LIN Weixin, ZHANG Lili, ZHANG Huiping, CHEN Qun. INVESTIGATION ON THE MORPHOLOGY AND MOLECULAR MOTIONS OF THE in-situ STRETCHED POLY(ETHER-ESTER) BY SOLID-STATE HIGH-RESOLUTION 13C-NMR SPECTROSCOPY[J]. Acta Polymerica Sinica, 2005,(3):432-436.
LIN Weixin, ZHANG Lili, ZHANG Huiping, CHEN Qun. INVESTIGATION ON THE MORPHOLOGY AND MOLECULAR MOTIONS OF THE in-situ STRETCHED POLY(ETHER-ESTER) BY SOLID-STATE HIGH-RESOLUTION 13C-NMR SPECTROSCOPY[J]. Acta Polymerica Sinica, 2005,(3):432-436.DOI:
The morphollgy and molecular motion of in situ stretched poly (ether-ester) samples were studied by high-resolution solid-state 13C-NMR techniques Stretch-induced crystallization of the soft segment
i.e.ploy-(tetramethylene oxide)(PTMO)
was observed at a draw ratio of 2.0.The degree of erystallinity of PTMO and the lamellar thickness of the crystallites were found to increase with increasing of draw ratio.The molecular motion at high frequency of the amorphous PTMO was found to be almost independent on the draw ratio.It was demonstrated that the stretch-induced crystallization mainly happens in the“pure”PTMO region.1H spin diffusion experiment was carried out on the sample with the draw ratio of 4.0.The thickness of the interfacial region between the amorphous and crystalline PTMO of the sample was estimated to be 1.1 nm
while that between the amorphous PTMO and the erystalline hard domain to be 3.1 nm.