Structure and crystallization kinetics of poly( L ‐lactic acid)

作者：Carla Marega, Antonio Marigo, Vito Di Noto, Roberto Zannetti, Antonino Martorana, Guglielmo Paganetto · 发表于：Die Makromolekulare Chemie · 年份：1992 · DOI：10.1002/macp.1992.021930704 · 被引用次数：110 · 研究领域：biodegradable polymer synthesis and properties、Polymer crystallization and properties、Carbon dioxide utilization in catalysis

Abstract A structural investigation is described of poly(L‐lactic acid) by best fitting of powder X‐ray diffraction patterns. The examined sample shows the already known pseudo‐orthorhombic α‐form, and it was possible to determine the location of the two 103 polymeric helices in the unit cell and the size distribution of the crystallites. Furthermore, a study is reported of the crystallization kinetics of the above cited polymer by light depolarization measurements in an optical microscope. The crystallization kinetic constants in bulk were evaluated in a temperature range (70–165°C) wider than that previously resulting from measurements of radial growth of spherulites.