Chain entanglement in thin freestanding polymer films

Physical Review Letters

Volumn 94, Issue 12, 2005, Pages

  Si, Lun ^a   Massa, Michael V ^a   Dalnoki Veress, Kari ^a   Brown, Hugh R ^b   Jones, Richard A L ^c  

^a MCMASTER UNIVERSITY   (Canada)

^b UNIVERSITY OF WOLLONGONG   (Australia)

^c UNIVERSITY OF SHEFFIELD   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

CHAIN ENTANGLEMENT; GLASSSY FILMS; SHEAR DEFORMATION ZONES (SDZ); THIN FREESTANDING POLYMER FILMS;

APPROXIMATION THEORY; ATOMIC FORCE MICROSCOPY; COMPUTER SIMULATION; GLASS; INTERFACES (MATERIALS); MOLECULAR DYNAMICS; MOLECULAR WEIGHT; MONOMERS; MONTE CARLO METHODS; POLYSTYRENES; SHEAR DEFORMATION; THIN FILMS;

PLASTIC FILMS;

EID: 18144427514     PISSN: 00319007     EISSN: 10797114     Source Type: Journal    
DOI: 10.1103/PhysRevLett.94.127801     Document Type: Article

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17. This is a good approximation since an upper limit of the density of the neck is the density of crystalline PS. Syndiotactic PS has a density that is only a few % higher than amorphous PS.
18. Since the thin film regime is not strictly linear we need to evaluate the slope contrast and crossover by finding the tangent to the curve. Because the curve is nearly linear, the choice of tangent affects the results only slightly (1/H = 1.5 was used).