Aufrechterhaltung des Messbetriebes und Weiterentwicklung der Messstrecke A2 bei HASYLAB zur Untersuchung der Roentgenstreuung an Polymeren

SIGLEAvailable from TIB Hannover: DtF QN1(69,59) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany); Deutsche Forschungsgemeinschaft (DFG), Bonn (Germany)DEGerman

Thermoplastic elastomers. III. Poly(ether-ester-imide)s based on 1,6-diaminohexane, trimellitic anhydride, 1,4-dihydroxybutane and poly(tetramethylene oxide)

An imide dicarboxylic acid was prepared from 1,6-diaminohexane and trimellitic anhydride and esterified with ethanol. This imide monomer was polycondensed with three different poly(tetramethylene oxide) diols (PTMO-650, PTMO-1000 and PTMO-2000) and with an excess of 1,4-dihydroxybutane. When PTMO-1000 was used, and even more when PTMO-2000 was used, a partial macrophase separation occurred at the end of the polycondensation process. The resulting poly(ether-ester-imide)s (PEEIs) were characterized by IR and 1H NMR spectroscopy, by viscosity and DSC measurements. Compared to thermoplastic elastomers based on poly(butylene terephthalate) these PEEIs crystallize slowly. Selected PEEIs were also characterized by dynamic melt rheology, by dynamic mechanical thermoanalysis, by stress–strain and by hysteresis measurements

Thermoplastic elastomers 1. Poly(ether-ester-imide)s based on 1,4-diaminobutane, trimellitic anhydride, 1,4-dihydroxybutane and poly(tetramethylene oxide) diols

Starting from 1,4-diaminobutane and trimellitic anhydride a bisimide dicarboxylic acid was prepd. which was transformed into its di-Et ester. This imide monomer was polycondensed with mixts. of 1,4-dihydroxybutane and poly(tetramethylene oxide) (PTMO) diols having no. av. mol. wts. (Mns) of 650, 1000 or 2000 Da. For each PTMO diol, the wt. fraction of the hard segments was varied from 30 over 40 and 50-60%. For the PTMO diols 1000 and 2000, macrophase sepn. was obsd. during polycondensation. This problem was solved in the case of PTMO-1000 by a PTMO diol of greater polydispersity. The chem. structure of the poly(ether-ester-imide)s, PEEIs, was characterized by IR and 1H NMR spectroscopy. The phase transitions were identified by DSC and DMTA measurements, which revealed that all members of this series were slowly crystg. materials. The mech. properties were detd. by stress-strain and hysteresis measurements. Macrophase sepn. during the polycondensation was reflected in poorer mech. properties. [on SciFinder (R)

Thermoplastic elastomers. II. Poly(ether-ester-imide)s based on 1,4-diaminobutane, trimellitic anhydride, 1,4-dihydroxybutane,and poly(ethylene oxide)s

A series of new poly(ether-ester-imide)s, PEEIs, was prepd. from an imide dicarboxylic acid based on 1,4-diaminobutane and trimellitic anhydride. This imide dicarboxylic acid polycondensed with 1,4-dihydroxybutane formed the hard segments and poly(ethylene oxide), PEO-1000, or mixts. of PEO-1000 and poly(tetramethylene oxide), PTMO-1000, were used as soft segments. Whenever PTMO-1000 was used as comonomer, macrophase sepn. was obsd. at the end of the polycondensation. However, this macrophase sepn. had little influence on the mech. properties. A poly(ether-ester-imide), PEEI, contg. neat PEO-1000 was characterized by dynamic mech. thermoanal., stress-strain and hysteresis measurements, and by melt rheol. The mech. properties were compared with those of an analogous PEEI contg. neat PTMO-1000 and with those of a poly(ether-ester), PEE, based on poly(butylene terephthalate) hard segments and PTMO-1000. [on SciFinder (R)

Thermoplastic elastomers 4. Poly(ether-ester-imide)s derived from trimellitic anhydride, 1,6-diaminohexane, 1,4-dihydroxybutane and poly(ethylene oxide)

Four thermoplastic elastomers having the structure of poly(ether-ester-imide)s, PEEIs, were prepared and characterized. The hard segments were synthesized from 1,4-dihydroxybutane and from an imide dicarboxylic acid based on 1,6-diaminohexane and trimellitic anhydride. Poly(tetramethylene oxide)-1000, poly(ethylene oxide)-1000 or mixtures of both oligoethers served as soft segments. The PEEI based on neat PEO-1000 was also modified by a solid state post-condensation which raised the nrel value by a factor three. All PEEIs were characterized by H NMR spectroscopy, inherent viscosity and DSC measurements, and stress-strain measurements. The PEEIs based on neat PEO-1000 were also characterized by dynamic thermal mechanical analysis, by hysteresis measurements and by melt rheology