Synthesis Of New Amine-terminating Agents And Its Application In The SSBR

With the rapid development of the automobile industry, people’s demand for "green tire" of energy saving, environmental protection and safety is more and more increasing. Through modificating of end groups of SSBR and enhancing the interaction between filler and polymer, which can reduce hysteresis loss of the tread and rolling resistance of the tire, so as to achieve the purpose of energy saving and environmental protection. The most commonly used methods for the preparation of end functionalized polymers is reacting between the functionalized electrophiles and reactive polymer chain. It has been an important research to develop the new terminators having good terminal modification effect at home and abroad. In this paper, the two novel kinds of terminator containing amido and alkoxysilyl groups were synthesized, and then end functionalized polymers weres prepared via anionic in-situ polymerization by the terminating reaction.First,two kind of amine terminators:N-b-enzylidene-3-(triethoxysilyl)-1-propa-neamine (TEOS) and N-(N,N-dimethyl-b-en-zylidene)-3-(triethoxysilyl)-1-propane-amine (DTEOS) were designed and synthesized, which molecular structure are characterized by FT-IR spectrum and NMR spectrum. Second, the model polymers-polystyrene (PS) and polybutadiene (PB) were synthesized by active anion technology, cyclohexane as solvent and n-BuLi as initiator, then TEOS was applied in the PS and PB. By studying the effect of the type and amount of the modifier and the activity of the anionic active species on the capping reaction, the reaction mechanism of TEOS and the model polymers was obtained.What’s more, SSBR was terminated by TEOS and DTEOS, THF as the modifier. The effect of DPE on the end capping reaction was studied. The functionalized SSBR-DPE-TEOS and SSBR-DPE-DTEOS macrostructures characterized by NMR and their molecular weight and molecular weight distribution(Dp) were examined by GPC.Finally, the performance of SSBR, SSBR-DPE-TEOS and SSBR-DPE-DTEOS were tested. The results showed that SSBR-DPE-TEOS and SSBR-DPE-DTEOS have more excellent mechanical properties, high wet skid resistance, low rolling resistance and compression temperature rise, compared with the SSBR.The other properties of SSBR-DPE-TEOS is better than SSSBR-DPE-DTEOS’s, excepting worse resistance to heat. This study provides theoretical basis for the further application of SSBR-DPE-TEOS and SSBR-DPE-DTEOS in the industrial production.