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On the rheological characterization of linear and branched metallocene polypropylenes prepared by reactive extrusion process

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F07%3A63505428" target="_blank" >RIV/70883521:28110/07:63505428 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    On the rheological characterization of linear and branched metallocene polypropylenes prepared by reactive extrusion process

  • Original language description

    The aim of this contribution is to compare rheological behavior of three different samples of metallocene catalyzed polypropylene [virgin (linear) metallocene polypropylene (mPP), and (branched) mPPs prepared through reactive processing with (0.01 wt %)and without peroxide]. For their rheological description in different flow situations (shear and elongational) the eXtended Pom-Pom (XPP) and PTT-XPP models were used. A rotational rheometer (ARES 2000) with the SER Universal Testing Platform were used for the measurement of dynamic data (storage G' and loss G'' moduli) and uniaxial extensional viscosity. It was shown that both processed (branched) mPPs (with and without peroxide) exhibit distinct behavior in uniaxial extensional viscosity (appearance of strain hardening) in comparison to the virgin (linear) mPP. The XPP and PTT-XPP models proved their usefulness for a branching level quantification based on the measurements of steady shear and elongational viscosities. On the other han

  • Czech name

    Reologická charakterizace lineárních a rozvětvených metalocenových polypropylenů připravených reaktivním vytlačováním

  • Czech description

    Cílem této práce je porovnat reologické chování tří odlišných metalocenových typů polypropylenů připravených reaktivním vytlačováním. Tokové chování bylo následně popsáno molekulárními konstitučními rovnicemi (XPP, PTT-XPP) a bylo překvapivě zjištěno, žezkoumané vzorky polypropylenů neobsahují větvení typu H.

Classification

  • Type

    D - Article in proceedings

  • CEP classification

    CD - Macromolecular chemistry

  • OECD FORD branch

Result continuities

  • Project

    <a href="/en/project/IAA200600703" target="_blank" >IAA200600703: Investigation of flow behaviour for a novel class of metallocene-based polymers</a><br>

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2007

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Article name in the collection

    Polymer Processing Society Europe/Africa Regional Meeting 2007 

  • ISBN

    87-89753-56-9

  • ISSN

  • e-ISSN

  • Number of pages

    8

  • Pages from-to

    "CD1"-"CD8"

  • Publisher name

    Hexagon Holding

  • Place of publication

    Copenhagen

  • Event location

  • Event date

  • Type of event by nationality

  • UT code for WoS article