Rheological behavior of original and recycled cellulose-polyolefin composite materials

被引：30

作者：

Gonzalez-Sanchez, C. ^{[1
]}

Fonseca-Valero, C. ^{[2
]}

Ochoa-Mendoza, A. ^{[2
]}

Garriga-Meco, A. ^{[2
]}

Rodriguez-Hurtado, E. ^{[3
]}

机构：

[1] Univ Oviedo, Dept Ingn Quim & Tecnol Media Ambiente, E-33071 Oviedo, Spain

[2] Univ Politecn Madrid, EUIT Ind, Dept Quim Ind & Polimeros, Madrid 28012, Spain

[3] Univ Politecn Madrid, ETSI Ind, Dept Ingn Quim & Media Ambiente, E-28006 Madrid, Spain

来源：

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2011年 / 42卷 / 09期

关键词：

Wood; Rheological properties; Injection molding; Recycling; LOW-DENSITY POLYETHYLENE; FLOW BEHAVIOR; FIBER; DEGRADATION;

D O I：

10.1016/j.compositesa.2011.04.012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of shear rate, fiber content and type of matrix on the melt rheological behavior of cellulose-reinforced polyolefin composites before and after their mechanical recycling was investigated, due to their relevance for the suitable engineering design of their processing operations. Original composites of HDPE or PP with residual Kraft pulp fiber contents of 10, 25, 40 and 48 wt% were obtained in a thermokinetic mixer. Five-cycle reprocessed composites were produced by successive injection molding. Capillary rheometry enabled us to obtain rheological curves for all these composites, and developing a new statistically checked modified Ostwald-de-Waele model for predicting their rheological behavior in real situations. The rheological data collected, along with SEM and TGA analysis, mainly revealed a more pronounced degradation of cellulose fibers for the HOPE-matrix reprocessed composites, a greater pseudoplasticity loss upon recycling for the PP-matrix composites than for HDPE-matrix ones, and that fiber's dispersion was independent of matrices used. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：1075 / 1083

页数：9

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