✦ LIBER ✦

A generalized equation for the prediction of melting temperatures of homopolymers and copolymers

✍ Scribed by Musa R. Kamal; Lijun Feng; Tao Huang

Publisher: John Wiley and Sons
Year: 2002
Tongue: English
Weight: 943 KB
Volume: 80
Category: Article
ISSN: 0008-4034
DOI: 10.1002/cjce.5450800312

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

A generalized equation was derived to calculate the melting temperatures of homopolymers and copolymers. The Gibbs‐Thomson equation for homopolymers and a modified application to copolymers were derived using the proposed equation. The melting temperature T~m~^0^ in the Flory equation corresponds to the melting temperature T~m~^C,∞^ of copolymer crystals with stems of infinite length. Also, T~m~^C,n^*, the melting temperature for copolymer crystals with stems containing the maximum possible number of structural units, n*, should be used instead of T~m~^0^ as the basis of supercooling in crystallization. The proposed equation shows good agreement with experimental data for α‐alkene‐ethylene homogeneous copolymers.

📜 SIMILAR VOLUMES

Equilibrium Melting Temperature of Poly(

Equilibrium Melting Temperature of Poly(ferrocenyl dimethylsilane) in Homopolymers and Lamellar Diblock Copolymers with Polystyrene

✍ Jianjun Xu; Vasilios Bellas; Bernd Jungnickel; Bernd Stühn; Matthias Rehahn 📂 Article 📅 2010 🏛 John Wiley and Sons 🌐 English ⚖ 363 KB

## Abstract The equilibrium melting temperature, __T__~m,0~, of poly(ferrocenyl dimethylsilane) (PFDMS) is re‐investigated using two PFDMS homopolymers and a PS‐__b__‐PFDMS copolymer (PS: polystyrene). The melting temperatures of samples crystallized at different crystallization temperatures, __T__

Generalized prediction of isothermal com

Generalized prediction of isothermal compressibilities and an isothermal equation of state for liquid mixtures

✍ S. Waseem Brelvi; John P. O'Connell 📂 Article 📅 1975 🏛 American Institute of Chemical Engineers 🌐 English ⚖ 488 KB 👁 2 views

A generalized equation of state for poly

A generalized equation of state for polymers

✍ Herbert L. Whitaker; Richard G. Griskey 📂 Article 📅 1967 🏛 John Wiley and Sons 🌐 English ⚖ 329 KB 👁 2 views

A Numerical Method for Solution of the G

A Numerical Method for Solution of the Generalized Liouville Equation

✍ J. Candy 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 354 KB

dq N dp N ϭ const, (3a) A numerical method for the time evolution of systems described by Liouville-type equations is derived. The algorithm uses a lattice of numerical markers, which follow exactly Hamiltonian trajectories, to represent the operator d/dt in moving (i.e., Lagrangian) coordinates. H

A recording differential dilatometer for

A recording differential dilatometer for the investigation of polymer crystallization rates and melting temperatures

✍ Rune J. V. Höjfors; Per G. M. Flodin 📂 Article 📅 1972 🏛 John Wiley and Sons 🌐 English ⚖ 132 KB 👁 2 views

Prediction of Anti and gauche vicinal pr

Prediction of Anti and gauche vicinal proton-proton coupling constants for hexapyranose rings using a generalized karplus equation

✍ C. A. G. Haasnoot; F. A. A. M. De Leeuw; C. Altona 📂 Article 📅 2010 🏛 Wiley (John Wiley & Sons) ⚖ 409 KB

## Abstract A new coupling constant ‐ torsion angle relation for the three‐bond ^1^H‐^1^H spin‐spin coupling constants is utilized to explore the effect of endocyclic and exocyclic oxygen atoms on Jae, Jee and Jaa in hexapyranoid systems. Attention is paid to common stereochemical surroundings rath