SSNMR AND DIELECTRIC STUDY OF VULCANIZED POLYBUTADIENE RUBBER

A. L. RODRIGUEZ CARRAZA; P. SORICHETTI; A. J. MARZOCCA; C. L. MATTEO; G. A. MONTI

Angra Dos Reis

Congreso; AUREMN 2011 (13th NMR Users Meeting); 2011

AUREMN

Polybutadiene rubber, BR, is one of the most popular synthetic rubbers when combined to form blends, due to its excellent mechanical properties. One of the most extended uses of BR is in the tread and sidewalls of tyres where it is blended with other rubbers such as natural rubber NR and styrene butadiene rubber SBR This work continues our researches of the influences of the molecular structure and the cure level in the physical properties of polybutadiene rubber [1, 2]. The cure reaction of two compounds of high- and low-cis BR prepared with the systems TBBS (n-t-butyl-2-benzothiazole sulfenamide)/sulfur was characterized by means of rheometric analysis. The correlation between dielectric properties and cure level was studied by broadband dielectric spectroscopy. The correlation between microstructural changes and cure level was detected by 13C solid state nucelar magnetic resonance (SSNMR) experiments. 1. A.J.Marzocca; A.L. Rodriguez Garraza; P.Sorichetti; H.O.Mosca; Polymer Testing, 2010, 29, 477. 2. A.J.Marzocca; A.L. Rodriguez Garraza; M.A.Mansilla; Polymer Testing 2010, 29, 119.