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(Phys Org2)   New plastic creates a cup that can hold boiling liquids. McDonald's legal team on high alert   (phys.org) divider line
    More: Spiffy, Materials science, Water, Polymer, Crystal, Polymers, lab of Dr. Shi-Qing Wang, Cooking, Polymer chemistry  
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435 clicks; posted to STEM » on 04 Dec 2020 at 11:20 AM (7 weeks ago)   |   Favorite    |   share:  Share on Twitter share via Email Share on Facebook



13 Comments     (+0 »)
 
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ZAZ [TotalFark]
2020-12-04 11:00:11 AM  
We've had plastic containers for boiling water for a long time. What McDonald's needs is a lid that stays on.
 
2020-12-04 11:11:32 AM  
Take the top off a full bottle of water and throw it in a hot campfire so it stays upright.. the boiling water will keep the plastic from melting fully for as long as it takes to boil it off.

I mean don't burn plastic, folks.
 
2020-12-04 11:48:07 AM  
Wow, that's great. Now you all can have something even more indestructible to throw in the trash, for your convenience.

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Totally YOURS
 
2020-12-04 12:38:26 PM  

Tr0mBoNe: Take the top off a full bottle of water and throw it in a hot campfire so it stays upright.. the boiling water will keep the plastic from melting fully for as long as it takes to boil it off.

I mean don't burn plastic, folks.


I've done that with Styrofoam cups as well, which has the added benefit of removing the hair from the back of your hand.
 
2020-12-04 1:13:09 PM  

cryinoutloud: Wow, that's great. Now you all can have something even more indestructible to throw in the trash, for your convenience.

[Fark user image 277x182]

Totally YOURS


That's what I imagine a sea turtle that is grocery shopping might look like
 
2020-12-04 1:27:54 PM  
CSB: I ate the McDonald's where the coffee incident happened.  In a pretty sketchy part of town (the "War Zone").  They were shooing off a homeless guy when I arrived.
 
2020-12-04 1:35:26 PM  
In boy scouts we had to boil water in paper bags over a fire.
You can do it in plastic, but it tastes horrible and is probably not the best for you.

Not about to RTFA, but I don't know what would be newsworthy about plastic that can handle temps of 100c
 
2020-12-04 4:14:31 PM  
Should have specified that it was PLA, since - as mentioned above - many plastics can withstand those temperatures, but PLA generally can't
 
2020-12-04 5:15:20 PM  

the_sidewinder: Should have specified that it was PLA, since - as mentioned above - many plastics can withstand those temperatures, but PLA generally can't


But then maybe we wouldn't have read the article.

Oh wait did anybody read the article?

Hahaha just kidding.

I was thinking when I read the headline, that polypropylene doesn't melt until around 130 Celsius so it holds boiling water just fine anyways.

Much cooler than it is a fully compostable plastic, or at least that is the claim.
 
2020-12-04 7:22:56 PM  

Ambitwistor: CSB: I ate the McDonald's where the coffee incident happened.  In a pretty sketchy part of town (the "War Zone").  They were shooing off a homeless guy when I arrived.


You ate the whole building, equipment and all? Did they evacuate the building first?
 
2020-12-04 8:21:27 PM  

Ambitwistor: CSB: I ate the McDonald's where the coffee incident happened.  In a pretty sketchy part of town (the "War Zone").  They were shooing off a homeless guy when I arrived.


Gibson road in ABQ?  That was my McDs when I was stationed there. Last time I passed through there I had to stop by. I was surprised a large coffee is not 1 dollar there, like I am accustomed to where I live now
 
2020-12-04 8:33:15 PM  

the_sidewinder: Should have specified that it was PLA, since - as mentioned above - many plastics can withstand those temperatures, but PLA generally can't


Yeah, back in '89-90 when I was stationed in Okinawa, I perfected my Ramen skills using a Solo cup, boiling water (from a tea pot/hot plate) and my freezer (our barracks room was "shift work" - we were allowed a full size fridge and they ignored the cooking equipment we kept in our lockers). The Solo cup handled boiling water just fine, not even deforming at all.
 
2020-12-05 8:26:32 AM  

NearCanuck: Much cooler than it is a fully compostable plastic, or at least that is the claim.


PLA is a bit of a weird one. It does biodegrade, but needs sustained elevated temperatures of ~55C to readily do so. However outside of this, it seems like it should take about 80 years to decompose in the wild, which is a hell of a lot better than most plastics, and there is more work being done to reduce that number, as additives like PHA (another bioplastic, this one is produced by bacteria as an energy store) or nano-titania (TiO2) help speed decomposition
 
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