['Therefore', ',', 'production', 'of', 'anionic', 'polystyrene', '(', 'PS', ')', 'would', 'be', 'of', 'interest', 'if', 'the', 'conditions', 'required', 'to', 'control', 'the', 'polymerization', 'could', 'be', 'adapted', 'to', 'the', 'market', 'and', 'be', 'able', 'to', 'compete', 'economically', 'with', 'industrial', 'radical', 'processes', '.']