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Subject:
From:
Yuan-chia Joyce Koo <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Yuan-chia Joyce Koo <[log in to unmask]>
Date:
Mon, 19 Sep 2016 20:00:30 -0400
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in addition, the tma also more sensitive to degree of cure - you got  
from delta Tg, and you can see directly from the curve what un-cured  
substance going to impact on CTE.  however it is limited if you have  
flex or some spongy material.  As for the probe breaking- if you know  
you have to change probe yourself, it most likely only going to  
break  once... maximum 2x (so far the record still holds in the lab I  
worked before... not in Bev's lab, just for clarity).  agree, sample  
prep is major pain.  but you can't get CTE otherwise... CTE  is too  
important to ignore from design/reliability point of stand.   
(calibration is another pain.triple stack with ice/In sandwich with  
ceramic plate.. like eating ice cream with split headache)...
         jk
On Sep 19, 2016, at 7:40 PM, Yuan-chia Joyce Koo wrote:

> TMA.  direct measure of Tg, CTE those are critical for reliability  
> and material identification.  that is assume for electronic   
> application (packaging).
> second runner off: DSC, for Tg and exotherm of polymeric material  
> (looking for degradation or Tm, and you might be able to use good  
> balance to measure the left over  material - sort of Tga with some  
> kind of temp info).
> my 1.4 cents.
>      jk
> On Sep 19, 2016, at 5:04 PM, Bev Christian wrote:
>
>> TechNetters,
>> If you had the choice of getting ONE of:
>> 1) TMA
>> 2) DMA
>> 3) DSC
>>
>> And $ was not an issue, which would you chose and WHY?  Please, no  
>> "it
>> depends" answers and no, you can't throw TGA into the mix.
>>
>> Regards,
>> Bev
>

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