TY - JOUR
T1 - Synthesis and characterization of random poly(amide-sulfonamide)s
T2 - 3. Copolymers from two diamino monomers
AU - Chan, Wing Hong
AU - Lam-Leung, Suei Yee
AU - Ng, Ching Fai
AU - Ding, Junqi
AU - Xi, Shiping
N1 - Funding Information:
Financial support (RGC/92-93/ 18) from the Research Grant Council of the University and Polytechnic Grant Committee is gratefully acknowledged. Suk-Mei Leung and Wing-Chuen Tam participated in this project in their capacities as final year undergraduate research students.
PY - 1995
Y1 - 1995
N2 - Four new series of poly(amide-sulfonamide)s (PASAs), having different ratios of two different diamino monomer moieties in the polymer backbone, were obtained by low-temperature solution polycondensation of the respective diamines with terephthaloyl chloride/isophthaloyl chloride. With the exception of the most highly symmetric polymer series, all of the other polymers were readily soluble in aprotic polar solvents such as N,N-dimethylacetamide, dimethylformamide and dimethyl sulfoxide. The three series of soluble polymers had intrinsic viscosities in the ranges 0.51-0.72, 0.33-0.49 and 0.70-0.92 dl g-1. Differential scanning calorimetry showed these PASAs to have glass transition temperatures greater than 250°C. Thermogravimetric analysis of the polymers showed moderate thermal stabilities, with 10% weight losses being recorded over the range 382-408°C. X-ray diffraction studies indicated that some of these polymers possess a certain degree of crystallinity.
AB - Four new series of poly(amide-sulfonamide)s (PASAs), having different ratios of two different diamino monomer moieties in the polymer backbone, were obtained by low-temperature solution polycondensation of the respective diamines with terephthaloyl chloride/isophthaloyl chloride. With the exception of the most highly symmetric polymer series, all of the other polymers were readily soluble in aprotic polar solvents such as N,N-dimethylacetamide, dimethylformamide and dimethyl sulfoxide. The three series of soluble polymers had intrinsic viscosities in the ranges 0.51-0.72, 0.33-0.49 and 0.70-0.92 dl g-1. Differential scanning calorimetry showed these PASAs to have glass transition temperatures greater than 250°C. Thermogravimetric analysis of the polymers showed moderate thermal stabilities, with 10% weight losses being recorded over the range 382-408°C. X-ray diffraction studies indicated that some of these polymers possess a certain degree of crystallinity.
KW - membrane materials, random polymers
KW - poly(amide-sulfonamide)s
UR - http://www.scopus.com/inward/record.url?scp=0029406698&partnerID=8YFLogxK
U2 - 10.1016/0032-3861(95)96860-B
DO - 10.1016/0032-3861(95)96860-B
M3 - Journal article
AN - SCOPUS:0029406698
SN - 0032-3861
VL - 36
SP - 4503
EP - 4508
JO - Polymer
JF - Polymer
IS - 23
ER -