聚（丙烯酸正丁酯-r-丙烯酸羟乙酯）无规共聚物 Mw 40,000 ,HEA~10mol%, 30wt% THF，Mw 95,000 ,HEA~10mol%, 30wt% THF，Mw 50,000 ,HEA~10mol%, 30wt% THF
