Thermal degradation studies of polyurethane/POSS nanohybrid elastomers

Reported here is the synthesis of a series of polyurethane/POSS nanohybrid elastomers, the characterisation of their thermal stability and degradation behaviour at elevated temperatures using a combination of thermogravimetric Analysis (TGA) and thermal volatilisation analysis (TVA). A series of PU...

Full description

Saved in:
Bibliographic Details
Published in:Polymer degradation and stability 2010-06, Vol.95 (6), p.1099-1105
Main Authors: Lewicki, James P., Pielichowski, Krzysztof, De La Croix, Pauline Tremblot, Janowski, Bartlomiej, Todd, Deborah, Liggat, John J.
Format: Article
Language:English
Subjects:
Applied sciences
BUTANE
CHAINS
Chemical modifications
Degradation
DISTRIBUTION
Elastomer
ELASTOMERS
EVAPORATION
Exact sciences and technology
HYBRID SYSTEMS
Inorganic and organomineral polymers
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
Nanomaterials
Nanostructure
Physicochemistry of polymers
Polyurethane
Polyurethane resins
POSS
STABILITY
SYNTHESIS
THERMAL DEGRADATION
THERMAL GRAVIMETRIC ANALYSIS
Thermal stability
WATER
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Reported here is the synthesis of a series of polyurethane/POSS nanohybrid elastomers, the characterisation of their thermal stability and degradation behaviour at elevated temperatures using a combination of thermogravimetric Analysis (TGA) and thermal volatilisation analysis (TVA). A series of PU elastomer systems have been formulated incorporating varying levels of 1,2-propanediol-heptaisobutyl-POSS (PHIPOSS) as a chain extender unit, replacing butane diol. The bulk thermal stability of the nanohybrid systems has been characterised using TGA. Results indicate that covalent incorporation of POSS into the PU elastomer network increases the non-oxidative thermal stability of the systems. TVA analysis of the thermal degradation of the POSS/PU hybrid elastomers have demonstrated that the hybrid systems are indeed more thermally stable when compared to the unmodified PU matrix; evolving significantly reduced levels of volatile degradation products and exhibiting a ∼30 °C increase in onset degradation temperature. Furthermore, characterisation of the distribution of degradation products from both unmodified and hybrid systems indicate that the inclusion of POSS in the PU network is directly influencing the degradation pathways of both the soft and hard-block components of the elastomers: The POSS/PU hybrid systems show reduced levels of CO, CO 2, water and increased levels of THF as products of thermal degradation.
ISSN:0141-3910
1873-2321
DOI:10.1016/j.polymdegradstab.2010.02.021