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Article: Effect of mould temperature on the formation of α/β polypropylene blends in injection moulding

TitleEffect of mould temperature on the formation of α/β polypropylene blends in injection moulding
Authors
KeywordsΑ/Β Blends
Injection Moulding
Mould Temperature
Polypropylene
Issue Date1997
PublisherElsevier SA. The Journal's web site is located at http://www.elsevier.com/locate/jmatprotec
Citation
Journal Of Materials Processing Technology, 1997, v. 63 n. 1-3, p. 472-475 How to Cite?
AbstractPolypropylene was doped with 1% pimelic acid/calcium stearate to stimulate the growth of β-phase PP crystals to form α/β polypropylene blends in injection moulding. The effect of mould temperature on the composition of the blends was investigated. The degree of crystallinity of β-phase PP was found to increase with mould temperature from 20.6% at 60°C to 32.7% at 140°C while the crystallinity of α-phase PP dropped from 34.8% to 27.0%. When same moulding process was used, the overall degree of crystallinity of the α/β blends was similar to that of the pure samples which contained α-phase crystals only. For mould temperatures above 110°C, the β-phase crystals exhibited a distinctive fusion peak near 150°C in the differential scanning calorimetry (DSC) analysis. When the mould temperature was below 110°C, however, the β-fusion peak began to separate into small peaks from 131 to 152°C as a result of crystals formed under relatively rapid cooling conditions near the mould surface. In addition to the diffraction peaks of the α-phase PP, WAXS showed one extra peak at 29 = 16.0° corresponding to the {3 O 0} plane of the β-phase crystals.
Persistent Identifierhttp://hdl.handle.net/10722/156452
ISSN
2015 Impact Factor: 2.359
2015 SCImago Journal Rankings: 1.464
References

 

DC FieldValueLanguage
dc.contributor.authorLi, JXen_US
dc.contributor.authorCheung, WLen_US
dc.date.accessioned2012-08-08T08:42:29Z-
dc.date.available2012-08-08T08:42:29Z-
dc.date.issued1997en_US
dc.identifier.citationJournal Of Materials Processing Technology, 1997, v. 63 n. 1-3, p. 472-475en_US
dc.identifier.issn0924-0136en_US
dc.identifier.urihttp://hdl.handle.net/10722/156452-
dc.description.abstractPolypropylene was doped with 1% pimelic acid/calcium stearate to stimulate the growth of β-phase PP crystals to form α/β polypropylene blends in injection moulding. The effect of mould temperature on the composition of the blends was investigated. The degree of crystallinity of β-phase PP was found to increase with mould temperature from 20.6% at 60°C to 32.7% at 140°C while the crystallinity of α-phase PP dropped from 34.8% to 27.0%. When same moulding process was used, the overall degree of crystallinity of the α/β blends was similar to that of the pure samples which contained α-phase crystals only. For mould temperatures above 110°C, the β-phase crystals exhibited a distinctive fusion peak near 150°C in the differential scanning calorimetry (DSC) analysis. When the mould temperature was below 110°C, however, the β-fusion peak began to separate into small peaks from 131 to 152°C as a result of crystals formed under relatively rapid cooling conditions near the mould surface. In addition to the diffraction peaks of the α-phase PP, WAXS showed one extra peak at 29 = 16.0° corresponding to the {3 O 0} plane of the β-phase crystals.en_US
dc.languageengen_US
dc.publisherElsevier SA. The Journal's web site is located at http://www.elsevier.com/locate/jmatprotecen_US
dc.relation.ispartofJournal of Materials Processing Technologyen_US
dc.subjectΑ/Β Blendsen_US
dc.subjectInjection Mouldingen_US
dc.subjectMould Temperatureen_US
dc.subjectPolypropyleneen_US
dc.titleEffect of mould temperature on the formation of α/β polypropylene blends in injection mouldingen_US
dc.typeArticleen_US
dc.identifier.emailCheung, WL:wlcheung@hkucc.hku.hken_US
dc.identifier.authorityCheung, WL=rp00103en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0030834888en_US
dc.identifier.hkuros21269-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0030834888&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume63en_US
dc.identifier.issue1-3en_US
dc.identifier.spage472en_US
dc.identifier.epage475en_US
dc.publisher.placeSwitzerlanden_US
dc.identifier.scopusauthoridLi, JX=7410061004en_US
dc.identifier.scopusauthoridCheung, WL=7202743084en_US

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