The discovery of heterogeneous stereospecific catalyst systems by Ziegler and Natta 1953 heralded the birth of a wide variety of new polymers such as highly crystalline (isotactic) polypropylene.
Reference:
Trollip, N. 1985. SAWTRI Special publication: A review of the effect of impurities on the photostability of polypropylene. http://hdl.handle.net/10204/13114 .
Trollip, N. (1985). SAWTRI Special publication: A review of the effect of impurities on the photostability of polypropylene Retrieved from http://hdl.handle.net/10204/13114
Trollip, NG SAWTRI Special publication: A review of the effect of impurities on the photostability of polypropylene. 1985. http://hdl.handle.net/10204/13114
Trollip N. SAWTRI Special publication: A review of the effect of impurities on the photostability of polypropylene. 1985 [cited yyyy month dd]. Available from: http://hdl.handle.net/10204/13114