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爱特(Ende)和候门斯(Hermans)最近应用超离心密度梯度法研究合成高聚物溶液,注意到不同类别的高分子将沉降在不同的区域。例如在超离心測定池中,百分之百的全同立构聚苯乙烯和百分之百的間同立构聚苯乙烯在不同区域內形成图譜,而且对一定高
Recently, Ende and Hermans studied the synthesis of polymer solutions using an ultracentrifugal density gradient method, noting that different classes of polymers would settle in different regions. For example, in an ultracentrifuge cell, one hundred percent isotactic polystyrene and one hundred percent syndiotactic polystyrene are patterned in different regions, and for a certain height