Isotactic polymers

Polymers had been increasingly useful but manufactured out of simpler units, which sometimes with branches in the chain. Isotactic polymers all have just one chain and all sub-components face the same way. Polyethylene was tougher, and higher melting than the old.
 Karl Ziegler and Giulio Natta Germany and Italy 1953 Isotactic polymers

Polymers had been increasingly useful but manufactured out of simpler units, which sometimes with branches in the chain. Isotactic polymers all have just one chain and all sub-components face the same way. Polyethylene was tougher, and higher melting than the old.