Abstract
AbstractPoly(vinyl chloride)–polyol (AB)x block copolymers have been prepared by the condensation polymerization of low‐molecular‐weight hydroxy‐terminated poly(vinyl chlorides) (PVC) and diisocyanate‐capped polyester and polyether diols. The difunctional poly(vinyl chlorides) were synthesized by ozonization of commercial resin followed by metal hydride reduction. The (AB)x block copolymers, which contained 3000 or 4300 molecular weight PVC block sizes and 1000–2000 molecular weight polyol segments, had a wide range of mechanical properties, depending on overall polymer structure. Tensile strengths ranged from 7.8 to 31.5 MPa, elongations from 125% to 610% and torsional stiffness temperatures (Tf) from 25°C to −22°C.
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