TY - GEN
T1 - Functionally graded shape memory polymer
AU - Lee, Kyung Min
AU - Mather, Patrick T.
PY - 2007
Y1 - 2007
N2 - In this paper, we present a new concept in for shape memory polymers (SMPs): functionally graded SMP. To make such a material, a commercially available UV curable polymer, NOA63, was cured by high intensity ultraviolet irradiation for various reaction times ranging from 5 min to 3.5 hours. The photo-cured NOA63 samples were characterized using differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), and optical microscopy (OM) in order to investigate the high quality of shape fixing and recovery. The glass transition temperature was precisely controlled by varying the UV exposure time, resulting in NOA63 having Tg from 30 °C to 47 °C DMA measurements for NOA63 revealed increasing tensile storage modulus with increasing crosslink density. A NOA63 sample was photo-cured in a spatially graded fashion, with different exposure times at different positions on for the same sample, demonstrating the possible usage of an optical temperature sensor or medical devices. Bulk and surface shape memory responses were investigated, revealing high quality shape fixing and recovery.
AB - In this paper, we present a new concept in for shape memory polymers (SMPs): functionally graded SMP. To make such a material, a commercially available UV curable polymer, NOA63, was cured by high intensity ultraviolet irradiation for various reaction times ranging from 5 min to 3.5 hours. The photo-cured NOA63 samples were characterized using differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), and optical microscopy (OM) in order to investigate the high quality of shape fixing and recovery. The glass transition temperature was precisely controlled by varying the UV exposure time, resulting in NOA63 having Tg from 30 °C to 47 °C DMA measurements for NOA63 revealed increasing tensile storage modulus with increasing crosslink density. A NOA63 sample was photo-cured in a spatially graded fashion, with different exposure times at different positions on for the same sample, demonstrating the possible usage of an optical temperature sensor or medical devices. Bulk and surface shape memory responses were investigated, revealing high quality shape fixing and recovery.
KW - Gadual UV curing
KW - Photo-curable shape memory polymer
KW - Surface and bulk shape memory behaviors
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M3 - Conference contribution
AN - SCOPUS:34648823773
SN - 1604232145
SN - 9781604232141
T3 - Annual Technical Conference - ANTEC, Conference Proceedings
SP - 826
EP - 829
BT - Society of Plastics Engineers Annual Technical Conference
T2 - Society of Plastics Engineers Annual Technical Conference: Plastics Encounter at ANTEC 2007
Y2 - 6 May 2007 through 11 May 2007
ER -