FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2034187641> ?p ?o ?g. }

• W2034187641 endingPage "6855" @default.
• W2034187641 startingPage "6843" @default.
• W2034187641 abstract "A comparative analysis of the structure and mechanical properties of two elastomeric amorphous and semicrystalline polypropylenes samples, produced with C2v-symmetric and chiral C2-symmetric ansa-zirconocene catalysts, respectively, is presented. The poorly isotactic polypropylene (iam-PP) of medium molecular weight, prepared with the chiral C2-symmetric catalyst, slowly crystallizes, by aging at room temperature or by stretching, in a continuum of disordered modifications intermediate between α and γ forms of isotactic polypropylene. Structural and morphological transformations occur during stretching. Disordered α/γ modifications, containing a high fraction of perpendicular chains, present in the unoriented film, transform by stretching at high deformations into structures more similar to the α form with a high content of parallel chains. The development of the small level of crystallinity induces elastic properties. The small crystalline domains in the amorphous matrix, indeed, act as physical knots of the elastomeric lattice. This poorly isotactic iam-PP sample shows, instead, poor elastic properties and viscous flow at high deformations in the amorphous state, before crystallization, because of the not high molecular weight. The unique crystallization mode of the iam-PP sample explains the remarkable enhancement of elastic properties in low stereoregular polypropylene upon development of crystallinity. The fully amorphous high molecular weight atactic polypropylene (a-PP), prepared with the C2v-symmetric catalyst, presents elastic behavior only in a small deformation range (up to 300% strain) and experiences viscous flow of the chains at high deformations. The elasticity arises from the physical network generated by the high degree of entanglement of the polymeric chains generated by the high molecular weight of the sample. The poorly isotactic iam-PP sample, before crystallization, presents much poorer elastic properties than the a-PP sample because of the lower molecular weight. After crystallization, it shows better elastic properties in a large range of deformation with higher strength, notwithstanding the lower molecular weight, due to the presence of crystallinity." @default.
• W2034187641 created "2016-06-24" @default.
• W2034187641 creator A5001189346 @default.
• W2034187641 creator A5018216287 @default.
• W2034187641 creator A5072471271 @default.
• W2034187641 date "2004-08-12" @default.
• W2034187641 modified "2023-09-23" @default.
• W2034187641 title "Structure and Properties of Elastomeric Polypropylene from <i>C</i>₂ and <i>C</i>₂<i>_v</i>-Symmetric Zirconocenes. The Origin of Crystallinity and Elastic Properties in Poorly Isotactic Polypropylene" @default.
• W2034187641 cites W1847906400 @default.
• W2034187641 cites W1966926504 @default.
• W2034187641 cites W1974163821 @default.
• W2034187641 cites W1978192878 @default.
• W2034187641 cites W1984893831 @default.
• W2034187641 cites W1994595152 @default.
• W2034187641 cites W2003163685 @default.
• W2034187641 cites W2007771134 @default.
• W2034187641 cites W2008689776 @default.
• W2034187641 cites W2016857556 @default.
• W2034187641 cites W2025647044 @default.
• W2034187641 cites W2026048067 @default.
• W2034187641 cites W2027696416 @default.
• W2034187641 cites W2033085204 @default.
• W2034187641 cites W2036152656 @default.
• W2034187641 cites W2041192699 @default.
• W2034187641 cites W2042761821 @default.
• W2034187641 cites W2045209948 @default.
• W2034187641 cites W2047708261 @default.
• W2034187641 cites W2059899012 @default.
• W2034187641 cites W2064325329 @default.
• W2034187641 cites W2066180670 @default.
• W2034187641 cites W2088252607 @default.
• W2034187641 cites W2092080730 @default.
• W2034187641 cites W2094513048 @default.
• W2034187641 cites W2094783956 @default.
• W2034187641 cites W2153900045 @default.
• W2034187641 cites W2331820380 @default.
• W2034187641 doi "https://doi.org/10.1021/ma0493372" @default.
• W2034187641 hasPublicationYear "2004" @default.
• W2034187641 type Work @default.
• W2034187641 sameAs 2034187641 @default.
• W2034187641 citedByCount "62" @default.
• W2034187641 countsByYear W20341876412012 @default.
• W2034187641 countsByYear W20341876412013 @default.
• W2034187641 countsByYear W20341876412014 @default.
• W2034187641 countsByYear W20341876412015 @default.
• W2034187641 countsByYear W20341876412016 @default.
• W2034187641 countsByYear W20341876412017 @default.
• W2034187641 countsByYear W20341876412018 @default.
• W2034187641 countsByYear W20341876412019 @default.
• W2034187641 countsByYear W20341876412020 @default.
• W2034187641 countsByYear W20341876412021 @default.
• W2034187641 countsByYear W20341876412022 @default.
• W2034187641 countsByYear W20341876412023 @default.
• W2034187641 crossrefType "journal-article" @default.
• W2034187641 hasAuthorship W2034187641A5001189346 @default.
• W2034187641 hasAuthorship W2034187641A5018216287 @default.
• W2034187641 hasAuthorship W2034187641A5072471271 @default.
• W2034187641 hasConcept C127413603 @default.
• W2034187641 hasConcept C159985019 @default.
• W2034187641 hasConcept C185592680 @default.
• W2034187641 hasConcept C188027245 @default.
• W2034187641 hasConcept C192562407 @default.
• W2034187641 hasConcept C203036418 @default.
• W2034187641 hasConcept C2777973245 @default.
• W2034187641 hasConcept C38052585 @default.
• W2034187641 hasConcept C42360764 @default.
• W2034187641 hasConcept C44228677 @default.
• W2034187641 hasConcept C46275449 @default.
• W2034187641 hasConcept C521977710 @default.
• W2034187641 hasConcept C56052488 @default.
• W2034187641 hasConcept C58018886 @default.
• W2034187641 hasConcept C8010536 @default.
• W2034187641 hasConceptScore W2034187641C127413603 @default.
• W2034187641 hasConceptScore W2034187641C159985019 @default.
• W2034187641 hasConceptScore W2034187641C185592680 @default.
• W2034187641 hasConceptScore W2034187641C188027245 @default.
• W2034187641 hasConceptScore W2034187641C192562407 @default.
• W2034187641 hasConceptScore W2034187641C203036418 @default.
• W2034187641 hasConceptScore W2034187641C2777973245 @default.
• W2034187641 hasConceptScore W2034187641C38052585 @default.
• W2034187641 hasConceptScore W2034187641C42360764 @default.
• W2034187641 hasConceptScore W2034187641C44228677 @default.
• W2034187641 hasConceptScore W2034187641C46275449 @default.
• W2034187641 hasConceptScore W2034187641C521977710 @default.
• W2034187641 hasConceptScore W2034187641C56052488 @default.
• W2034187641 hasConceptScore W2034187641C58018886 @default.
• W2034187641 hasConceptScore W2034187641C8010536 @default.
• W2034187641 hasIssue "18" @default.
• W2034187641 hasLocation W20341876411 @default.
• W2034187641 hasOpenAccess W2034187641 @default.
• W2034187641 hasPrimaryLocation W20341876411 @default.
• W2034187641 hasRelatedWork W2000704145 @default.
• W2034187641 hasRelatedWork W2047034352 @default.
• W2034187641 hasRelatedWork W2047906440 @default.
• W2034187641 hasRelatedWork W2054998425 @default.
• W2034187641 hasRelatedWork W2091772422 @default.
• W2034187641 hasRelatedWork W2385660950 @default.
• W2034187641 hasRelatedWork W2548493560 @default.

• next