Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 93: Issue 3
β-Crystallisation tendency and structure of polypropylene grafted by maleic anhydride and its blends with isotactic polypropylene
Authors:
A. Menyhárd

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G. Faludi Laboratory of Plastics and Rubber Technology Department of Physical Chemistry and Materials Science at Budapest University of Technology and Economics 1111 Budapest Müegyetem rkp. 3. H. ép. I. Hungary

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J. Varga Laboratory of Plastics and Rubber Technology Department of Physical Chemistry and Materials Science at Budapest University of Technology and Economics 1111 Budapest Müegyetem rkp. 3. H. ép. I. Hungary

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Pages:
937–945
Online Publication Date:
14 Oct 2008
Publication Date:
01 Sep 2008
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-007-8569-7
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Abstract  

Crystallization, melting and structure of three different commercial types of isotactic polypropylene (iPP) grafted by maleic anhydride (PP-g-MAH) with different maleic anhydride content (AC) and their β-nucleated versions were studied by X-ray diffractometry (WAXS), differential scanning calorimetry (DSC), polarised light microscopy (PLM) and scanning electron microscopy (SEM). The presence of maleic anhydride units disturbs the chain regularity, hereby decreases the crystallization tendency of iPP in general and the β-crystallisation ability in particular. β-modification of iPP (β-iPP) forms only in β-nucleated PP-g-MAH polymers studied if the anhydride content is not larger than 0.5 mass%. The influence of AC of PP-g-MAH on the feature the spherulitic structure is demonstrated by PLM and SEM micrographs. The β-nucleated iPP/PP-g-MAH blends containing 10 mass% PP-g-MAH crystallise predominantly in β-form independently of AC of the latter. The β-nuceated blends of iPP and PP-g-MAH with lowest AC crystallise in β-form in whole concentration range. The interaction parameter between iPP and PP-g-MAH polymers calculated by Nishi-Wang equation indicate limited interaction between the components.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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