e-journal

Preparation of short carbon fiber/polypropylene fine-celled foams in supercritical CO2

---

This article reports an attempt to improve polypropylene fine-celled foaming with the incorporation of short carbon fibers. The carbon fibers with uniform dispersion in polypropylene matrix were obtained in reference to the way of papermaking. The composites were prepared via melt compounding in a twin-screw extruder followed by injection molding. Three concentrations of carbon fibers, 5, 15 and 25 wt.%, were used. The foaming was carried out by a batch foaming process with supercritical CO2 as the physical blowing agent. The results showed the foamed composites had well-defined
closed cell structure, but large amount of unfoamed regions and non-uniform cell size
distribution were observed at the lowest carbon fibers content. Further incorporating
carbon fibers decreased the crystallinity and increased the melt viscoelasticity. As a
result, the composites had higher CO2 solubility with the increment of carbon fibers
content. It is found that the foamed composite with 25 wt.% carbon fibers had the most
uniform size distribution and better cell morphology compared to the other two composites.
The increment in the cell density with increasing carbon fibers content indicated
that the bubble nucleation was dominated by the heterogeneous mechanism with the addition of carbon fibers. The poorly bonded interface between carbon fibers and polypropylene could serve well as nucleation sites.

Keywords Polypropylene, composites, short carbon fiber, foam, supercritical CO2 School

---

Ketersediaan

Tidak ada salinan data

Informasi Detail

Judul Seri

Journal of Cellular Plastics

No. Panggil

-

Penerbit

: SAGE Publications Ltd., 2012

Deskripsi Fisik

Journal of Cellular Plastics 49(1) 65–82 , 2012

Bahasa

English

ISBN/ISSN

-

Klasifikasi

-

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

-

Subjek

BIOKIMIA

Info Detail Spesifik

-

Pernyataan Tanggungjawab

hasnidar/agus

Versi lain/terkait

Lampiran Berkas

Komentar

---

Anda harus masuk sebelum memberikan komentar