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About: Crystallization of polymers     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:WikicatPolymers, within Data Space : dbpedia.org associated with source document(s)

Type: yago:WikicatSeparationProcessesyago:Abstraction100002137yago:Act100030358yago:Activity100407535yago:Chemical114806838yago:Compound114818238yago:Event100029378yago:Material114580897yago:Matter100020827yago:Part113809207yago:PhysicalEntity100001930yago:Polymer114994328yago:Procedure101023820yago:PsychologicalFeature100023100yago:Relation100031921yago:YagoPermanentlyLocatedEntityElectionyago:Substance100019613yago:WikicatPolymers New Facet based on Instances of this Class

Crystallization of polymers is a process associated with partial alignment of their molecular chains. These chains fold together and form ordered regions called lamellae, which compose larger spheroidal structures named spherulites. Polymers can crystallize upon cooling from melting, mechanical stretching or solvent evaporation. Crystallization affects optical, mechanical, thermal and chemical properties of the polymer. The degree of crystallinity is estimated by different analytical methods and it typically ranges between 10 and 80%, with crystallized polymers often called "semi-crystalline". The properties of semi-crystalline polymers are determined not only by the degree of crystallinity, but also by the size and orientation of the molecular chains.