The relationship between glass transition temperature (Tg) and lateral force of amorphous polymer blends composed of components having Tg’s lower and higher than room temperature (295 K) was studied on the basis of lateral force microscopy (LFM). Although the lateral force for the homopolymer is deeply related to its surface viscoelastic property or Tg, the LFM results revealed that the lateral force dependence on the scan rate of the miscible polymer blends, [poly(methylacrylate)/poly(vinylacetate)] and [polystyrene/poly(vinylmethylether)], was similar with that of the component whose lateral force behavior shows the dependence on the scan rate, regardless of their Tg. This result suggests that the lateral force of miscible polymer blend reflects the sum of each component contribution, depending on the surface structure of the blend. Therefore, it was concluded that the information about surface structure can be obtained from the measured lateral force behavior of a miscible polymer blend.
Посилання на статтю:
Study on surface structure of amorphous polymer blends on the basis of lateral force microscopy / Won-Ki Lee // Polymer. – 1999. – N 40. – P. 5631–5636.