Sulfonated syndiotactic polystyrene

There is a strong electrostatic interaction between the ionic groups of sulfonated syndiotactic polystyrene ionomer. This strong interaction prevents crystallization from the melt. 

Other applications of FTIR in microstructural analysis of homopolymers include 1,4-diazophenylene - bridged Cu-phthalocyanine [63], isobornyl methacrylate [64], polypropylene [65, 66], polyaniline [67, 68], polycaprolactone [69], viscose fibres [70], Kevlar [71], polystyrene sulfonic acid [66, 72], syndiotactic polystyrene [73], isotactic polypropylene [66,74,75], polyurethane [76], PMMA [75, 77], poljmrethane ether [78], PE [79-80], fluorinated acrylates [81], rigid PU [82], N-(2-biphenyl)4-(2 phenylethynyljphthalamide [83], polyacrylic acid [84], polysodium styrene sulfonate [84], and polyacrylic acid [85]. 

Blends of PPO with PS containing sulfonated and carboxylated groups have been reported in various studies [394-396]. The miscibility of sulfonated PS with PPO, sulfonated PPO with PS and blends of the sulfonated polymers was reported by Hseih and Peilfer [394]. Miscibility was maintained with sulfonation levels up to 2-4mol% for PS with sulfonated PPO and sulfonated PS with PPO. When both polymers were sulfonated, phase separation occurred at higher levels (> 10mol% sulfonation). The miscibility can be influenced by counter ion, as noted in a comparison of a Zn + neutralized sulfonic acid modified PS, which exhibited a larger miscibility window with PPO than the Na neutralized coimterpart [396]. Syndiotactic polystyrene was noted to be miscible over the entire composition range in amorphous blends with PPO, where the Tg versus composition followed the Fox equation predictions [397]. Isotactic polystyrene miscibility with PPO has also been observed, with crystallization and orientation data reported on the blend [398]. 

Borriello, A., Agoretti, R, Ambrosio, L., Fasano, G, PeUegrino, M., Venditto, V., Guerra, G. Syndiotactic polystyrene films with sulfonated amorphous phase and nanoporous crystahine phase. Chem. Mater., 21,3191-3196 (2009). 

The effect of adding sulfonated syndiotactic polystyrene ionomer 34... 

The preparation and characterization of novel syndiotactic polystyrene/ 44 polyamide-6/sulfonated syndiotactic polystyrene/dodecylamine-modified montmorillonite (SPS/PA6/SSPS/MTA) nanocomposite by a melt-intercalation-blend process... 

Li, H., Shen, Z., Wang, I, Zhu, E, Lin, Shang an. Studies of syndiotactic polysty-rene/polyamide-6/sulfonated syndiotactic polystyrene/montmoriUonite nanocomposites. Gongneng Gaofenzi Xuebao, 15(3), 261-265 (2002). 

Orler, E. B., Moore, R. B. Influence of ionic interactions on the crystallization of lightly sulfonated syndiotactic polystyrene ionomers. Macromolecules, 27, 4774-4780 (1994). 

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