ESTIMATION OF THE LINEAR THERMAL-EXPANSION COEFFICIENT IN FRICTION-DEPOSITED, ORIENTED POLY(TETRAFLUOROETHYLENE) FILMS BY TEMPERATURE-DEPENDENT LATERAL FORCE MICROSCOPY

Authors
FORSTER S LIU GB VANCSO GJ
Citation
S. Forster et al., ESTIMATION OF THE LINEAR THERMAL-EXPANSION COEFFICIENT IN FRICTION-DEPOSITED, ORIENTED POLY(TETRAFLUOROETHYLENE) FILMS BY TEMPERATURE-DEPENDENT LATERAL FORCE MICROSCOPY, Polymer bulletin, 36(4), 1996, pp. 471-476
Citations number
20
Categorie Soggetti
Polymer Sciences
Journal title
Polymer bulletin → ACNP
ISSN journal
01700839
Volume
36
Issue
4
Year of publication
1996
Pages
471 - 476
Database
ISI
SICI code
0170-0839(1996)36:4<471:EOTLTC>2.0.ZU;2-J
Abstract
Preliminary lateral force microscopy (LFM) results are presented which were obtained at different temperatures on thin films of poly(tetrafl uoroethylene) prepared by friction deposition. Chain-chain distances o f rodlike poly(tetrafluoroethylene) macromolecules were determined as a function of temperature from LFM images which exhibit molecular reso lution. The value of the linear thermal expansion coefficient in the c hain-perpendicular direction was estimated to be 3.5 x 10(-3) [1/degre es C] in the temperature range between +10 degrees C and +40 degrees C . This value is higher than the literature data quoted for the tempera ture range between 0 degrees C and 25 degrees C. Possible reasons for this deviation are discussed.