Citation: Chun-zhu Yan, Lin Guo, Xiao-li Sun, Shou-ke Yan, Isao Takahashi. TEMPERATURE-DRIVEN SURFACE MORPHOLOGY EVOLUTION OF POLY(3-HYDROXYBUTYRATE) SINGLE LAYER AND POLY(3-HYDROXYBUTYRATE)/POLY(VINYL PHENOL) BILAYER ON Si WAFERS[J]. Chinese Journal of Polymer Science, ;2013, 31(3): 407-418. doi: 10.1007/s10118-013-1240-9 shu

TEMPERATURE-DRIVEN SURFACE MORPHOLOGY EVOLUTION OF POLY(3-HYDROXYBUTYRATE) SINGLE LAYER AND POLY(3-HYDROXYBUTYRATE)/POLY(VINYL PHENOL) BILAYER ON Si WAFERS

Received Date: 6 December 2012
Revised Date: 13 December 2012

Fund Project: This work was financially supported by the National Natural Science Foundation of China (Nos. 21004003, 21274010), and part of the work was also financially supported by the Japan Society for the Promotion of Science (Grant-in Aid for Scientific Research (c) 24560033).

The specular and off-specular X-ray reflectivities were efficiently employed to study the evolution of surface morphology as a function of temperature in a single layer of poly(3-hydroxybutyrate) (PHB) and a bilayer of PHB/poly(vinyl phenol) (PVPh) on Si substrates. The results indicate that the changes of thickness and surface roughness caused by pre-melting of PHB crystals are not obvious for the single layer, whereas the surface roughness of the PHB layer and the intensity of the off-specular X-ray reflectivity for the bilayer exhibit a remarkable non-monotonic change in the temperature range of 100-150℃; the roughness parameter evaluated by the specular X-ray reflectivity reaches its maximum at 120℃. The interaction at the interface between PVPh and PHB certainly contributes to the non-monotonic changes. Such interaction also affects the crystallization and melting behavior of PHB thin film greatly. The crystallization of PHB thin film is inhibited even on the glassy surface of PVPh sublayer. In the melting process, the PHB crystals on PVPh sublayer feature a three-section melting curve separated by a plateau region of 120-140℃.
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