Ethylene → HCID 87214538, compound

Participants

Reaction Steps

A Parr reactor was loaded with 33.3 mg (0.0673 mmol) of Cu (tetEtBBIM) Cl2 and 30 mL of toluene, followed by the addition of 2.0 mL of 30% MAO (0.010 mol) to give a yellow suspension. A 5 mL quantity (44 mmol) of n-butyl vinyl ether was added with no immediate color change. The Parr reactor was sealed and taken to a hood containing the controllers for the reactor. The reactor was pressurized with 750 psig of ethylene and the mixture was reacted at 60° C. for 20 hours. The reaction was cooled, quenched and the product was isolated. The polymer was soaked in MeOH/HCl to remove catalyst residues. The product was washed and dried to yield 0.420 g of viscous oil. TON (n-butyl vinyl ether)=61; TON (ethylene)=11.5. IR (film, KBr plate, cm−1) 2958(s), 293 1(s)(CH2), 2872(s), 1465(s), 1458(s), 1377(m), 1093(s), 1039(m), 979(w), 932(w), 913(w), 859(w), 802(m) 737(m) CH2, 13C NMR (CDCl3+CrAcAc)3 δ 13.5 (s, CH3), 19.5 (s, CH2) 29.5-30.0 (m, —CH2—), 31.0(s,CH2) 39.0-41.5 (m, CH2), 68.5(m —CH—O), 73.5 (m, —OCH2). The presence of the —CH—O resonance at 68.5 ppm indicates an in-chain copolymer. Integration of the NMR indicates a copolymer composition of 84.3% n-butyl vinyl ether, and 15.8% ethylene. The polymer Tg=−97, −63° C. with no Tm is consistent with copolymer formation. GPC (polystyrene calibration with DRI and UV detection at 215 nm), Mn=5390, Mw=23620, Mw/Mn=4.38. The presence of UV activity across the molecular weight-distribution confirms copolymer formation.

Provenance & Evidence