Jessica M. Torres, Christopher M. Stafford, David Uhrig and Bryan D. Vogt Impact of chain architecture (branching) on the thermal and mechanical behavior of polystyrene thin films Journal of Polymer Science Part B: Polymer Physics 50
Branching architecture of polymers is known to significantly affect the thermal and mechanical behavior of thin films. Here, the modulus and glass transition temperature (Tg) of four different architectures (linear, comb, centipede, and four-armed star) of polystyrene thin films are examined as a function of thickness. The elastic modulus for the comb PS is independent of film thickness, whereas the other architectures exhibit a significant decrease in modulus for thin films. These differences are attributed to differences in chain conformation with branching.
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