Dynamic-Mechanical Properties of Tin-Coupled SBRs

Abstract

The interaction between rubber and carbon black in compounds for road tire treads has been analyzed by using mechanical and dynamical measurements in three cured compounds based on SBRs. The rubbers were prepared in solution by anionic polymerization, and coupled with tin compounds in which the carbon-tin bond at the end of the chain may correspond to styryl or butadienyl terminations. The interaction parameter, defined by the ratio of mechanical and dynamic terms, has been used for the first time for the evaluation of the compounds. The SBRs with tin-butadienyl bonds exhibit an improved interaction with the filler, with increasing tin content.

Organometallic Polymers of Germanium, Tin and Lead

“…In addition, energy-dispersive Xray analysis (EDX) was performed on polymer-supported organotin chlorides in order to determine the tin-to-chloride ratio. Mainly gel permeation chromatography (GPC) was used to determine the average molecular weights of soluble polymer-supported organotin compounds 172,177,182,185,186,201,202 . An alternative method to estimate the average molecular weight of polymers is the measurement of intrinsic viscosities 176 .…”

Chemical modification of a random copolymer of styrene, isoprene, and butadiene, prepared by anionic polymerization in solution

“…Analysis of the literature shows [8][9][10] that the main branching agents belong to the following groups: triand tetrahalides of Group IV elements of the periodic table; polyfunctional organic compounds of silicon and tin (silanes, siloxanes, stannanes); vinyl derivatives of linear structure and those containing the vinyl group in conjugation with an aromatic system. Halides and organic compounds of silicon and tin form, apparently, the largest and the most widely used group of branching agents for preparing star-shaped branched rubbers.…”

Improvement of polymer blend properties by changing sequence of mixing

“…More recently, an interaction parameter, defined 21 by s/Z, has been proposed for the measurement of the interactions between carbon black and rubber. The s term is the slope of the stress-strain curve in linear regions and at typical extension ratios varying from 1 to 3.…”