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Subject: Re: [DCHAS-L] Scientist says some pollution is good for you - a disputed claim Trump's EPA has embraced
Date: Monday, February 25, 2019 at 1:04:39 PM
Author: Alan Hall <oldeddoc**At_Symbol_Here**GMAIL.COM> 		Next by Date:
Subject: Re: [DCHAS-L] Scientist says some pollution is good for you - a disputed claim Trump's EPA has embraced
Date: Mon, 25 Feb 2019 18:57:19 +0000
Author: Monona Rossol

From: Monona Rossol <0000030664c37427-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU>
Subject: Re: [DCHAS-L] polymer curing question
Date: Mon, 25 Feb 2019 18:24:01 +0000
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: 2080533083.5275099.1551119041134**At_Symbol_Here**mail.yahoo.com
In-Reply-To


And don't forget a TLV-TWA of 5 ppm.  

Monona Rossol, ACTS NYC


-----Original Message-----
From: Ellen M. Sweet <ems325**At_Symbol_Here**CORNELL.EDU>
To: DCHAS-L <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Sent: Mon, Feb 25, 2019 10:21 am
Subject: [DCHAS-L] polymer curing question

Hi everyone,
I have a question from one of our researchers here at Cornell. Here's the background:
 
"The process involves synthesizing and curing a novel polymer, PDMS based PU, onto plastic "coupons" which will have DFM evaporating off.
The cure process is intended to have the polymer form onto the surface of the coupons in a thin coat and make the surface non-binding."
 
Our question is how to do this safely? DMF has a flash point of 58 =B0C and a vapor density of 2.52.
A known method for this curing process is to place the plastic coupons into a flammable oven that is under vacuum and flushed with nitrogen.
 
Can anyone suggest another method that doesn't involve the use of an oven like this? The group would have to purchase one to the tune of $50,000!
 
Thanks, Ellen
 
 
Ellen Sweet
Laboratory Ventilation Specialist
Department of Environmental Health and Safety, Cornell University
American Chemical Society, Division of Chemical Health and Safety
315-730-8896
 
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