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Melting Temperature Characteristics for Polyethylenes from Crystal Size Distribution

  • L. Feng and M. R. Kamal
Published/Copyright: March 26, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 21 Issue 4

Abstract

Semi-crystalline polymers exhibit broad and multiple peaks in their melting traces. Thus, the melting temperature characteristics of polymers should consider both melting peak positions and melting temperature polydispersity. In this work, the effective melting temperature and temperature polydispersity are defined and calculated from DSC traces, using the crystal size number distribution and the melting temperature equation. Three methods are proposed for calculating melting temperature characteristics. These methods are based on: (i) average crystal size, (ii) the crystal stem number distribution function, and (iii) the monomer structural unit distribution function. They were employed to analyze the isothermal and non-isothermal experimental results for polyethylene polymers, especially linear low-density polyethylene copolymers. The first method, based on the value of average crystal size, gives the most reasonable results, taking into consideration agreement with experimental observations and structural data.

∗ Mail address: M. R. Kamal, Department of Chemical Engineering, McGill University, 3610 University Street, Montreal, Quebec, Canada H3A 2B2. E-mail:

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Received: 2005-11-1
Accepted: 2006-3-7
Published Online: 2013-03-26
Published in Print: 2006-09-01

© 2006, Hanser Publishers, Munich

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  5. Carbon Black Filled Polyester as Electrically Conductive Master Batch for Fibers
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  10. Numerical Simulation of the Effect of Processing Parameters on the Flow Behavior and Break-through Phenomenon in Co-Injection Molding
  11. Study of Shrinkage and Warpage in Microcellular Co-Injection Molding
  12. Melting Temperature Characteristics for Polyethylenes from Crystal Size Distribution
  13. Experimental/Numerical Analysis of Chaotic Advection in a Three-dimensional Cavity Flow
  14. A Numerical Investigation on the Cure Cycle of Composite Brake Blocks
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https://doi.org/10.3139/217.0124

Articles in the same Issue

  1. Contents
  2. Contents
  3. Regular Contributed Articles
  4. A Study of Integration of LIGA and M-EDM Technology on the Micro Injection Molding of Super Thin Plates with Micro Through Holes
  5. Carbon Black Filled Polyester as Electrically Conductive Master Batch for Fibers
  6. Tip-clearance Effect on Mixing Performance of Twin Screw Extruders
  7. Structure Development in Melt Spinning and Cold Drawing of Poly(ethylene-co-octene) Copolymer
  8. Effect of Distributor Geometry on Crimp Contraction of PET Side-by-side Bicomponent Fibers
  9. Effect of Compatibilizer Distribution on Thermal and Rheological Properties of Gelatinized Starch/Biodegradable Polyesters Blends
  10. Numerical Simulation of the Effect of Processing Parameters on the Flow Behavior and Break-through Phenomenon in Co-Injection Molding
  11. Study of Shrinkage and Warpage in Microcellular Co-Injection Molding
  12. Melting Temperature Characteristics for Polyethylenes from Crystal Size Distribution
  13. Experimental/Numerical Analysis of Chaotic Advection in a Three-dimensional Cavity Flow
  14. A Numerical Investigation on the Cure Cycle of Composite Brake Blocks
  15. PPS News
  16. PPS News
  17. Seikei-Kakou Abstracts
  18. Seikei-Kakou Abstracts
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