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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