomeric behaviour. There is no yielding point in stress-strain curves for those blends. en
utb.faculty University Institute
dc.identifier.uri http://hdl.handle.net/10563/1005887
utb.identifier.rivid RIV/70883521:28610/13:43871029!RIV14-MSM-28610___
utb.identifier.obdid 43871382
utb.identifier.scopus 2-s2.0-84892095437
utb.source c-riv
dc.date.accessioned 2016-04-28T10:37:18Z
dc.date.available 2016-04-28T10:37:18Z
dc.description.sponsorship P(ED2.1.00/03.0111)
dc.format.extent 373
utb.ou Centre of Polymer Systems
utb.identifier.utb-sysno 72543
utb.identifier.nkp 006357932
utb.contributor.internalauthor Svoboda (FT), Petr
riv.obor CD
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