Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
The general link between random scissions in linear polymers, changes in average chain length and the Mark-Houwink equation
KTH, Skolan för kemivetenskap (CHE), Kemi, Kärnkemi.
2005 (engelsk)Inngår i: Polymer degradation and stability, ISSN 0141-3910, E-ISSN 1873-2321, Vol. 88, nr 2, s. 159-167Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Theories for random scission degradation of polymers are motivated from the basic scientific interest in reaction kinetics and yields of process. There is a tradition to derive scission-measures (bond consumption or cleavage) from the number average of chain length in a molecular weight distribution. It is understood by many that the validity of these derivations will be conditional and many attempts are made to extend the accuracy of the models. This article presents a mass-based derivation for changes in chain length that offers scission-values not only from number averages but also from the mass and viscosity averages, independent of molecular weight distribution profile. The derivation shows the interdependence between the Mark-Houwink equation and scission calculus. The exponent in the Mark-Houwink equation is proposed to originate from the process of varying polymer chain lengths for calibration and the initial content of polymer chain ends in the sample as well as the earlier proposed effects from chain curl. Calculation of the number of random scission hence demands the Mark-Houwink parameters to be calibrated by varying polymer chain lengths using random scission generation.

sted, utgiver, år, opplag, sider
2005. Vol. 88, nr 2, s. 159-167
Emneord [en]
polymer degradation, radiolytic degradation, cellulose, number average, mass average, viscosity average, scissions, bond consumption, paper permanence, degradation, cellulose, prediction
Identifikatorer
URN: urn:nbn:se:kth:diva-14634DOI: 10.1016/j.polymdegradstab.2003.09.022ISI: 000227915900001Scopus ID: 2-s2.0-14544289902OAI: oai:DiVA.org:kth-14634DiVA, id: diva2:332675
Merknad
QC 20100525Tilgjengelig fra: 2010-08-05 Laget: 2010-08-05 Sist oppdatert: 2017-12-12bibliografisk kontrollert

Open Access i DiVA

Fulltekst mangler i DiVA

Andre lenker

Forlagets fulltekstScopus

Søk i DiVA

Av forfatter/redaktør
Lind, Johan
Av organisasjonen
I samme tidsskrift
Polymer degradation and stability

Søk utenfor DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric

doi
urn-nbn
Totalt: 204 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf