TY - JOUR
T1 - Effects of moisture on the glass transition temperature of polyurethane shape memory polymer filled with nano-carbon powder
AU - Yang, Bin
AU - Huang, Wei Min
AU - Li, Chuan
AU - Chor, Jun Hoe
N1 - Funding Information:
This project is partially supported by an ACRF (RG 16/00) from the Nanyang Technological University, Singapore.
PY - 2005/5
Y1 - 2005/5
N2 - One simple approach to produce electrically conductive polymers is to fill them with conductive powders. This paper investigates the effects of moisture on the glass transition temperature of a polyurethane shape memory polymer (SMP) filled with nano-carbon powders. It is found that the SMP composites before immersion in water have a slightly lower glass transition temperature, and in the mean time, the moisture fraction at the saturation point upon immersion is also lower. On the other hand, the moisture can remarkably reduce the glass transition temperature of the composites. Heating to over 180 °C is an effective way to remove the moisture, which also results in the glass transition temperature back to the original. As the glass transition temperature can be greatly reduced by moisture, a novel feature, namely, the water actutable recovery of SMP composites is also proposed based on this study.
AB - One simple approach to produce electrically conductive polymers is to fill them with conductive powders. This paper investigates the effects of moisture on the glass transition temperature of a polyurethane shape memory polymer (SMP) filled with nano-carbon powders. It is found that the SMP composites before immersion in water have a slightly lower glass transition temperature, and in the mean time, the moisture fraction at the saturation point upon immersion is also lower. On the other hand, the moisture can remarkably reduce the glass transition temperature of the composites. Heating to over 180 °C is an effective way to remove the moisture, which also results in the glass transition temperature back to the original. As the glass transition temperature can be greatly reduced by moisture, a novel feature, namely, the water actutable recovery of SMP composites is also proposed based on this study.
KW - Carbon powder
KW - Electrically conductive
KW - Functionally gradient
KW - Glass transition temperature
KW - Moisture
KW - Polyurethane
KW - Shape memory polymer
UR - https://www.scopus.com/pages/publications/14544285971
U2 - 10.1016/j.eurpolymj.2004.11.029
DO - 10.1016/j.eurpolymj.2004.11.029
M3 - Article
AN - SCOPUS:14544285971
SN - 0014-3057
VL - 41
SP - 1123
EP - 1128
JO - European Polymer Journal
JF - European Polymer Journal
IS - 5
ER -