MIT Researchers Develop Aligned Polymer Fibres for Heat Transfer Applications

This sequence of scanning electron microscopy (SEM) images demonstrates drastic changes in polyethylene surface morphology resulting from the fabrication process. The initial polymer particulate material resembled tightly wound balls of string (a). Comparing this to the extruded sample (b), however, polymer disentanglement as a result of the high shear rate Couette-based extrusion process is evident. SEM images of 50× (c) and 100× (d) drawn films. As shown, film structure is uniform fibrous with minimal defects. Scale bar represents 100 microns (a), and 2 microns (b-d). Image credit: Technology

Researchers from Cambridge’s Massachusetts Institute of Technology (MIT) have designed a continuous fabrication system for producing polymer films with highly aligned molecular chains.

The molecular alignment of polymer fibres plays a key role in enhancing the thermal and mechanical properties of polymeric materials. However, current fabrication techniques for highly aligned polymer films (HAPFs) are restricted to lab-scale production.

The new scalable fabrication process allows energy-efficient polymer fibres to be produced at low cost to suit various applications such as heat exchangers, electronic packaging and heat transfer. The researchers have successfully resolved the challenges involved in scaling and regulation of process variables.

By taking advantage of the inherent high thermal conductivity of polymers' C-C bond, and a corresponding reduction in chain entanglements and defects, this process opens the door for transforming materials which are traditionally considered thermal insulators into something that is ideal for use in heat transfer applications.

Professor Gang Chen, Ph.D, of the Massachusetts Institute of Technology and Principal Investigator on the paper.

In this experiment, researchers controlled the molecular chains of the polymers through disentanglement and macroscopic plastic deformation-induced alignment in order to tweak their material properties.

When compared to traditional fabrication methods, this new technique has numerous benefits such as uniform and crystalline film production by constant-force adaptive-thickness mechanical drawing system, automated scalable platform and enhanced chain disentanglement by using Couette flow. The disentangled structure in the extruded polymer gel was made to freeze through liquid N2 cooling.

Ultra-high molecular weight polyethylene was used in the experiment, resulting in over 15m long HAPFs with crystallinity more than 99%. This technology can be combined with the existing methods of fabricating aligned polymer fibres. Film forms of polymeric fibres find applications in biomedical treatments, electronic systems and heat exchangers.

The team at MIT are now hoping to characterise the changes in polymeric structures with respect to the draw ratio, correlate the properties of the material by changing molecular weights and analyse the orientation of highly aligned polymers. The integration of this technology with electrically conductive nanofiller composites improves the electrical conductivity, thermal conductivity and tunable strength of composites for commercial applications.

Alexander Chilton

Written by

Alexander Chilton

Alexander has a BSc in Physics from the University of Sheffield. After graduating, he spent two years working in Sheffield for a large UK-based law firm, before relocating back to the North West and joining the editorial team at AZoNetwork. Alexander is particularly interested in the history and philosophy of science, as well as science communication. Outside of work, Alexander can often be found at gigs, record shopping or watching Crewe Alexandra trying to avoid relegation to League Two.


Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    Chilton, Alexander. (2014, October 07). MIT Researchers Develop Aligned Polymer Fibres for Heat Transfer Applications. AZoM. Retrieved on March 01, 2024 from

  • MLA

    Chilton, Alexander. "MIT Researchers Develop Aligned Polymer Fibres for Heat Transfer Applications". AZoM. 01 March 2024. <>.

  • Chicago

    Chilton, Alexander. "MIT Researchers Develop Aligned Polymer Fibres for Heat Transfer Applications". AZoM. (accessed March 01, 2024).

  • Harvard

    Chilton, Alexander. 2014. MIT Researchers Develop Aligned Polymer Fibres for Heat Transfer Applications. AZoM, viewed 01 March 2024,

Tell Us What You Think

Do you have a review, update or anything you would like to add to this news story?

Leave your feedback
Your comment type
Azthena logo powered by Azthena AI

Your AI Assistant finding answers from trusted AZoM content

Your AI Powered Scientific Assistant

Hi, I'm Azthena, you can trust me to find commercial scientific answers from

A few things you need to know before we start. Please read and accept to continue.

  • Use of “Azthena” is subject to the terms and conditions of use as set out by OpenAI.
  • Content provided on any AZoNetwork sites are subject to the site Terms & Conditions and Privacy Policy.
  • Large Language Models can make mistakes. Consider checking important information.

Great. Ask your question.

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.