Phospholipids Associated with NR Molecules Inducing Long-Chain Branching Part II

摘要

Natural rubber (NR) from Hevea brasiliensis, is composed of c/s-l,4-polyisoprene and small amount of non-rubber components, such as proteins, lipids, sugars, etc. Even though polyisoprene (IR), prepared with a Ziegler catalyst in 1954, containshigherthan 98% cis-1,4 configuration, NR shows the su-perior mechanical properties such as tack and green strength in unvulcanized states [1,2] and tear strength and tensile strength in vulcanized states [3,4]. Proteins and lipids are the non-rubber components which have been presumed to bring aboutthe outstand-ing of characteristic properties in NR.