he structures of the Crystalline 3

4-polyisoprene (3

4-PI) was inveshgated by using WAXD

SAXS and Lane photography in various polymerhahon condihons and elongation ratios. The results found that redudng reaction velodty of the catalyhc system is favourable for crystalline capadty. The polymeric structures depended markedly on content of nitrogen donor of the electric agent. The degree of crystailinity and long period inereased with increasing draw raho

but crystailite she decreased. The polymers used in the work belong to non-homogeneous particle system.The particle radiuses are 3.5-16.4nm.