JP IBAR's Tutorials

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Dual-Phase Crystallization in PET

Dual-Phase Crystallization in PET

27 Pages |87 Views

We analyze constant rate cooling and heating crystallization kinetics of PET samples by DSC. The samples have various degree of disentanglement, obtai...

Rheo-Cooling Applied to Plastics

Rheo-Cooling Applied to Plastics

8 Pages|148 Views

Rheology can be used during processing to induce non-equilibrium states that modify the properties of the materials formed under those conditions. Thi...

Rheo-Cooling of Water is...COOL

Rheo-Cooling of Water is...COOL

5 Pages |112 Views

In the video of this presentation we freeze 1 liter of water in less than 5 sec.<br/>The text explains what happens: we call this Rheo-Cooling.&...

The Source of Molecular Motion and Flow in Polymers.

The Source of Molecular Motion and Flow in Polymers.

377 Views

Video Clip Lecture #21: describes how conformers interactions are responsible for molecular motions and flow in polymers, below Tg in glasses, and abo...

Video Clip Lecture #13 "Rheology of Melts at constant (T-Tg)

Video Clip Lecture #13 "Rheology of Melts at constant (T-Tg)

517 Views

Video Clip Lecture #13: describes the formulation of rheology at constant free volume, i.e. at constant (T-Tg) instead of classically done constant T....

Viscosity Reduction by Entanglement Manipulation Lecture #38

Viscosity Reduction by Entanglement Manipulation Lecture #38

66 Pages|597 Views

This lecture is a continuation of Lecture #37 (Introduction) and gives substantially more details to the subject of Viscosity Reduction of Plastics by...

Slides for Lecture #3 Instabiliity of the Entanglement Network

Slides for Lecture #3 Instabiliity of the Entanglement Network

74 Pages |239 Views

This set of slides was used for lecture #3 of April 9th 2011. The narrative is included in the recorded version, also downloadable on WIZIQ In this le...

Incidence of Talpha on the Formulation of Rheological Equations

Incidence of Talpha on the Formulation of Rheological Equations

56 Pages|475 Views

This set of slides is a post-version of the slides used for my Class #2 after I received comments by students. I added some comments and captions to m...

ANSWERS to the ENTANGLEMENT QUIZZ

ANSWERS to the ENTANGLEMENT QUIZZ

23 Pages |375 Views

In this document I provide the answers to the Entanglement Quizz preceeding CLASS #1 (on January 13th) which addressed the subject of "The Need f...

Interactive Coupling Between Relaxation Modes in Polymers

Interactive Coupling Between Relaxation Modes in Polymers

719 Views

This lecture describes how bonds interact and cooperate their motions as studied by thermal stimulation under a voltage field. Coupling is described b...

Table of Contents of THE GREAT MYTHS IN POLYMER RHEOLOGY, part II

Table of Contents of THE GREAT MYTHS IN POLYMER RHEOLOGY, part II

3 Pages |793 Views

This file describes the Table of Content of the article "The Great Myths of Rheology, Part II:Transient and Steady State Melt Deformation: the Qu...

The Great Myths of Rheology Part II: Transient and Steady State

The Great Myths of Rheology Part II: Transient and Steady State

218 Pages|1148 Views

This paper deals with the transient states in polymer rheology, in particular those transients triggered by a departure from the linear range of visco...

The Great Myths of Polymer Rheology-Part I

The Great Myths of Polymer Rheology-Part I

57 Pages |1469 Views

This article examines the following issues in polymer rheology:<br/>Is the separation of temperature and molecular weight in the expression of v...

Shear-Thinning Aspects for Polymer Melts

Shear-Thinning Aspects for Polymer Melts

1143 Views

Description of shear-thinning of polymer melts in either cooling mode at constant frequency in a dynamic rheometer or at constant temperature but vari...

Lecture #37-Disentanglement Control to Enhance Plastics Processing

Lecture #37-Disentanglement Control to Enhance Plastics Processing

13 Pages |942 Views

It has been empirically demonstrated by experiments I conducted in the last 10 years that thermal-mechanical history of a polymer melt, in particular ...

Introduction (audio) to this new course in Polymer Physics

Introduction (audio) to this new course in Polymer Physics

503 Views

This 15 minutes audio presentation provides some generalities about the upcoming lectures.

Triggered Time Dependence of Viscosity in a lab rheometer

Triggered Time Dependence of Viscosity in a lab rheometer

1026 Views

Strain softening triggers time dependent effects in polymer melts when it is coupled with shear-thinning due to increasing frequency. Classical formul...

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About JP IBAR

  • JP IBAR
    JP IBAR
  • 56 Followers
  • 4 Members recommend
  • 1 Test created
  • 17 Tutorials added

Profile Summary

After many years in Corporate Research, in both experimental and theoretical polymer physics, I have recently started an academic career as a Fulbright Scholar, Marie-Curie Awardee and HDR of the University of UPPA (Pau, France). My intense review work of the field for the last 5 years has led me to write a book and conduct a series of courses and lectures on a new way to consider polymer physics. I hope that my contribution to the understanding of entanglements will benefit processing of polymers in many novel ways. Finally, my long time desire to teach on line what I have learned, from my own experience, is made possible by the recent advances in web communication technology.

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