Matches in SemOpenAlex for { <https://semopenalex.org/work/W2001367742> ?p ?o ?g. }
Showing items 1 to 73 of
73
with 100 items per page.
- W2001367742 endingPage "449" @default.
- W2001367742 startingPage "439" @default.
- W2001367742 abstract "Metallocene-based homogeneous Ziegler–Natta catalysts produce mono-olefin-terminated oligopropenes with narrow molecular weight distributions, controlled stereoregularities, and molecular weights ranging from 100 to 30,000 g/mole in high yield slurry and solution processes. Steric and molecular weight control are influenced by metallocene structures, and by polymerization conditions such as temperature and propene concentration. Predominantly mono-vinylidene-terminated oligopropenes are attractive intermediates, and feedstock for the synthesis of a variety of polypropylene materials, including blends, block and graft copolymers. The key step is the chain end functionalization of the vinylideneterminated oligopropenes via double bond conversion reactions, followed by the controlled synthesis of polypropylene block and graft copolymers. In melt and solution processes the olefinic end groups have been converted into a variety of polar functional groups, e.g. hydroxy, carboxy, succinic anhydride, thiol and acrylic groups. The thiol-terminated oligopropenes are chain transfer agents in radical methylmethacrylate polymerization with chain transfer constant measured to be 0.2. Acrylic monomers and styrene are grown onto the thiol end group via a chain transfer reaction, thus producing a family of block copolymers, e.g. poly(propene-b-methylmethacrylate) and poly(propene-b-styrene). As demonstrated by SEM fracture surface analysis, the poly(propene-b-styrene) block copolymers are efficient dispersing agents for compatibilizing polystyrene/polypropene (70/30) blends. Homo- and copolymerization of acrylic oligopropene macromonomers yield novel classes of graft copolymers with pendant isotactic or atactic oligopropene chains. Hydroxy-terminated oligopropenes are useful initiators in caprolactone polymerization to form poly(propene-b-caprolactone) block copolymers. IR spectroscopic studies demonstrate that succinic anhydride-terminated oligopropenes, obtained by ene-type addition of maleic anhydride to the olefinic oligopropene end group, react with oligomeric diamine-terminated polyamide-6,6 in the melt to yield polypropene-b-polyamide-6,6-b-polypropene triblock copolymers." @default.
- W2001367742 created "2016-06-24" @default.
- W2001367742 creator A5008375074 @default.
- W2001367742 creator A5049088993 @default.
- W2001367742 creator A5074411433 @default.
- W2001367742 creator A5077927370 @default.
- W2001367742 date "1993-08-01" @default.
- W2001367742 modified "2023-10-14" @default.
- W2001367742 title "Novel polypropene materials derived from vinylidene-terminated oligopropenes" @default.
- W2001367742 doi "https://doi.org/10.1002/pat.1993.220040707" @default.
- W2001367742 hasPublicationYear "1993" @default.
- W2001367742 type Work @default.
- W2001367742 sameAs 2001367742 @default.
- W2001367742 citedByCount "27" @default.
- W2001367742 countsByYear W20013677422014 @default.
- W2001367742 countsByYear W20013677422020 @default.
- W2001367742 countsByYear W20013677422023 @default.
- W2001367742 crossrefType "journal-article" @default.
- W2001367742 hasAuthorship W2001367742A5008375074 @default.
- W2001367742 hasAuthorship W2001367742A5049088993 @default.
- W2001367742 hasAuthorship W2001367742A5074411433 @default.
- W2001367742 hasAuthorship W2001367742A5077927370 @default.
- W2001367742 hasConcept C111998727 @default.
- W2001367742 hasConcept C121120078 @default.
- W2001367742 hasConcept C152236973 @default.
- W2001367742 hasConcept C15920480 @default.
- W2001367742 hasConcept C159985019 @default.
- W2001367742 hasConcept C161790260 @default.
- W2001367742 hasConcept C178790620 @default.
- W2001367742 hasConcept C185592680 @default.
- W2001367742 hasConcept C188027245 @default.
- W2001367742 hasConcept C192562407 @default.
- W2001367742 hasConcept C2777566558 @default.
- W2001367742 hasConcept C2777954637 @default.
- W2001367742 hasConcept C44228677 @default.
- W2001367742 hasConcept C48396125 @default.
- W2001367742 hasConcept C521977710 @default.
- W2001367742 hasConceptScore W2001367742C111998727 @default.
- W2001367742 hasConceptScore W2001367742C121120078 @default.
- W2001367742 hasConceptScore W2001367742C152236973 @default.
- W2001367742 hasConceptScore W2001367742C15920480 @default.
- W2001367742 hasConceptScore W2001367742C159985019 @default.
- W2001367742 hasConceptScore W2001367742C161790260 @default.
- W2001367742 hasConceptScore W2001367742C178790620 @default.
- W2001367742 hasConceptScore W2001367742C185592680 @default.
- W2001367742 hasConceptScore W2001367742C188027245 @default.
- W2001367742 hasConceptScore W2001367742C192562407 @default.
- W2001367742 hasConceptScore W2001367742C2777566558 @default.
- W2001367742 hasConceptScore W2001367742C2777954637 @default.
- W2001367742 hasConceptScore W2001367742C44228677 @default.
- W2001367742 hasConceptScore W2001367742C48396125 @default.
- W2001367742 hasConceptScore W2001367742C521977710 @default.
- W2001367742 hasIssue "7" @default.
- W2001367742 hasLocation W20013677421 @default.
- W2001367742 hasOpenAccess W2001367742 @default.
- W2001367742 hasPrimaryLocation W20013677421 @default.
- W2001367742 hasRelatedWork W1881403694 @default.
- W2001367742 hasRelatedWork W1985182026 @default.
- W2001367742 hasRelatedWork W2007380535 @default.
- W2001367742 hasRelatedWork W2058934884 @default.
- W2001367742 hasRelatedWork W2065508149 @default.
- W2001367742 hasRelatedWork W2099160828 @default.
- W2001367742 hasRelatedWork W2369928481 @default.
- W2001367742 hasRelatedWork W2379746456 @default.
- W2001367742 hasRelatedWork W2591371344 @default.
- W2001367742 hasRelatedWork W3023313705 @default.
- W2001367742 hasVolume "4" @default.
- W2001367742 isParatext "false" @default.
- W2001367742 isRetracted "false" @default.
- W2001367742 magId "2001367742" @default.
- W2001367742 workType "article" @default.