2. Summary
Butadiene hydroxytelechelic oligomers can be synthesized by three polymerization processes: radical, anionic and metathesis. We are particularly interested in the radical polymerization process, which accounts for most of the world's production of PBHT (hydroxytelechelic polybutadiene), under the brand name Poly bd® by ATOFINA.
2.1 The monomer
Butadiene is a gaseous, flammable and toxic monomer:
boiling point is - 4.5 ˚C
critical point: TC = 161.8 ˚C and PC = 4,204.3 kPa
Table 1 gives its saturation vapour pressure (in kPa) between 170 and 431 K.
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Summary
Characterization
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