Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/10254
Title: The formation of β-polypropylene crystals in a compatibilized blend of isotactic polypropylene and polyamide-6
Authors: Zhang, RH
Shi, DA
Tsui, CP 
Tang, CY 
Tjong, SC
Li, RKY
Issue Date: 2011
Publisher: John Wiley & Sons
Source: Polymer engineering and science,, 2011, v. 51, no. 2, p. 403-410 How to cite?
Journal: Polymer engineering and science 
Abstract: Compatibilized polypropylene (PP)/polyamide (PA6) blends with and without β nucleating agent (β-NA) are prepared, and are designated as Blend-0.3 and Blend-0, respectively. The melting and crystallization characteristic of the blends crystallized under different cooling rates and different crystallization temperatures are studied. It is observed that high β-PP content can be developed in Blend-0.3 only at slow cooling rates (<5°C/min), whereas high α-PP content is formed at fast cooling rates. Isothermal crystallization analysis of Blend-0 indicates that PA6 is an effective NA for α-PP in the lower temperature range, whereas the α-nucleating effect disappears in the higher temperature range. Blend-0.3 can, therefore, be viewed as a system containing both α- and β-NAs, simultaneously. PA6 is competing with β-NA in inducing PP crystallization. Under the normal injection of Blend-0.3, the melt will be cooled through the higher temperature that favors the effectiveness of β-NA rapidly because of the faster cooling rate. However, the α-nucleation effect from PA6 predominate at the lower temperature. This explains the difficulty in obtaining high β-PP content in Blend-0.3 from injection molding.
URI: http://hdl.handle.net/10397/10254
ISSN: 0032-3888
EISSN: 1548-2634
DOI: 10.1002/pen.21831
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

6
Last Week
0
Last month
0
Citations as of Feb 26, 2017

WEB OF SCIENCETM
Citations

6
Last Week
0
Last month
0
Citations as of Aug 15, 2017

Page view(s)

36
Last Week
0
Last month
Checked on Aug 13, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.