Kinetics of surface crystallization in thin films of poly(ethylene terephthalate)

被引:49
作者
Jukes, PC
Das, A
Durell, M
Trolley, D
Higgins, AM
Geoghegan, M
Macdonald, JE
Jones, RAL
Brown, S
Thompson, P
机构
[1] Cardiff Univ, Dept Phys & Astron, Cardiff CF2 3YB, S Glam, Wales
[2] ESRF, XMaS Beamline, F-38043 Grenoble, France
[3] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England
关键词
D O I
10.1021/ma0490606
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
In-situ grazing incidence X-ray diffraction has been used to investigate the kinetics of crystallization at the surface of thin films of poly(ethylene terephthalate) (PET). By varying the angle of incidence of the X-ray beam around the critical angle of the film, the penetration depth can be tuned to allow a direct comparison of molecular ordering in the surface and bulk of the film. The results show that ordering occurs significantly faster at the surface in the temperature range 90-100 degrees C (close to the bulk glass transition temperature of 75 degrees C). The (0 (1) over bar1) and (010) peaks narrow more rapidly and achieve a lower width, indicating that the crystallization progresses more rapidly in these crystallographic directions. This enhanced ordering is attributed to a combination of surface energy effects, which promote localized packing, and to an enhanced segmental mobility near the free surface.
引用
收藏
页码:2315 / 2320
页数:6
相关论文
共 25 条
[1]   ON THE INFLUENCE OF HARD WALLS ON STRUCTURAL-PROPERTIES IN POLYMER GLASS SIMULATION [J].
BASCHNAGEL, J ;
BINDER, K .
MACROMOLECULES, 1995, 28 (20) :6808-6818
[2]   Transesterification in mixtures of poly(ethylene terephthalate) and poly(ethylene naphthalene-2,6-dicarboxylate): An NMR study of kinetics and end group effects [J].
Collins, S ;
Kenwright, AM ;
Pawson, C ;
Peace, SK ;
Richards, RW ;
MacDonald, WA ;
Mills, P .
MACROMOLECULES, 2000, 33 (08) :2974-2980
[3]   Crystal growth rate in ultrathin films of poly(ethylene oxide) [J].
Dalnoki-Veress, K ;
Forrest, JA ;
Massa, MV ;
Pratt, A ;
Williams, A .
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 2001, 39 (21) :2615-2621
[4]  
DAUBENY RD, 1954, PROC R SOC LON SER-A, V226, P531
[5]   The role of surface-induced ordering in the crystallisation of PET films [J].
Durell, M ;
Macdonald, JE ;
Trolley, D ;
Wehrum, A ;
Jukes, PC ;
Jones, RAL ;
Walker, CJ ;
Brown, S .
EUROPHYSICS LETTERS, 2002, 58 (06) :844-850
[6]   GRAZING-INCIDENCE X-RAY-SCATTERING STUDIES OF THIN-FILMS OF AN AROMATIC POLYIMIDE [J].
FACTOR, BJ ;
RUSSELL, TP ;
TONEY, MF .
MACROMOLECULES, 1993, 26 (11) :2847-2859
[7]   SURFACE-INDUCED ORDERING OF AN AROMATIC POLYIMIDE [J].
FACTOR, BJ ;
RUSSELL, TP ;
TONEY, MF .
PHYSICAL REVIEW LETTERS, 1991, 66 (09) :1181-1184
[8]   The glass transition in thin polymer films [J].
Forrest, JA ;
Dalnoki-Veress, K .
ADVANCES IN COLLOID AND INTERFACE SCIENCE, 2001, 94 (1-3) :167-196
[9]  
Forrest JA, 2000, POLYMER SURFACES, INTERFACES AND THIN FILMS, P251
[10]   Wetting at polymer surfaces and interfaces [J].
Geoghegan, M ;
Krausch, G .
PROGRESS IN POLYMER SCIENCE, 2003, 28 (02) :261-302