Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 41: Issue 2-3
Thermal stability enhancement of polyurethanes by surface treatment
Authors:
J. FlynnScientific Thermal Research and Data Analysis (STRDA) 5309 Iroquois Road 20816 Bethesda Maryland USA

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Z. PetrovicUniversity of Massachusetts Department of Polymer Science and Engineering 01003 Amherst Massachusetts USA

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Pages:
549–561
Online Publication Date:
09 Jan 2007
Publication Date:
01 Feb 1994
Article Category:
Research Article
DOI:
https://doi.org/10.1007/bf02549334
Keywords:
diffusion; mass-loss kinetics; polyurethanes; surface blockage; thermal stability; TG
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Abstract  

Both oxidation and methoxymethylation of the surfaces of a series of MDI (methylene diphenyl isocyanate) and TDI (toluene diisocyanate) polyether and polyester soft segment 1–4 butanediol polyurethanes result in increased thermal stability as measured by TG. Explosive loss of mass above the hard segment melting temperature suggests that the diffusion of the dissociated diisocyanate moiety is hindered at lower temperatures. Thus suppression of the depolycondensation reaction by chemical blockage of the surface may result in a material with an increased service life at use temperatures as thermal stability of a polyurethane may depend upon the low diffusivity of its diisocyanate comonomer. The effect of vacuum, oxygen and water vapor on the kinetics of mass-loss of several of the polyurethanes is presented.

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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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