“…The linear increase in M n after styrene addition, the complete shift of the SEC traces (both refractive index and UV traces), and the decrease in the M w / M n to 1.27 clearly indicated that chain extension was effective. Furthermore, liquid adsorption chromatography (LAC) 25 (Figure ), which performs separation according to the chemical composition, did not show any detectable poly( n -butyl acrylate) homopolymer, signifying efficient reinitiation by the first block. A different result was found when styrene was polymerized first; in particular, reinitiation was incomplete, even at high conversion in the second step, as demonstrated by the SEC and LAC analyses.…”