Abstract
Herein, the enhanced preparation of alkoxyamine-functionalized poly(p–phenylene)s (PPP) via Suzuki polycondensation (SPC) using microwave irradiation is described. Microwave heating effects a drastic decrease of reaction times compared to conventional heating. By varying the diboronic acid esters within the polymerization process different chain lengths of PPPs ( = 1900−3600 g mol−1) could be prepared. In addition, by exchange of the catalyst and base either preferably mono- or bis-alkoxyamine-terminated PPPs could be obtained. These macroinitiators are then applied for the nitroxide-mediated radical polymerization (NMRP) of N–isopropylacrylamide (NIPAAm) to form PNIPAAm-b-PPP-b-PNIPAAm block copolymers ( = 24 900–38 400 g mol−1, / = 1.54–1.67).
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