NUCLEATING AGENT, AND CRYSTALLINE POLYMER COMPOSITION CONTAINING SAID NUCLEATING AGENT

摘要

A nucleating agent comprising a crystalline polymer, wherein the crystalline polymer is a derivative produced by the esterification or etherification of a xylan having a repeating structural unit represented by structural formula (1) and has a number average molecular weight ranging from 3,000 to 150,000 in terms of polystyrene as measured by a gel permeation chromatography method using an organic solvent.