Abstract
Abstract A study has been made into the initial values of viscoelasticity parameters that characterized the binary polymer systems containing 1,4-polybutadienes, produced by anionic polymerization and having a relatively narrow molecular-mass distribution (M w/M n ≤ 1.1–1.2). These binary systems contained polymers with M/M c > 1. On the one hand, the latter ratio approached 2, on the other, they contained high-molecular components with M/M c exceeding 300. The binary systems contained the high-molecular components in the amount of 0.1 to 20% which permitted determining the intrinsic characteristic values of viscosity [η] and elastic coefficient [A O G]. It has been found that from the above-mentioned sample of PB two types of the systems can be formed: 1) solutions of a high-molecular-mass polymer in a low-molecular one; 2) blends of polymer with well developed entanglement network. In the first case the intrinsic values of the viscosity and the coefficient of elasticity are presented in the following fo...
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