DSC

MECE 2340 Engineering Materials - DSC Exam and Quiz Questions.
Robert Jones, Ph.D.
Edited By: Jazmin Ley

[@applytalkshow]

I am a DSC instrument user and trainer. I highly recommend this video, if you are about to use DSC for polymer studies. Neglect the video quality! believe me, it is worth it! Thank you for sharing this video!

[@solocod4993]

Can i have more source to interpret the DSC data.

[@mariamtemitopearowona9514]

Thank you

[@prashantadki4046]

This video is the reason I could quickly and easily understand DSC for my masters project, only lasting for 3 months. Saved my thesis, to be honest!

[@mdsakinulislam2854]

Excellent discussion on TGA and DSC fundamentals. Thanks a lot to Robert Jones !!!

[@sarveshkumargupta6988]

Such a nice lecture, it clears many doubts which were in my mind.

[@famasymas7]

Very good video. Thanks for the explanation Dr. Jones.

[@chetanswaroop3598]

Very informative!! Many thanks for such a valuable presentation.

[@Organicarivu]

This is very much helpful in learning DSC... This is really awesome video for beginners.

[@bina5580]

Thank you so much ! That was like 2 hrs worth of 20 mins :D

[@muhammadumerfarooq2895]

Excellent and amazing teaching style...Thanks sir

[@JadAzido]

Great video! Regardless of the 3 frames per second framerate

[@mustikaselaseh285]

I've been working with dsc for few years.. you got all the points there. It could saved me years of learning by experience if I get to watch this video earlier. Thank u.

[@solocod4993]

Can I have more sources to interpret DSC data

[@aleisha8757]

Wow, probably one of the most useful lectures i've come cross. Thank you very much!

[@psubbareddy1959]

Hello can explain

[@youcef4172]

Thanks a lot, it's a really helpful video

[@sivashankari8118]

Thank you for the clear explanation.. Helped a lot

[@luannamoura5428]

great video! super simple and clear!

[@shimonamalik2847]

this video was perfect! helped so much

[@Manitham-vk8er]

Thank you, you covered the basic and important points for beginners.....

[@preciousamaechi689]

My notes has become ever full and brimming with information. I think anyone watching this should do so while taking notes.

[@jingyaogan3033]

Very good video and make me get better understanding of DSC

[@sukantadas5481]

Is it heat release of the sample or net heat supply to the sample in the y-axis ?

[@avaes5260]

amazing, thank you so much

[@douglasmonteiro4203]

You helped a lot. Thanks

[@dineshmule6986]

Excellent explanation. Really helpful. 💯 ❤️

[@mustafayildiz4943]

Sis kebap structure, what a creative term :) Great video, thanks a lot.

[@al-ajalyaimamas6679]

Excellent video

[@Phoenix-qu8uj]

Excellent tutorial! Thanks for your help

[@shamitakohli6443]

Awesome Sir, it helped a lot

[@stevearaujo6543]

great presentation

[@A_Box]

Question here: How come that the signal is recorded in units of energy per mass per degree per second [J/m°Cs=W/m°C] and we integrate that with respect to temperature [°C] we somehow end up with just energy per mass [J/m]?

[@LM53180]

great video

[@nagellaraveendrababu7883]

very insightful.....!! Thank you

[@Danial-mm6ze]

please can you explain the TGA analysis especially the weight loss of samples

[@ayazmubaraka2316]

I etched this videos many times. Every time I learned domeo

[@ankitdere9173]

Hi Robert I have got very strange type of curves for Cashewnut shell phenolic resin. I could not find out curing temperature.

[@yashodiptakore7599]

Good explanation

[@aslamsajad1112]

Thanks a lot for this…🤩

[@mezbahuddin1402]

Would you please explain the differences between DTG and DTA?

[@AliUchiha94]

thanks alot

[@gn6675]

thank you

[@garciansmith1460]

I'm a little confused at around the 6 minute mark. Why would a polymer crystallize as you are heating it up? Don't thinks become more and more amorphous/fluid-like as you heat them up?

[@harishthakur5124]

Best teacher

[@Bibidance2013]

very helpful vídeo. but what to do when we need to only use the first run? Due to acess the actual TG of a composite (to realise the degree of cure of a process) and in the first run we have a thermogram where is difficult to find the TG.

[@melearn-utrgvley2252]

There are a couple of possible issues that I can think of, and probably several more that are not. If the degree of cure is too low, your Tg may be below your minimum temperature of the scan. If you have a high fiber/filler volume fraction, the Tg transition can appear pretty weak and you may need to play with your vertical scale. Finally, significant residual cure may obscure the Tg. It isn’t always nice and separated from the Tg like I show in the sketches. If you had a reference scan of a fully cured system and a completely uncured system, you could compare to those. TA instruments has a bunch of helpful tech and application notes on their website and if memory serves, one is on measuring degree of cure in the DSC. Hope one of those helps… Dr Robert E. Jones Professor Department of Mechanical Engineering [phone] [e-mail] Brownsville • Edinburg • Harlingen

[@LM53180]

Hi there, yes TA tech tips are very helpful. If you have problems seeing a Tg, you can increase the heating rate, according to ASTM this may help. Also, you can use modulated DSC to separate the reversible heat flow associated with Tg.

[@Bibidance2013]

At our company we follow the ISO 11357. In this standard, heating rate defined is 20 K/min.

[@Bibidance2013]

I really appreciate your time, thank you. I think that in my case, it can be related with the high fiber volume of samples. Also, most of the times I cannot get a clean tansition, as there are several effects affecting the graph. There is no smooth line.. production department not always understands when we can not give them a temperature value as we can not read TG.

[@iftekharahmed5372]

Excellent

[@mehtashirley]

amazing

[@KhaLed-pb4pu]

Thanks, but the crystallisation peak example was not very clear... Could you give an example? You said it goes from an amorphous to a semi-crystalling material with increasing temperature... Does this mean that when heat is applied to starch in its semi-crystalline structure, we will have an EXOthermic reaction??

[@ncsctsr]

Respected sir I have a DSC thermogram of maltose monohydrate having one endothermic peak just below the melting point. Can please explain what this peak indicate?

[@user-yf1xn7xq3z]

very nice

[@viscerataken]

This is very helpful. I come across with this video because I have some doubts. Would be possible to contact you to ask you some staffs? Thanks a lot in advance

[@melearn-utrgvley2252]

Yes you can contact us at [e-mail].

[@cesnopereiralorenzodossant6180]

Let me ask, can i transform my result dsc in heat flow (W/g) and temperature to calculated about enthalphy of %cristanility? i have a problem because in my result i dont know about a mass change, please help me thank you

[@lf198]

why is the quality so good?

[@debarshinath9930]

//Can exothermic peak denote melting point?? please help

[@jaj2629]

good video

[@uceee1]

03:22 Isnt that the other way around? Mobility of molecules increases with higher temp rather than decreases?

[@artimis15]

He was saying that the temperature of the glass transition increases if it is harder to move the molecules, because there is more energy needed for the transition. If the transition is at a lower temperature that means there is less energy needed for the transition.

[@aaa7724]

Hello. Dr Jones. Is there any data base about materials linked with their calorimetry? Currently, I am working to idenfify unknowledge materials using DSC techniques. Thank you in advance

[@LM53180]

Hi, you can can check the polymer handbook, which is a comprehensive database that gives information on mechanical properties, thermal properties, electrical properties, and chemical properties.

[@user-uf4km6rv5o]

Teacher you have a DSC in French!!

[@tylerpennell434]

Definitely not deep stone crypt... move along.