Multi-parameter in-process monitoring of clay dispersion during melt compounding with PLA

eXPRESS Polymer Letters

P. F. Teixeira¹ 

关键词: nanocomposites;    industrial applications;    extrusion;    exfoliation;    in-process monitoring;   

DOI  :  10.3144/expresspolymlett.2019.23

学科分类：生物科学（综合）

来源: eXPRESS Polymer Letters

【 摘 要 】

The time evolution of organoclay particle size and volume fraction, as well as the shear viscosity, are measuredin-line for a series of Poly(lactic acid)/organoclay composites, using a rheo-optical die coupled to a prototype modular corotatingtwin screw extruder. The small angle light scattering patterns and light attenuation recorded during transient experimentsindicate that clay dispersion develops through melt intercalation between the clay galleries, thereby expanding theaggregates size, and eventually leads to aggregates break-up, i.e., exfoliation. The simultaneous recording of shear viscosityalso indicates that smaller viscosities promote a faster melt intercalation and exfoliation but hinder the extent of clay dispersion.The methodology used in the present study validates the well accepted mechanism for clay dispersion and can beapplied straight away for the monitoring of PNC manufacturing during practical production.

【 授权许可】

CC BY