Li-guo Chai, Lin Li, Qi Liao, Shou-ke Yan. AFM OBSERVATIONS OF MELTING BEHAVIOR OF POLY(ETHYLENE OXIDE) SINGLE CRYSTALS ON IPB-1 SUBSTRATES WITH DIFFERENT LAMELLAR ORIENTATION. [J]. Acta Polymerica Sinica (11):1342-1348(2012)
DOI:
Li-guo Chai, Lin Li, Qi Liao, Shou-ke Yan. AFM OBSERVATIONS OF MELTING BEHAVIOR OF POLY(ETHYLENE OXIDE) SINGLE CRYSTALS ON IPB-1 SUBSTRATES WITH DIFFERENT LAMELLAR ORIENTATION. [J]. Acta Polymerica Sinica (11):1342-1348(2012) DOI: 10.3724/SP.J.1105.2012.12073.
AFM OBSERVATIONS OF MELTING BEHAVIOR OF POLY(ETHYLENE OXIDE) SINGLE CRYSTALS ON IPB-1 SUBSTRATES WITH DIFFERENT LAMELLAR ORIENTATION
Regular single crystals of polyethylene oxide were obtained through solution crystallization.To study their melting behavior on different iPB-1 substrates
iPB-1 thin films with different lamellar orientation have been prepared by crystallizing from melt at different temperatures.AFM observation shows that crystallizing from melt in air at room temperature the iPB-1 film exhibits an edge-on lamellar structure with molecular chains in film plane.On the other hand
crystallizing from melt at 100℃ isothermally
the iPB-1 film has a flat-on lamellar orientation with molecular chains perpendicular to the film plane.The melting of PEO single crystals on these different iPB-1 surfaces was then monitored by in situ AFM observation.It was found that the PEO single crystals on edge-on and flat-on iPB-1 crystalline film surfaces melted approximately at same temperature
which was confirmed by theoretical calculation.However
the dewetting behavior of the molten PEO single crystals depends on the lamellar orientation of the iPB-1 evidently.The PEO melt on edge-on iPB-1 film surface shows somewhat a better wetting ability than on flat-on iPB-1 crystalline film surface.
关键词
原子力显微镜iPB-1PEO熔融行为
Keywords
AFMIsotactic polybutene-1Poly(ethylene oxide) single crystalMelting