Abstract
Fourier transform infrared spectra were measured for syndiotactic polystyrene (SPS) and its miscible blends with poly(2,6-dimethyl-1,4-phenylene ether) (PPE) of 3, 7, and 10 wt % over a temperature range of 303-493 K at an increment of 10 K. Crystallization of SPS from the glass state to the planar all-<i>trans</i> form occurred in the temperature range of 423-453 K and was delayed by about 10 K in the SPS/PPE blends, as evidenced by the temperature-dependent absorbance changes in bands at 2846.7, 1374.0, 1333.5, 1222.7, 1091.3, 964.1, 939.2, and 839.8 cm<sup>-1</sup>. A downward shift of the CH<sub>2</sub> symmetric stretching band during the heat-induced crystallization was observed. A kind of "prestructural change" from 383 to 423 K was identified for pure SPS by the temperature-dependent changes in the combination modes of aryl CH out-of-plane deformation vibrations. It was diminished in the SPS/PPE blends with the increase in the PPE content, and disappeared in the blends of 10 wt % PPE. This phenomenon was explained by the favorable dispersive interaction between the phenyl rings of SPS and PPE, which was responsible for the blend compatibility.
PDF Article
More Like This
Study of a poly-1,6-dicarbazolyl-2,4-hexadiyne nanocrystal film by the fifth-order electroabsorption spectroscopy
Ke Yang, Jin-An He, Jayant Kumar, Lynne A. Samuelson, Toshiyuki Oshikiri, Hideyuki Katagi, Hitoshi Kasai, Shuji Okada, Hidetoshi Oikawa, Hachiro Nakanishi, and Sukant K. Tripathy
J. Opt. Soc. Am. B 22(3) 623-632 (2005)
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription