The characterization of styrene–β‐pinene polymers

Styrene was polymerized with β‐pinene at 30°C and −50°C in methylene dichloride and in m ‐xylene solvents. The styrene‐to‐terpene ratio on pyrolysis suggests that the polymers made at 30°C are copolymers, whereas most of the polymers made at −50°C are not copolymers. On the other hand, ethylene, ethane, and propylene analysis suggests that more of the polymers made at −50°C are copolymers.