Oligobutadiene diol

The obtained theoretical predictions have been verified in experiments on real elastomers. The elastomers tested in our experiments were amorphous polybutadiene urethanes (PBU) wifli polymer network of different density 0.3 kmol/m (PBU-1), 0.05 kmol/m (PBU-2), 0.2 kmol/m (PBU-3), 0.1 kmol/m (PBU-4). Oligooxypropylene triol - Laprol 373 was used as a crosslinking agent at the curing of prepolymer of oligobutadiene diol. The elastomer specimens were manufactured in the form of disks, 35 mm in diameter and 2 mm thick. The kinetics of specimen swelling was determined in low-molecular liquids toluene, dibutyl sebacate (DBS), dioctyl sebacate (DOS). 

To understand the restrictions to swelling of SPU caused by the physical network containing hard domains, the following experiments were carried out. Segmented polybutadiene urethane urea (PBUU) on the base of oligobutadiene diol urethane prepolymer with functional NCO-groups (M 2400), cured with MOCA, and SPU-10 based on prepolymer cured with the mixture of MOCA and oligopropylene triol (M 5000) were used. The chemical network densities of PBUU and SPU were 0.05 and 0.08 kmol/m, respectively. The physical network density of initial sample, (VeA o)d> of PBUU was 0.99 kmol/m and of SPU-10 was 0.43 kmol/m. ... 

Abbreviations PTMA poly(tetramethylene adipate) PEA poly(ethylene adipate) MDI diphenyl-methane diisocyanate BD butane diol PAN polyacrylonitrile Ar polyarylate OBU oligobutadiene-urethane... 

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