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Materials & Assembly

Memory Plastic Reverses Shape 250 Times

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Ann R. Thryft
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Re: Smart plastic
Ann R. Thryft   9/16/2013 1:44:55 PM
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Debera, that's an interesting application idea, although to start they'd be very expensive toys/playground equipment!

Debera Harward
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Re: Smart plastic
Debera Harward   9/13/2013 6:42:06 AM
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Thanks Ann, i really like this idea. Definitely technology and advancement is moving so fast that every new invention can be utilized somewhere or the other .According to me this plastic reverse shape can be used in the paly land and fun land for children to fascinate them , in circuses or any such children shows . I have mentioned the usage on very ground scale in future there can be many more usages as well.

Charles Murray
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Re: Beyond 250?
Charles Murray   9/12/2013 5:44:19 PM
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I agree, Greg. Cost effectiveness will be key, especially given the short cycle life. If it can't be re-used thousands of times, the cost will need to be low.

Ann R. Thryft
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Re: Beyond 250?
Ann R. Thryft   9/12/2013 11:55:23 AM
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Thanks, Chuck, for that example. It's always interesting to see what happens to the new materials and devices we report on, and how many of them make it all the way to widespread usage.



Ann R. Thryft
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Re: Beyond 250?
Ann R. Thryft   9/12/2013 11:51:05 AM
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TJ, you might not have asked me for an answer, but generally when a temperature-controlled shape memory plastic stops working, the first thing that happens is it doesn't revert completely to its previous shape. That ability to revert continues to decline, as do the properties of the material such as strength.

vimalkumarp
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Re: Beyond 250?
vimalkumarp   9/12/2013 2:39:03 AM
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@TJM: great thought as on what will happen beyond 250 cycles. This may be of use in medical applications and closed loop control / safety systems.

Greg M. Jung
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Re: Beyond 250?
Greg M. Jung   9/11/2013 10:09:28 PM
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Charles, I agree with you that it is difficult to foresee some of the future uses of new technological developments. (I think this material could possible initiate some).  If this plastic is cost effective and moldable, many new and unique applications will probably arise from its use.

Charles Murray
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Re: Beyond 250?
Charles Murray   9/11/2013 7:33:32 PM
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I'm sure that engineers will find uses for this memory plastic, although it will clearly be limited by the 250 limit on the number of cycles. A few years ago (OK, it was 25 years ago), we did a story about a material with a negative Possion's Ratio -- so the material grew thicker when you stretched it. I remember asking the inventor what the possible uses could be, because I was skeptical about anyone actually needing it. Sure enough, the material is now in broad use, especially in HVAC systems for buildings.

TJ McDermott
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Beyond 250?
TJ McDermott   9/11/2013 1:25:40 PM
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I am curious what happens beyond 250 cycles.  Does the material fatigue and break like any other material?  Does it simply stop responding to temperature changes?  The answers will assuredly impact potential uses of the material.  Ann, those were rhetorical questions. I wasn't posing them to you directly.

Ann R. Thryft
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Re: Smart plastic
Ann R. Thryft   9/11/2013 12:08:14 PM
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Thanks, Rob. I think there's a lot of that going around in several fields and new technologies. I mean your comment "We'll probably see this used in applications we can't even imagine right now."

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