scholarly journals Effects of Isophorone Diisocyanate on the Thermal and Mechanical Properties of Shape-Memory Polyurethane Foams

2014 ◽  
Vol 215 (24) ◽  
pp. 2420-2429 ◽  
Author(s):  
Sayyeda M. Hasan ◽  
Jeffery E. Raymond ◽  
Thomas S. Wilson ◽  
Brandis K. Keller ◽  
Duncan J. Maitland
Keyword(s):  
Mechanical Properties ◽  
Shape Memory ◽  
Polyurethane Foams ◽  
Thermal And Mechanical Properties ◽  
Isophorone Diisocyanate ◽  
Shape Memory Polyurethane

Effects of ionic liquid types on the tribological, mechanical, and thermal properties of ionic liquid modified graphene/polyimide shape memory composites

2021 ◽  
pp. 095400832199676
Author(s):  
Yuting Ouyang ◽  
Qiu Zhang ◽  
Xiukun Liu ◽  
Ruan Hong ◽  
Xu Xu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Ionic Liquid ◽  
Composite Materials ◽  
Shape Memory ◽  
Recovery Rate ◽  
Shape Recovery ◽  
Graphene Nanosheets ◽  
Mechanical And Thermal Properties ◽  
Thermal And Mechanical Properties ◽  
Modified Graphene

Different ionic liquid modified graphene nanosheets (IG) were induced into polyimide (PI) to improve the tribological, thermal, and mechanical properties of shape memory IG/PI composites. The results demonstrated that when using 1-aminoethyl-3-methylimidazole bromide to modify graphene nanosheets (IG-1), the laser-driven shape recovery rate of IG-1/PI composites (IGPI-1) reached 73.02%, which was 49.36% higher than that of pure PI. In addition, the IGPI-1 composite materials reached the maximum shape recovery rate within 15 s. Additionally, under dry sliding, the addition of IG can significantly improve the tribological properties of composite materials. IGPI-1 exhibited the best self-lubricating properties. Compared with pure PI, the friction coefficient (0.19) and wear rate (2.62 × 10–5) mm3/Nm) were reduced by 44.1% and 24.2%, respectively, and the T10% of IGPI-1 increased by 32.2°C. The Tg of IGPI-1 reached 256.5°C, which was 8.4°C higher than that of pure PI. In addition, the tensile strength and modulus of IGPI-1 reached 82.3 MPa and 1.18 GPa, which were significantly increased by 33.6% and 29.8%, respectively, compared with pure PI. We hope that this work will be helpful for the preparation of shape memory materials with excellent tribological, thermal, and mechanical properties.

scholarly journals Examination of radio-opacity enhancing additives in shape memory polyurethane foams

2015 ◽  
Vol 132 (23) ◽  
pp. n/a-n/a ◽  
Author(s):  
Andrew C. Weems ◽  
Jeffery E. Raymond ◽  
Kevin T. Wacker ◽  
Tiffany P. Gustafson ◽  
Brandis Keller ◽  
...  
Keyword(s):  
Shape Memory ◽  
Polyurethane Foams ◽  
Shape Memory Polyurethane

scholarly journals Ultra low density and highly crosslinked biocompatible shape memory polyurethane foams

2012 ◽  
Vol 50 (10) ◽  
pp. 724-737 ◽  
Author(s):  
Pooja Singhal ◽  
Jennifer N. Rodriguez ◽  
Ward Small ◽  
Scott Eagleston ◽  
Judy Van de Water ◽  
...  
Keyword(s):  
Shape Memory ◽  
Polyurethane Foams ◽  
Low Density ◽  
Shape Memory Polyurethane

Chemico-physical modifications induced by plasma and ozone sterilizations on shape memory polyurethane foams

2010 ◽  
Vol 21 (7) ◽  
pp. 2067-2078 ◽  
Author(s):  
Luigi De Nardo ◽  
Monica Moscatelli ◽  
Federica Silvi ◽  
Maria Cristina Tanzi ◽  
L’Hocine Yahia ◽  
...  
Keyword(s):  
Shape Memory ◽  
Polyurethane Foams ◽  
Shape Memory Polyurethane

Impact of blowing agent-blends on polyurethane foams thermal and mechanical properties

2020 ◽  
Author(s):  
Harith H. Al-Moameri ◽  
Baydaa Jaber Nabhan ◽  
Tawfeeq Wasmi M. ◽  
Mohammed Ali Abdulrehman
Keyword(s):  
Mechanical Properties ◽  
Polyurethane Foams ◽  
Thermal And Mechanical Properties ◽  
Blowing Agent
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