GPC Analysis of Synthetic Resin Containers Composed Mainly of Polylactic Acid

User Benefits

- GPC analysis of synthetic resin containers with polylactic acid (PLA) as the main component can be achieved. - Using a mixed gel column reduces analysis time and eluent consumption.

Introduction

Gel permeation chromatography (GPC) analysis using a refractive index detector is widely used to measure the molecular weight distribution of synthetic polymers such as biodegradable plastics. In GPC analysis, the longer the column length, the better the separation, but the longer analysis time increases in proportion to the length, and eluent consumption is higher. When analyzing samples with a wide range of molecular weights, multiple analytical columns covering the full molecular weight range are typically used. Mixed gel columns, on the other hand, are designed to cover a wide range of molecular weights. Using these enables analysis time and eluent consumption to be reduced. This article describes the analysis of a cup containing PLA as its main component using a Nexera GPC system and a Shodex GPC KF-805L column with a linear calibration curve.

July 28, 2022 GMT