Growth kinetics of polyethylene single crystals: (II) Growth of {110} faces of crystals from dilute solutions in decalin and in octane

Cooper, Matthew A.; Manley, R. St. John

doi:10.1007/bf01382570

Colloid Polymer Sci

1976

DOI: 10.1007/bf01382570

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Growth kinetics of polyethylene single crystals: (II) Growth of {110} faces of crystals from dilute solutions in decalin and in octane

Matthew A. Cooper

R. St. John Manley

Abstract: G r o w t h k i n e t i c s o f p o l y e t h y l e n e single crystals:(II) G r o w t h of {110) faces of crystals f r o m dilute solutions in decalin and in octane M . Cooper and R . S t . J . M a n l e y

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Cited by 9 publications

References 8 publications

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Supermolecular structures obtained in systems polyethylene–low molecular solvent on cooling

Michailov

Minkova

1983

Acta Polymerica

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Some peculiarities of the influence of the phase state of systems polyethylenelow molecular solvent on tlie morphology of the supermolecular structure of polyethylene were eslablished. With equal concentrations and almost equal crystallization temperatures it is possible to obtain Iletlritcs a n d banded spherulites depending o n the phase state determined by the phase diagram. I n Systemen aus Polyethylen und niederrnolekularen Losungstti itteln erhaltene ubermolekulare StrukturenEinige Besonderheiten des Einflusses des Phasenzustandes von Systemen aus Polyethylen und niederrnolekularen Losungsmitteln auf die Morphologie der ubermolekularen Struktur des Polyethylens werden dargelegt. Bei gleicher Konzentration und etwa gleichen Kristallisationstemperature11 ist es moglich, in Abhangigkeit von dem durch das Phasendiagramni bestimmten Phasenzustand Hedritc uud gebanderte Spharolithe zu erhalten.

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Supermolecular structures obtained in systems polyethylene–low molecular solvent on cooling

Michailov

Minkova

1983

Acta Polymerica

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“Lamellar and fibrillar crystallization of polymers”

Pennings¹

1979

Makromol. Chem.

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An isochronous decoration method for measuring linear growth rates in polymer crystals

Dosière

Colet

Point

1986

J Polym Sci B Polym Phys

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The long spacing l of lamellar crystals of linear polyethylene increases with the crystallization temperature Tc. For low degrees of supercooling, the ratio Δl/ΔT is around 0.5 nm K−1 for PE single crystals obtained from solution in xylene. In the restricted situation where only conduction in the crystallization vessel is involved, a heat transfer analysis shows that about 20 s is needed to change by 5 K the crystallization temperature Tc in a cylindrical vessel of 1.5 mm radius. Such rapid change of the crystallization temperature induces a sharp increase or decrease of the thickness of the single crystals. After conventional shadowing with palladium–gold alloy, the steps on the crystals are observed by conventional bright‐field electron microscopy. A pioneering work was performed in this way by Bassett and Keller in 1962. Our technique allows one to determine both the shape and the dimensions of single crystals or twinned crystals of polyethylene as a function of the time of crystallization, and therefore give the quasi‐instantaneous growth rates at various times.

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Growth kinetics of polyethylene single crystals: (II) Growth of {110} faces of crystals from dilute solutions in decalin and in octane

Abstract: G r o w t h k i n e t i c s o f p o l y e t h y l e n e single crystals:(II) G r o w t h of {110) faces of crystals f r o m dilute solutions in decalin and in octane M . Cooper and R . S t . J . M a n l e y

Cited by 9 publications

References 8 publications

Supermolecular structures obtained in systems polyethylene–low molecular solvent on cooling

Supermolecular structures obtained in systems polyethylene–low molecular solvent on cooling

“Lamellar and fibrillar crystallization of polymers”

An isochronous decoration method for measuring linear growth rates in polymer crystals

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