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3 protocols using 2 6 di tert butyl p cresol

1

Synthesis of Styrene-Butadiene Polymers

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1,3-Butadiene (Bd, 1.9 M in hexane) in a ChemSeal bottle was purchased from Energy China and used as received. Styrene (St, 99%) was obtained from Macklin China. The Styrene was purified by distillation over calcium hydride with dilution to 2 M in hexane. 2,3-Butanedione (98%), benzil (98%), 2,6-dimethylaniline (99%), 2,6-diisopropylaniline (96%) and diisobutylaluminium hydride (Al(i-Bu)3, 1 M in n-hexane) were obtained from Energy China. Boron trifluoride etherate (B, 98%), trifluoroacetic acid (TFA, 99%), triphenyl phosphine (PPh3, 97%) and 2,6-di-tert-butyl-p-cresol (Antiager 264, 97%) were purchased from Macklin China and used as received. Nickel (II) naphthenate (Ni, 5 wt %) was supplied by Meryer China and diluted to 0.025 M with cyclohexane. Toluene, cyclohexane (analytically pure reagent (AR)), hexane (AR), methanol (AR), ethanol (AR) and butanone were purchased from Sinopharm Chemical Reagent Co., Ltd. and used as received.
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2

Living Anionic Polymerization of Dienes and Styrene

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Isoprene (Ip, 99%) and styrene (St, 99%) were purchased from Macklin China, and diluted to 2 M in cyclohexane after vacuum distillation with CaH2. 1,3-Butadiene (Bd, 1.9 M in hexane) was obtained from Energy China and used as received. Neodymium 2-ethylhexyl hydrogen-2-ethylhexylphosphonate solution (Nd(P507)3, 0.04 M in n-hexane) was provided by Foshan Shunde Change Material Co., Ltd. Diisobutylaluminum hydride (Al(i-Bu)3, 1 M in n-hexane), triphenyl phosphine (PPh3, 97%) and 2,6-di-tert-butyl-p-cresol (Antiager 264, 97%) were purchased from Macklin China and used as received. Cyclohexane was distilled with CaH2 and stored on 4 Å molecular sieves for one week before used. Chloroform (99%), n-hexane (98%), ethanol (99.5%) and butanone (99%) were used without further purification.
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3

Synthesis of Styrene-Butadiene Polymers

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1,3-Butadiene (Bd, 1.9 M in hexane) in a ChemSeal bottle was purchased from Energy China and used as received. Styrene (St, 99%) was obtained from Macklin China. The Styrene was purified by distillation over calcium hydride with dilution to 2 M in hexane. 2,3-Butanedione (98%), benzil (98%), 2,6-dimethylaniline (99%), 2,6-diisopropylaniline (96%) and diisobutylaluminium hydride (Al(i-Bu)3, 1 M in n-hexane) were obtained from Energy China. Boron trifluoride etherate (B, 98%), trifluoroacetic acid (TFA, 99%), triphenyl phosphine (PPh3, 97%) and 2,6-di-tert-butyl-p-cresol (Antiager 264, 97%) were purchased from Macklin China and used as received. Nickel (II) naphthenate (Ni, 5 wt %) was supplied by Meryer China and diluted to 0.025 M with cyclohexane. Toluene, cyclohexane (analytically pure reagent (AR)), hexane (AR), methanol (AR), ethanol (AR) and butanone were purchased from Sinopharm Chemical Reagent Co., Ltd. and used as received.
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