Radiation effects and re-crystallization mechanism of syndiotactic polystyrene with β′-crystalline form

Isothermal crystallization kinetics of syndiotactic polystyrene exposed to gamma radiation in vacuum

“…27 However, this is different from that for nonirradiated sPS, where n was reported to be equal to 3 for all T c values 34 and to be constant for 122°C # T c #132°C and 244°C # T c # 252°C. 37 On the other hand, k decreased with increasing crystallization temperature and gamma-ray dose for both vacuum and air irradiated sPS. Wang et al 37 also observed that k decreased with increasing gamma ray dose.…”

“…37 On the other hand, k decreased with increasing crystallization temperature and gamma-ray dose for both vacuum and air irradiated sPS. Wang et al 37 also observed that k decreased with increasing gamma ray dose. Ting et al 27 found that the glass transition temperature of air irradiated sPS increases with gamma ray dose, implying that chain crosslinks increase with gamma ray dose.…”

“…37 The dashed and solid lines of Z versus 1/(T À T ∞ ) for the b and b9 crystalline forms, respectively, in sPS irradiated in vacuum at different gamma doses are shown in Fig. 5.…”

Carbon nanocapsules-reinforced syndiotactic polystyrene nanocomposites: Crystallization and morphological features

“…10a) did not result from the polymorphism of sPS because only b-form is detected by FTIR and WAXD. On the basis of morphological observations, lamellar insertion model was verified along with the re-crystallization model to account for the double-melting behavior of neat b 0 -form sPS [47]. In other words, the position of the T mh is dependent upon the average thickness of the un-melted lamellae as well as the thickened ones relevant with the re-crystallization process.…”