Characterization of the morphology of iPP/sPP blends with various compositions
The paper investigates the morphology and the structural properties of blends of isotactic polypropylene (iPP) and syndiotactic polypropylene (sPP) having different compositions using different techniques. Solid-state nuclear magnetic resonance (NMR) permits via appropriate sequence to measure the c...
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| Format: | Article |
| Language: | English |
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Budapest University of Technology and Economics
2013-03-01
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| Series: | eXPRESS Polymer Letters |
| Subjects: | |
| Online Access: | http://www.expresspolymlett.com/letolt.php?file=EPL-0003991&mi=cd |
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| _version_ | 1849415905672429568 |
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| author | S. Bourbigot L. Garnier B. Revel S. Duquesne |
| author_facet | S. Bourbigot L. Garnier B. Revel S. Duquesne |
| author_sort | S. Bourbigot |
| collection | DOAJ |
| description | The paper investigates the morphology and the structural properties of blends of isotactic polypropylene (iPP) and syndiotactic polypropylene (sPP) having different compositions using different techniques. Solid-state nuclear magnetic resonance (NMR) permits via appropriate sequence to measure the composition, conformation and dynamics, and intimacy of mixing of polymeric materials. Measurement of relaxation times gives information on local structure of phases with different mobility. The morphology is directly related to the structural organization of the blends. The crystallization rate decreases as a function of the sPP content. The minor component is dispersed as a nodule in the main component of the blend and it plays the role of nucleating agent on it. Besides, morphology changes occur for the composition 50/50 (wt/wt) of the blend iPP/sPP. Different phases are identified, namely free amorphous, constrained amorphous and crystalline regions which exhibit different molecular mobilities. It is also shown at the interphase matrix-nodules, the nodules create a constrained amorphous zone. |
| format | Article |
| id | doaj-art-4ddebf46868f44cc8aea01f079a38cb3 |
| institution | Kabale University |
| issn | 1788-618X |
| language | English |
| publishDate | 2013-03-01 |
| publisher | Budapest University of Technology and Economics |
| record_format | Article |
| series | eXPRESS Polymer Letters |
| spelling | doaj-art-4ddebf46868f44cc8aea01f079a38cb32025-08-20T03:33:21ZengBudapest University of Technology and EconomicseXPRESS Polymer Letters1788-618X2013-03-017322423710.3144/expresspolymlett.2013.21Characterization of the morphology of iPP/sPP blends with various compositionsS. BourbigotL. GarnierB. RevelS. DuquesneThe paper investigates the morphology and the structural properties of blends of isotactic polypropylene (iPP) and syndiotactic polypropylene (sPP) having different compositions using different techniques. Solid-state nuclear magnetic resonance (NMR) permits via appropriate sequence to measure the composition, conformation and dynamics, and intimacy of mixing of polymeric materials. Measurement of relaxation times gives information on local structure of phases with different mobility. The morphology is directly related to the structural organization of the blends. The crystallization rate decreases as a function of the sPP content. The minor component is dispersed as a nodule in the main component of the blend and it plays the role of nucleating agent on it. Besides, morphology changes occur for the composition 50/50 (wt/wt) of the blend iPP/sPP. Different phases are identified, namely free amorphous, constrained amorphous and crystalline regions which exhibit different molecular mobilities. It is also shown at the interphase matrix-nodules, the nodules create a constrained amorphous zone.http://www.expresspolymlett.com/letolt.php?file=EPL-0003991&mi=cdPolymer blends and alloyssyndiotactic polypropyleneisotactic polypropylenemorphology |
| spellingShingle | S. Bourbigot L. Garnier B. Revel S. Duquesne Characterization of the morphology of iPP/sPP blends with various compositions eXPRESS Polymer Letters Polymer blends and alloys syndiotactic polypropylene isotactic polypropylene morphology |
| title | Characterization of the morphology of iPP/sPP blends with various compositions |
| title_full | Characterization of the morphology of iPP/sPP blends with various compositions |
| title_fullStr | Characterization of the morphology of iPP/sPP blends with various compositions |
| title_full_unstemmed | Characterization of the morphology of iPP/sPP blends with various compositions |
| title_short | Characterization of the morphology of iPP/sPP blends with various compositions |
| title_sort | characterization of the morphology of ipp spp blends with various compositions |
| topic | Polymer blends and alloys syndiotactic polypropylene isotactic polypropylene morphology |
| url | http://www.expresspolymlett.com/letolt.php?file=EPL-0003991&mi=cd |
| work_keys_str_mv | AT sbourbigot characterizationofthemorphologyofippsppblendswithvariouscompositions AT lgarnier characterizationofthemorphologyofippsppblendswithvariouscompositions AT brevel characterizationofthemorphologyofippsppblendswithvariouscompositions AT sduquesne characterizationofthemorphologyofippsppblendswithvariouscompositions |