Structural features and relaxation properties of PET/PC blends containing impact strength modifier and chain extender
It has been investigated how methylene diphenyl diisocyanate (MDI) influences the morphology, rheological, mechanical and relaxation properties, as well as PET crystallizability, of PET/PC/(PP/EPDM) ternary blends produced by the reactive extrusion process. It appears that irrespective of phase stru...
| Format: | Article |
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| Language: | English |
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Budapest University of Technology
2009-10-01
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| Series: | eXPRESS Polymer Letters |
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| Online Access: | http://www.expresspolymlett.com/letolt.php?file=EPL-0001037&mi=cd |
| _version_ | 1818690337723383808 |
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| collection | DOAJ |
| description | It has been investigated how methylene diphenyl diisocyanate (MDI) influences the morphology, rheological, mechanical and relaxation properties, as well as PET crystallizability, of PET/PC/(PP/EPDM) ternary blends produced by the reactive extrusion process. It appears that irrespective of phase structure of the blends, MDI causes a rise in melt viscosity (decreased MFI-values) of the material which is the result of an increased molecular weight of the macromolecules; PET crystallization becomes retarded. MDI improves compatibility between PET and PC in PET/PC/(PP/EPDM) ternary blends. Addition of MDI leads to higher values of the dynamic shear modulus for PET high elastic state (in the temperature range between Tg PET and cool crystallization temperature of PET); the PET cool crystallization and melt crystallization processes become retarded; the PET and PC glass transition temperatures approach one another. MDI has been shown not to influence significantly the blend morphology or the character of interaction between the PP/EPDM disperse phase and PET/PC blend matrix. |
| first_indexed | 2024-12-17T12:24:24Z |
| format | Article |
| id | doaj.art-bf84fc4ea9b84c949d1e614e3d77e4fb |
| institution | Directory Open Access Journal |
| issn | 1788-618X |
| language | English |
| last_indexed | 2024-12-17T12:24:24Z |
| publishDate | 2009-10-01 |
| publisher | Budapest University of Technology |
| record_format | Article |
| series | eXPRESS Polymer Letters |
| spelling | doaj.art-bf84fc4ea9b84c949d1e614e3d77e4fb2022-12-21T21:48:50ZengBudapest University of TechnologyeXPRESS Polymer Letters1788-618X2009-10-0131060661410.3144/expresspolymlett.2009.76Structural features and relaxation properties of PET/PC blends containing impact strength modifier and chain extenderIt has been investigated how methylene diphenyl diisocyanate (MDI) influences the morphology, rheological, mechanical and relaxation properties, as well as PET crystallizability, of PET/PC/(PP/EPDM) ternary blends produced by the reactive extrusion process. It appears that irrespective of phase structure of the blends, MDI causes a rise in melt viscosity (decreased MFI-values) of the material which is the result of an increased molecular weight of the macromolecules; PET crystallization becomes retarded. MDI improves compatibility between PET and PC in PET/PC/(PP/EPDM) ternary blends. Addition of MDI leads to higher values of the dynamic shear modulus for PET high elastic state (in the temperature range between Tg PET and cool crystallization temperature of PET); the PET cool crystallization and melt crystallization processes become retarded; the PET and PC glass transition temperatures approach one another. MDI has been shown not to influence significantly the blend morphology or the character of interaction between the PP/EPDM disperse phase and PET/PC blend matrix.http://www.expresspolymlett.com/letolt.php?file=EPL-0001037&mi=cdPolymer blends and alloyspoly(ethylene terephthalate)polycarbonatemodifier of impact strengthchain extender |
| spellingShingle | Structural features and relaxation properties of PET/PC blends containing impact strength modifier and chain extender eXPRESS Polymer Letters Polymer blends and alloys poly(ethylene terephthalate) polycarbonate modifier of impact strength chain extender |
| title | Structural features and relaxation properties of PET/PC blends containing impact strength modifier and chain extender |
| title_full | Structural features and relaxation properties of PET/PC blends containing impact strength modifier and chain extender |
| title_fullStr | Structural features and relaxation properties of PET/PC blends containing impact strength modifier and chain extender |
| title_full_unstemmed | Structural features and relaxation properties of PET/PC blends containing impact strength modifier and chain extender |
| title_short | Structural features and relaxation properties of PET/PC blends containing impact strength modifier and chain extender |
| title_sort | structural features and relaxation properties of pet pc blends containing impact strength modifier and chain extender |
| topic | Polymer blends and alloys poly(ethylene terephthalate) polycarbonate modifier of impact strength chain extender |
| url | http://www.expresspolymlett.com/letolt.php?file=EPL-0001037&mi=cd |