ISSN:
1572-8935
Keywords:
Phenylphosphonate-containing PU elastomer
;
Relaxation transition
;
TDI-based polyurethane elastomers
;
Tglobal transition
;
TSC/RMA
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Abstract TSC/RMA study on the thermal behavior of the phenylphosphonate-containing TDI-based polyurethane elastomers, reveals that the bulky phenylphosphonate moiety, which was sandwiched in the middle of the PPG soft chain, untightens the matrix and facilitates the cooperative motion at Tg transition, as indicated by the lowering of the Tg temperature. An additional relaxation transition, the Tglobal transition, in associated with the hard TDI-MOCA segment was detected and evaluated. Thermal windowing technique in RMA reveals the coexistence of two amorphous regions with one dominated by the urethanic segment and the other is the global/mechanical property associated with the TDI-MOCA hard segment. DSC thermogram showed only one Tg transition without detection of the crystalline domain, implicating that domain was not formed by the hard segment; The detection by TSC/RMA on the relaxation transition of the hard segment existed in the amorphous region may be significant and provide a tool to study the thermal behavior of the hard segment in the polyurethane matrix.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s10965-006-0066-3
