Synthesis of Comb Graft Copolymers (Ⅱ)

Abstract

Abstract:

Diels-Alder reaction of cyclopentadiene, refined from the by-product C₅ fraction in petrochemical industry, and allyl chloride (AC) was carried out by a polymer supported BF₃ catalyst to synthesize 5-chloromethyl-2-norbornene (NBCH₂Cl). The latter was lithiated and used as an initiator for lhe living anionic polymerization of styrene. A norbornyl-PS macromonomer (NB-PS) was synthesized.Under the catalysis (initiation) of a polymer supported ruthenium carbene complex the macromonomer undergoes ring, opening metathesis polymerization (ROMP) and a comb-shaped graft copolymer was synthesized. The catalytic behaviour of the polymer supported boron trifluoride and ruthenium carbene catalysts is superior to that of their corresponding unsupported counterparts. The mechanism of effect of the polymer supports in increasing catalyst stability and lifetime of the labile propagation active species of metal carbene was discussed.

Key words: living anionic polymerization, ring opening metathesis polymerization, macromonomer, polymer supported catalysts, ruthenium, boron

CLC Number:

O631

TrendMD:

LI Hong, ZHANG Wen-Fang, HE Bing-Lin. Synthesis of Comb Graft Copolymers (Ⅱ)[J]. Chem. J. Chinese Universities, 2001, 22(S1): 273.

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Synthesis of Comb Graft Copolymers (Ⅱ)

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