Influence of Screw Profile Employed During Melt Mixing on the Micro-scale Dispersion of MWCNTs in Poly(propylene)

被引：20

作者：

Mayoral, Beatriz ^{[2
]}

Garrett, Graham ^{[3
]}

McNally, Tony ^{[1
]}

机构：

[1] Univ Warwick, WMG, Coventry CV4 7AL, W Midlands, England

[2] Queens Univ Belfast, Sch Mech & Aerosp Engn, Belfast BT9 5AH, Antrim, North Ireland

[3] Queens Univ Belfast, Polymer Proc Res Ctr, Belfast BT9 5AH, Antrim, North Ireland

来源：

MACROMOLECULAR MATERIALS AND ENGINEERING | 2014年 / 299卷 / 06期

关键词：

dispersion; multi-walled carbon nanotubes (MWCNTs); poly(propylene) (PP); screw profile; twin-screw extrusion; CARBON NANOTUBES; ELECTRICAL-RESISTIVITY; NANOCOMPOSITES;

D O I：

10.1002/mame.201300172

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The relationship between MWCNT dispersion and agglomerate size with the screw profile employed during mixing of MWCNTs and a PP in a twin-screw extruder is investigated. Five screw configurations are designed based on an initial concept of forward conveying and kneading block elements and varying a number of other elements. A screw profile having a toothed mixing element and one reverse conveying element (S3) after the mixing zone is most effective at breaking down MWCNT primary agglomerates. Addition of a second and third reverse conveying element increases the practical residence time but promotes MWCNT re-agglomeration. A screw profile with just forward conveying and kneading block elements (S1) yields the most uniform MWCNT dispersion.

引用

页码：748 / 756

页数：9

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