The effect of PP molecular weight on the complex viscosity of PP/EPDM blends
The effect of the molecular weight of isotactic polypropylene (PP) on the complex viscosity of unvulcanized and dynamically vulcanized blends of PP with ethylene-propylene-diene monomer (EPDM) was investigated. It was shown that individual PPs and PP/EPDM blends demonstrate a shear thinning behavior...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Budapest University of Technology
2021-02-01
|
| Series: | eXPRESS Polymer Letters |
| Subjects: | |
| Online Access: | http://www.expresspolymlett.com/letolt.php?file=EPL-0010795&mi=cd |
| _version_ | 1818791930339786752 |
|---|---|
| author | E. V. Prut T. I. Medintseva O. P. Kuznetsova |
| author_facet | E. V. Prut T. I. Medintseva O. P. Kuznetsova |
| author_sort | E. V. Prut |
| collection | DOAJ |
| description | The effect of the molecular weight of isotactic polypropylene (PP) on the complex viscosity of unvulcanized and dynamically vulcanized blends of PP with ethylene-propylene-diene monomer (EPDM) was investigated. It was shown that individual PPs and PP/EPDM blends demonstrate a shear thinning behavior. The flow index varied with frequency and elastomer content for all blends. The dependences of complex viscosity versus PP molecular weight were observed for unvulcanized blends based on 25 wt% EPDM. The viscosity of composition with higher elastomer content was not practically affected by the variation of PP molecular weight. The complex viscosity of dynamically vulcanized blends depended on PP molecular weight, blend composition, and nature of crosslinking agents. |
| first_indexed | 2024-12-18T15:19:10Z |
| format | Article |
| id | doaj.art-363a68c31e6c4246838ac696470e9003 |
| institution | Directory Open Access Journal |
| issn | 1788-618X |
| language | English |
| last_indexed | 2024-12-18T15:19:10Z |
| publishDate | 2021-02-01 |
| publisher | Budapest University of Technology |
| record_format | Article |
| series | eXPRESS Polymer Letters |
| spelling | doaj.art-363a68c31e6c4246838ac696470e90032022-12-21T21:03:26ZengBudapest University of TechnologyeXPRESS Polymer Letters1788-618X2021-02-0115216617610.3144/expresspolymlett.2021.15The effect of PP molecular weight on the complex viscosity of PP/EPDM blendsE. V. PrutT. I. MedintsevaO. P. KuznetsovaThe effect of the molecular weight of isotactic polypropylene (PP) on the complex viscosity of unvulcanized and dynamically vulcanized blends of PP with ethylene-propylene-diene monomer (EPDM) was investigated. It was shown that individual PPs and PP/EPDM blends demonstrate a shear thinning behavior. The flow index varied with frequency and elastomer content for all blends. The dependences of complex viscosity versus PP molecular weight were observed for unvulcanized blends based on 25 wt% EPDM. The viscosity of composition with higher elastomer content was not practically affected by the variation of PP molecular weight. The complex viscosity of dynamically vulcanized blends depended on PP molecular weight, blend composition, and nature of crosslinking agents.http://www.expresspolymlett.com/letolt.php?file=EPL-0010795&mi=cdrheologyisotactic polypropyleneethylene-propylene-diene monomerdynamic vulcanizationcomplex viscosity |
| spellingShingle | E. V. Prut T. I. Medintseva O. P. Kuznetsova The effect of PP molecular weight on the complex viscosity of PP/EPDM blends eXPRESS Polymer Letters rheology isotactic polypropylene ethylene-propylene-diene monomer dynamic vulcanization complex viscosity |
| title | The effect of PP molecular weight on the complex viscosity of PP/EPDM blends |
| title_full | The effect of PP molecular weight on the complex viscosity of PP/EPDM blends |
| title_fullStr | The effect of PP molecular weight on the complex viscosity of PP/EPDM blends |
| title_full_unstemmed | The effect of PP molecular weight on the complex viscosity of PP/EPDM blends |
| title_short | The effect of PP molecular weight on the complex viscosity of PP/EPDM blends |
| title_sort | effect of pp molecular weight on the complex viscosity of pp epdm blends |
| topic | rheology isotactic polypropylene ethylene-propylene-diene monomer dynamic vulcanization complex viscosity |
| url | http://www.expresspolymlett.com/letolt.php?file=EPL-0010795&mi=cd |
| work_keys_str_mv | AT evprut theeffectofppmolecularweightonthecomplexviscosityofppepdmblends AT timedintseva theeffectofppmolecularweightonthecomplexviscosityofppepdmblends AT opkuznetsova theeffectofppmolecularweightonthecomplexviscosityofppepdmblends AT evprut effectofppmolecularweightonthecomplexviscosityofppepdmblends AT timedintseva effectofppmolecularweightonthecomplexviscosityofppepdmblends AT opkuznetsova effectofppmolecularweightonthecomplexviscosityofppepdmblends |