Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 91: Issue 3
Thermal analysis of cellulose acetate modified with caprolactone
Authors:
Gy. Számel

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Szilvia Klébert

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I. Sajó Hungarian Academy of Sciences Institute of Structural Chemistry, Chemical Research Center 1525 Budapest P.O. Box 17 Hungary

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B. Pukánszky

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Pages:
715–722
Online Publication Date:
16 Jun 2008
Publication Date:
01 Mar 2008
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-007-8684-5
Keywords:
calorimetry; caprolactone; cellulose acetate; dynamic mechanical analysis; grafting; relaxation transitions
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Abstract  

Cellulose acetate (CA) was modified with caprolactone (CL) under various reaction conditions in an internal mixer. The thermal behavior and relaxation transitions of the samples were determined by dynamic mechanical analysis and differential scanning calorimetry. Various relaxation transitions were detected in externally and internally modified cellulose acetate by DMTA. These were assigned to the glass transition of the main chain, to the movement of single glucose units and to hydroxymethyl groups. The β′ transition must belong to structural units larger than a single glucose ring and their formation must depend on sample preparation conditions. No transition could be assigned to grafted polycaprolactone (PCL) chains by DMTA. Contrary to other groups, we could not detect even the transitions of modified CA by DSC. Only the crystallization of oligomeric PCL homopolymer was observed mostly when it diffused to the surface of the sample.

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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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