Abstract
The temperature dependence of the ordered structures appeared in a gel of atactic polystyrene in carbon disulfide has been studied using wide-angle neutron diffraction. All data are taken over a wide temperature range from 200 to 300 K under an off-stoichiometric condition, i.e., at the polymer concentration of 0.252 g/cm 3. The gel far below the gelation temperature contains highly ordered structures, while the gel near the gelation temperature contains less distinct ordered structure. Based on these results, the molecular mechanism of the sol—gel transion of the present system is discussed.
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