𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Modeling differential scanning calorimetry melting curves of ethylene/α-olefin copolymers

✍ Scribed by Yury V. Kissin

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
646 KB
Volume
49
Category
Article
ISSN
0887-6266

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

A procedure is developed for modeling differential scanning calorimetry (DSC) melting curves of linear polyethylene and ethylene/α‐olefin copolymers produced with single‐center and multicenter polymerization catalysts. The modeling demonstrates that the use of the statistical description of random copolymers and the introduction of several assumptions about the crystallization pattern of long ethylene blocks in ethylene copolymers are sufficient for the representation of most characteristic features of DSC melting curves of the polymers. This type of modeling can be applied to ethylene/α‐olefin copolymers containing up to 10 mol % of an α‐olefin. The approach is, in principle, similar to modeling the results of other analytical techniques used for the characterization of copolymer heterogeneity, such as Tref and Crystaf. © 2010 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys, 2011

📜 SIMILAR VOLUMES

Nonisothermal melting and crystallizatio
Nonisothermal melting and crystallization studies of homogeneous ethylene/α-olefin random copolymers
✍ Man-Ho Kim; Paul J. Phillips 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 234 KB 👁 1 views

A study of nonequilibrium melting, nonisothermal, and isothermal crystallization behavior of ethylene/1-octene (EO) random copolymers, produced using metallocene catalysts has carried out. As branch (or defect) content increases, the nonisothermal and isothermal crystallization rates, melting temper

Crystallization and melting of polyethyl
Crystallization and melting of polyethylene copolymers: Differential scanning calorimetry and atomic force microscopy studies
✍ Francis M. Mirabella 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 602 KB

## Abstract The Hoffman–Lauritzen theory of secondary, surface nucleation and growth was primarily relied upon for about 40 years after its introduction in about 1960 to rationalize the crystallization of flexible chain polymers into lamellar crystals. However, in about 1998, Strobl and coworkers i

Free Volume, Glass Transition and Degree
Free Volume, Glass Transition and Degree of Branching in Ethylene/α-Olefin Copolymers: Positron Lifetime, Differential Scanning Calorimetry, Wide-Angle X-Ray Scattering, and Density Studies
✍ David Bamford; Günter Dlubek; Thomas Lüpke; Duncan Kilburn; Jarda Stejny; Tammo 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 197 KB

## Abstract Summary: Positron annihilation lifetime spectroscopy, differential scanning calorimetry, wide‐angle X‐ray scattering, and density measurements were used to systematically study the variation of the glass transition temperature __T__~g~ and the mean size __v__~h~ of holes (local free vol

Characterization of ethylene-1-butene co
Characterization of ethylene-1-butene copolymer by differential scanning calorimetry and 13C-NMR spectroscopy
✍ Keiichiro Kimura; Takeo Shigemura; Sakae Yuasa 📂 Article 📅 1984 🏛 John Wiley and Sons 🌐 English ⚖ 469 KB 👁 1 views

Two kinds of ethylene-l-butene copolymers that were produced by the different procedures, that is, the slurry and the high-pressure polymerizations, were characterized by differential scanning calorimetry (DSC) and carbon-13 nuclear magnetic resonance (W-NMR) spectroscopy. The melting points of both

Differential scanning calorimetry of cop
Differential scanning calorimetry of copolymer of isotactic polypropylene backbone with grafted poly(ethylene-co-propylene) branches
✍ Philip M. Whitney; Shiping Zhu 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 112 KB

## Abstract A series of graft polymers having polypropylene (PP) backbone and poly(ethylene‐__co__‐propylene) (EPR) side chains was prepared. PP backbone molecular weight (__M__~__n__~) was 28–98 kg/mol, EPR side chain __M__~__n__~ was 2.6–17 kg/mol, and EPR content was 0–16 wt %. In this work, the