Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5190043 | Polymer | 2006 | 7 Pages |
Abstract
The correlation between near-surface morphology and tack behavior of poly(styrene-b-butadiene-b-styrene) triblock copolymer (SBS)/rosin ester films was investigated using probe tack tests, transmission electron microscopy and small-angle X-ray scattering. The SBS/rosin films with rosin composition between 10 and 20Â wt% rosin, prepared by slow evaporation of toluene during solvent casting, exhibited uniform near-surface morphology of lamellae oriented parallel to the surface. However, due to the limited solubility of rosin in the PS domains, the rosin started to phase-separate from the PS domains at 15Â wt%, and formed fully separated micron-sized domains above 20Â wt% rosin. The probe tack force of the SBS/rosin films increased steadily when the near-surface domain orientation changed from perpendicular cylinder to parallel lamellae on addition of rosin. Specifically, for a given lamellar morphology and surface orientation, macrophase separation of rosin plays a critical role in determining the tack properties of SBS/rosin films.
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Hoichang Yang, Unnyoung Sa, Minjeong Kang, Hyeon Soo Ryu, Chang Yeol Ryu, Kilwon Cho,