Preparation method of high trans-1,4-isoprene-butadiene copolymer
A technology of isoprene and copolymer, applied in the field of polymer synthesis, can solve the problems of discharge, difficult to dissipate heat, difficult materials, etc.
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Embodiment 1
[0032] Clean the 30mL polymerization tube, dry it, evacuate it and replace it with high-purity nitrogen several times to ensure that the polymerization tube is free of water and oxygen. After the polymerization tube is cooled to room temperature, isoprene, butadiene, n-hexane, organic aluminum and supported titanium catalyst are added in sequence, wherein the feed ratio of butadiene to isoprene is 5:95 (molar ratio), Al / Ti=50 (molar ratio), Ti / Ip=3×10 -4 (molar ratio), the monomer concentration is 4mol / L, pre-polymerized in an ice bath at 0°C for 30min, then transferred to a water bath at 60°C to continue polymerization for 6h, and finally terminated with an ethanol solution containing anti-aging agent 264 (1% by mass) Reaction, the product is taken out and washed repeatedly with ethanol solution, and the copolymerized product is obtained after vacuum drying.
Embodiment 2
[0034] Example 2 adopts the same experimental procedure as that of Example 1, except that the feed ratio of butadiene and isoprene is set at 10:90 (molar ratio).
Embodiment 3
[0036] Example 3 adopts the same experimental procedure as that of Example 1, except that the feed ratio of butadiene and isoprene is set at 15:85 (molar ratio).
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