Abstract
| Language | English |
|---|---|
| Pages | 1099-1105 |
| Number of pages | 7 |
| Journal | Polymer Degradation and Stability |
| Volume | 95 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Jun 2010 |
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Keywords
- polyurethane
- POSS
- thermal degradation
- elastomer
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Thermal degradation studies of polyurethane/POSS nanohybrid elastomers. / Lewicki, James P.; Pielichowski, Krzysztof; De la Croix, Pauline Tremblot; Janowski, Bartlomiej; Todd, Deborah; Liggat, John J.
In: Polymer Degradation and Stability, Vol. 95, No. 6, 06.2010, p. 1099-1105.Research output: Contribution to journal › Article
TY - JOUR
T1 - Thermal degradation studies of polyurethane/POSS nanohybrid elastomers
AU - Lewicki, James P.
AU - Pielichowski, Krzysztof
AU - De la Croix, Pauline Tremblot
AU - Janowski, Bartlomiej
AU - Todd, Deborah
AU - Liggat, John J.
PY - 2010/6
Y1 - 2010/6
N2 - 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 an approximately 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, CO2, water and increased levels of THF as products of thermal degradation.
AB - 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 an approximately 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, CO2, water and increased levels of THF as products of thermal degradation.
KW - polyurethane
KW - POSS
KW - thermal degradation
KW - elastomer
UR - http://www.scopus.com/inward/record.url?scp=77953134247&partnerID=8YFLogxK
UR - http://www.elsevier.com/wps/find/journaldescription.cws_home/405941/description#description
U2 - 10.1016/j.polymdegradstab.2010.02.021
DO - 10.1016/j.polymdegradstab.2010.02.021
M3 - Article
VL - 95
SP - 1099
EP - 1105
JO - Polymer Degradation and Stability
T2 - Polymer Degradation and Stability
JF - Polymer Degradation and Stability
SN - 0141-3910
IS - 6
ER -