22-09-2018 09:41:46

Tailoring polymer friction, wear and lubrication

Tribology is the study of friction, wear and lubrication. This seminar covers: definition of tribology and lubrication, tribology of thermoplastics and grafted polymer surfaces and how to measure such properties. This is illustrated by industry cases.
Arrangør: IDA Polymer

Whenever two surfaces are in contact and in relative motion, there is friction and wear. Very often this is a technical challenge due to loss of mechanical energy, generation of heat or wear. Tribology is the study of friction, wear and lubrication.

The purpose of this seminar is to give insight and inspiration for solving such challenges by treating the subjects: Definition of tribology and fluid lubrication, tribology of thermoplastics and grafted polymer surfaces and how to measure tribological properties. This is illustrated by industry contributions on the subject.

 

Program

9.15    Registration

9.30    Welcome

9.40    Introduction to tribology. Assoc. Prof. Ion Sivebæk, DTU and Novo Nordisk A/S

10.00  Tribology of thermoplastics, Assoc. Prof. Ion Sivebæk, DTU, Novo Nordisk A/S

10.30  Fluid lubrication, Assoc. Prof. Seunghwan-Lee, DTU

10.50  Tribology of grafted polymer surfaces, PhD. Troels Røn, DTU

11.30  Polymer tribology measurement methods, Rob van Beek, ST Instruments BV

12.00  Lunch

13.00  Hydrophilic Coating – living tissue interaction, some issues, Niels Jørgen Madsen, R&D Chief Principal Scientist, Coloplast A/S

13.30  Applied tribology in mechanical systems, Ion Sivebæk, Novo Nordisk A/S

13.50  Break - Coffee and cake

14.20  Title pending, Product Manager Lubrication, Ole Stuckmann, Diatom A/S

14.50  Additives in thermoplastics for tribological purposes; What do You need?, Dan-Ola Svensson, Regional Technical Manager, Europe, Clariant

15.20  Wrap-up

 

Summary

Introduction to tribology, Assoc. Prof. Ion Marius Sivebaek, DTU and Novo Nordisk.

Tribology is the science and technology of surfaces in contact sliding against each other. Key words are: Friction, wear and lubrication. Although the word tribology wasn’t coined until the 1960s, the scientific area has been studied for centuries. Leonardo Da Vinci (1452-1519) made some pioneering experiments which lead to the laws of Amontons in 1699. Hereafter most of the progress has been done on fluid film lubrication and rubber friction. Wear understanding is still at a very primitive level.

 

Tribology of thermoplastic polymers, Ion Marius Sivebaek, DTU and Novo Nordisk.

Thermoplastic polymers are widely used for device parts as they can be injection moulded. 95% of the literature on polymer tribology deals with polymer against metal contact. Most parts in a medical prefilled device are made of polymeric materials so the sliding interfaces are polymer against polymer contacts. The friction characteristics in these are very different from the cases where a metal is involved. The presentation will include some of these differences and a case where a “dry” contact shows “wet” behavior and vice-versa.

 

Fluid lubrication, Assoc. Prof. Seunghwan Lee, DTU

Fluid is a most conventional form of lubricants for engineering systems. Rheological properties of fluids, among others, have a significant influence on the lubricating efficacy of fluids as lubricant. Additionally, the lubricating efficacy is also significantly influenced by contact conditions, such as contact geometry, load, and speed. A general overview on the lubrication regimes that can be achieved by fluids, as well as new fluids that are emerging to replace conventional petroleum-based oils and greases is provided in this talk. 

 

Tribology of grafted polymer surfaces, Troels Røn, PhD, DTU

Surface grafted polymer chains at high density, namely in “brush-like” conformation, provide a very unique and effective lubrication in good solvent environment. This approach is particularly useful in utilizing water in boundary lubrication (i.e. close surface contact) where elastohydrodynamic lubrication (EHL) is not achieved. In this talk, an overview of recent studies on neutral and polyelectrolyte-based brushes, both of synthetic and biological origins, in aqueous environment are presented.

 

Polymer tribology measurement methods, Rob van Beek, ST Instruments BV

Tribology is the science and technology of two interacting surfaces in relative motion and of related subjects and practices. The Anton Paar (previously known as CSM Instruments) Tribometer should allow you to create results comparing the wear and friction behaviour of, for example, various polymers for a specific application in an easy, inexpensive and repeatable manner. The Tribometer is thought to be a first step into characterization of the tribological behaviour of the materials tested. Important to note is that any tribological contact and behaviour is influenced by the samples (disc and ball), the environment (e.g. lubrication, temperature) and the chosen test parameters. ST Instruments supplies a wide range of Tribological testing equipment in the nano- and micro range which can be equipped with several options which allow simulation of real life conditions of a practical wear/friction situation.

 

Hydrophilic Coating – living tissue interaction, some issues, Niels Jørgen Madsen, R&D Chief Principal Scientist, Coloplast A/S

The understanding of friction, wear and lubrication of hydrophilic coated catheter for intermittent self-catheterization and bladder management in the care of people with spinal cord injury (SCI), Spina Bifida, Multiple Sclerosis etc. is crucial to minimize or avoid discomfort and trauma. In the presentation, the effect osmotic transport phenomenon and polymer coating interaction with living tissue will be addressed.

 

Applied tribology in mechanical systems, Ion Sivebæk, Novo Nordisk A/S

Abstract pending

 

Title pending, Product Manager Lubrication, Ole Stuckmann, Diatom A/S

Abstract pending

 

Additives in thermoplastics for tribological purposes; What do You need?, Dan-Ola Svensson, Regional Technical Manager, Europe, Clariant

Abstract pending

 

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