AFM study of crystallization and melting of a poly(ethylene oxide)   diblock copolymer containing a tablet-like block of poly   {2,5-bis[(4-methoxyphenyl)oxycarbonyl] styrene in ultrathin films

doi:10.1016/j.polymer.2005.12.021

CORC > 北京大学 > 化学与分子工程学院

	AFM study of crystallization and melting of a poly(ethylene oxide) diblock copolymer containing a tablet-like block of poly {2,5-bis[(4-methoxyphenyl)oxycarbonyl] styrene in ultrathin films
	Huang, Y ; Liu, XB ; Zhang, HL ; Zhu, DS ; Sun, YJ ; Yan, SK ; Wang, J ; Chen, XF ; Wan, XH ; Chen, EQ ; Zhou, QF
刊名	polymer
	2006
关键词	crystallization PEO diblock copolymer ultrathin film GROWTH-RATE OXIDIZED SILICON PHASE STRUCTURES SINGLE-CRYSTALS ETHYLENE-OXIDE THIN-FILMS MORPHOLOGY DECORATION KINETICS SURFACE
DOI	10.1016/j.polymer.2005.12.021
英文摘要	Crystallization and melting of a poly(ethylene oxide) (PEO) diblock copolymer containing a tablet-like block of poly {2,5-bis[(4-methoxyphenyl)oxycarbonyl] styrene} (PMPCS) in ultrathin films have been studied using atomic force microscopy (AFM) coupled with a hot stage. The PEO and PMPCS block possess the number-average molecular weights (M-n) of 5300 and 2 100 g/mol, respectively. The ultrathin films on the mica and glow-discharged carbon surfaces were obtained by static dilute solution casting at room temperature. Isothermal melt crystallization from ultrathin films always leads to flat-on lamellae. Selective area electron diffraction (SAED) experiments have demonstrated that the PEO blocks crystallize with a monoclinic structure identical to that of homo-PEO and the chain direction is perpendicular to the substrate. At T-c < 44 degrees C, the monolayer crystals are dendrites. At T-c > 48 degrees C, square-shaped crystals are formed with the (100) and (020) planes as the crystal edges. At 44 degrees C <= T-c <= 48 degrees C, an intermediate monolayer morphology is observed. The monolayer thickness increases monotonically with increasing T-c. At the same T-c, the monolayer lamellae with the top and bottom amorphous layers contacting with the atmosphere and the substrate possess a significantly larger overall thickness than the long period of the crystals in bulk. For the spiral terraces induced by screw dislocation, the thickness of each terrace is close to that of the monolayer formed at the same T, and their melting is mainly determined by the terrace thickness. (c) 2005 Elsevier Ltd. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000235522900033&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Polymer Science; SCI(E); EI; 19; ARTICLE; 4; 1217-1225; 47
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/252312]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Huang, Y,Liu, XB,Zhang, HL,et al. AFM study of crystallization and melting of a poly(ethylene oxide) diblock copolymer containing a tablet-like block of poly {2,5-bis[(4-methoxyphenyl)oxycarbonyl] styrene in ultrathin films[J]. polymer,2006.
APA	Huang, Y.,Liu, XB.,Zhang, HL.,Zhu, DS.,Sun, YJ.,...&Zhou, QF.(2006).AFM study of crystallization and melting of a poly(ethylene oxide) diblock copolymer containing a tablet-like block of poly {2,5-bis[(4-methoxyphenyl)oxycarbonyl] styrene in ultrathin films.polymer.
MLA	Huang, Y,et al."AFM study of crystallization and melting of a poly(ethylene oxide) diblock copolymer containing a tablet-like block of poly {2,5-bis[(4-methoxyphenyl)oxycarbonyl] styrene in ultrathin films".polymer (2006).