Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 48: Issue 6
Detection of compatibility of some rubber blends by DSC
Authors:
A. Yehia Department of Polymers, National Research Centre, Cairo, Egypt

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A. Mansour Department of Chemistry, Cairo University, Giza, Egypt

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, and
B. Stoll Department of Applied Physics, Ulm University, Ulm, Germany

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Pages:
1299–1310
Online Publication Date:
03 Aug 2005
Publication Date:
01 Jun 1997
Article Category:
Research Article
DOI:
https://doi.org/10.1007/bf01983440
Keywords:
compatibility; DSC; master curves; mechanical measurements; rubber blends
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Abstract  

The compatibility of some technically important polymer blends, namely BR/NR, NR/NBR and CR/NBR, has been investigated using the DSC method. In addition, dynamic mechanical measurements have been carried out for the NR/NBR blends over the frequency range of 10−4 Hz –200 Hz and temperatures ranging from −70 to +70°C. The results obtained show that the three rubber blends are not compatible over the entire composition range as proven by the DSC and mechanical measurements. By analyzing the heat capacity increases at the glass transitions of the separate phases in the NR/BR blend, it was possible to suggest the presence of a limited compatibility at the boundaries of the two phases. By comparing this work with prior measurements, it was possible to conclude that the calorimetric method is a more efficient tool for the study of compatibility of polymer blends when compared to ultrasonic and viscosity methods. Furthermore, it was found that polymers that show compatibility when measured with an ultrasonic method could behave compatible, semicompatible or incompatible when analyzed by DSC. On the other hand, blends that show incompatibility by the ultrasonic method are always incompatible by the DSC method.

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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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