142 Advances in Polymer Science Editorial Board: A. Abe. A.-C ...

Poly(macromonomers), Homo- and Copolymerization 137
idized macromonomer, 4, and subsequent hydrolysis gave a dihydroxy-ended
macromonomer, 5, to be used for polycondensation to polyester-g-PHBd.
3. 2
Polystyrenes
(1a)
(1b)
Polystyrene (PSt) macromonomers, 6, almost quantitatively functionalized with
p-styrylalkyl end groups have been prepared by termination of living polystyryllithium
with corresponding p-styrylalkyl bromide or iodide [13]. Termination
of PSt-Li with epichlorohydrin, in benzene plus tetrahydrofuran, was successful
after end-capping with 1,1-diphenylethylene to afford epoxide-ended PSt
macromonomer, 7 [14]. Living polystyryllithium was end-capped with ethylene
oxide, followed by reaction with 5-norbornene-2-carbonyl chloride to afford wnorbornenyl
PSt macromonomer, 8, which was also successfully subjected to living,
ring-opening methathesis polymerization (ROMP) to afford regular comb
PSt, 9, with both the branch and the backbone well-controlled with regard to
(2)
(3)
(4)
(5)