TY - JOUR
T1 - Improvement of the low-temperature property of aliphatic polycarbonate glycols-based polyurethane elastomers
AU - Kojio, Ken
AU - Furukawa, Mutsuhisa
AU - Shimada, Machiko
AU - Shimada, Makoto
AU - Komatsu, Takuya
AU - Nozaki, Shuhei
AU - Motokucho, Suguru
AU - Yoshinaga, Kohji
N1 - Publisher Copyright:
© 2015 by American Scientific Publishers.
PY - 2015
Y1 - 2015
N2 - Structure-property relationship of polyurethane elastomers (PUEs) based on aliphatic carbonate glycols (PCglycols) with various molecular weights (HO-[(CH2)mOC(=O)O]n-(CH2)m-OH, m = 3 and 6, Mn = 1000-3000) were investigated to improve their low-temperature property. Differential scanning calorimetry (DSC) measurement revealed that the glass transition temperature (Tg) of the soft segment in the PUEs decreased ca. 10-25 oC and crystallized hard segment exhibited larger heat of fusion with increasing molecular weight of the PC-glycol. This trend clearly implies that the degree of microphase separation of the PUEs became stronger with an increase in molecular weight of the PC-glycol. In the tensile testing, Young's modulus and tensile strength increased with increase in the degree of microphase separation. In other words, an increase in molecular weight of the PC-glycol gives the PUEs bearing lower Tg and superior mechanical properties.
AB - Structure-property relationship of polyurethane elastomers (PUEs) based on aliphatic carbonate glycols (PCglycols) with various molecular weights (HO-[(CH2)mOC(=O)O]n-(CH2)m-OH, m = 3 and 6, Mn = 1000-3000) were investigated to improve their low-temperature property. Differential scanning calorimetry (DSC) measurement revealed that the glass transition temperature (Tg) of the soft segment in the PUEs decreased ca. 10-25 oC and crystallized hard segment exhibited larger heat of fusion with increasing molecular weight of the PC-glycol. This trend clearly implies that the degree of microphase separation of the PUEs became stronger with an increase in molecular weight of the PC-glycol. In the tensile testing, Young's modulus and tensile strength increased with increase in the degree of microphase separation. In other words, an increase in molecular weight of the PC-glycol gives the PUEs bearing lower Tg and superior mechanical properties.
KW - Low-temperature property
KW - Molecular weight
KW - Polycarbonate glycol
KW - Polyurethane elastomer
UR - https://www.scopus.com/pages/publications/84922136038
UR - https://www.scopus.com/pages/publications/84922136038#tab=citedBy
U2 - 10.1166/sam.2015.1913
DO - 10.1166/sam.2015.1913
M3 - Article
AN - SCOPUS:84922136038
SN - 1947-2935
VL - 7
SP - 934
EP - 939
JO - Science of Advanced Materials
JF - Science of Advanced Materials
IS - 5
ER -