TY - JOUR
T1 - Investigation on novel thermoplastic poly(urethane-thiourea-imide)s with enhanced chemical and heat resistance
AU - Kausar, Ayesha
AU - Zulfiqar, Sonia
AU - Yavuz, Cafer T.
AU - Sarwar, Muhammad Ilyas
N1 - Generated from Scopus record by KAUST IRTS on 2021-03-16
PY - 2011/7/1
Y1 - 2011/7/1
N2 - A new generation of segmented thermoplastic poly(urethane-thiourea-imide)s (PUTIs) was synthesized via reaction of polyethylene glycol and thiourea-based prepolymer with dianhydride as chain extenders. NCO-terminated prepolymer was synthesized from a new diisocyanate, 3-(3-((4-isocyanatophenyl)carbamoyl) thioureido)phenyl-4-isocyanatophenylcarbamate (IPCT), as a hard segment and PEG forming soft segment. The starting materials and polymers were characterized by conventional methods and physical properties such as solubility, solution viscosity, molecular weight, thermal stability and thermal behavior were studied. PUTIs showed partially crystalline structures. Weight average molecular weights of PUTIs (GPC measurements) were in the range of 1,68,694-1,97,035. Moreover, thermogravimetric analysis indicated that poly(urethane-thiourea- imide)s were fairly stable above 500 °C having T10 of 521-543 °C. Investigation of the results authenticated the approach of introducing thiourea (using IPCT) and imide structure in polyurethanes for the improvement of thermal stability. In comparison to typical polyurethanes, these polymers exhibited better heat resistance, chemical resistance as well as processability. © 2011 Elsevier Ltd. All rights reserved.
AB - A new generation of segmented thermoplastic poly(urethane-thiourea-imide)s (PUTIs) was synthesized via reaction of polyethylene glycol and thiourea-based prepolymer with dianhydride as chain extenders. NCO-terminated prepolymer was synthesized from a new diisocyanate, 3-(3-((4-isocyanatophenyl)carbamoyl) thioureido)phenyl-4-isocyanatophenylcarbamate (IPCT), as a hard segment and PEG forming soft segment. The starting materials and polymers were characterized by conventional methods and physical properties such as solubility, solution viscosity, molecular weight, thermal stability and thermal behavior were studied. PUTIs showed partially crystalline structures. Weight average molecular weights of PUTIs (GPC measurements) were in the range of 1,68,694-1,97,035. Moreover, thermogravimetric analysis indicated that poly(urethane-thiourea- imide)s were fairly stable above 500 °C having T10 of 521-543 °C. Investigation of the results authenticated the approach of introducing thiourea (using IPCT) and imide structure in polyurethanes for the improvement of thermal stability. In comparison to typical polyurethanes, these polymers exhibited better heat resistance, chemical resistance as well as processability. © 2011 Elsevier Ltd. All rights reserved.
UR - https://linkinghub.elsevier.com/retrieve/pii/S0141391011001376
UR - http://www.scopus.com/inward/record.url?scp=79957861466&partnerID=8YFLogxK
U2 - 10.1016/j.polymdegradstab.2011.03.017
DO - 10.1016/j.polymdegradstab.2011.03.017
M3 - Article
SN - 0141-3910
VL - 96
SP - 1333
EP - 1341
JO - Polymer Degradation and Stability
JF - Polymer Degradation and Stability
IS - 7
ER -