Synthesis and characterization of alternating poly(amide urethane)s

• Main Author: Sharma, Bhaskar
• Other Authors: Höcker, Hartwig
• Format: Doctoral or Postdoctoral Thesis
• Language: English
• Published: Publikationsserver der RWTH Aachen University 2004
• Subjects: info:eu-repo/classification/ddc/540; Chemie; Polycondensation; Modification of end groups; Structure-properety relations; Carbonic acid
• Online Access: https://publications.rwth-aachen.de/record/59627; https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-121396%22

This thesis deals with the preparation of alternating poly(amide urethane)s which might be of interest for the manufacture of powder coatings. The synthesis of poly(amide urethane)s was performed in environmentally friendly way without using isocyanates or phosgene. The starting materials for the synthesis were e-caprolactam, e-caprolactone, amino alcohols, diamines and carbonic acid derivatives, i.e. diphenyl carbonate and ethylene carbonate as substitutes for phosgene. A new synthesis was developed where the polycondensation of a-hydroxy-w-O-phenyl urethanes and a-hydroxy-w-O-hydroxy ethyl urethanes plays a key role. It was shown that the polycondensation is influenced by some factors; the use of the catalyst plays an important role. The microstructure of the polymers is different depending on the nature of monomers and the temperature during the polycondensation.