User:Matt Hartings/Notebook/NIST/2017/01/27

Project name

Comments

Zeeshan sent me some samples to run on the DSC. These include waxes and several polymers.

Samples

The following include sample names, pan masses, sample masses, and DSC sample numbers. Aluminum Tzero pans from TA instruments were used. No caps or seals were used.

Sample Name	Pan Mass (mg)	Sample Mass (mg)	DSC Sample #
135 Wax	42.42	2.60	26
79 Wax	42.60	4.70	27
52 Wax	42.97	6.13	28
107 Wax	42.36	1.77	29
93 Wax	42.65	6.15	30
121 Wax	42.40	1.95	31
66 Wax	42.47	1.93	32
Carboxy PNI-PAm	43.01	1.67	33
Thymine	42.86	3.33	34
PNI-PAm NH2	42.80	1.60	35
PNI-PAm COOH	42.64	2.76	36
PNI-PAm	42.25	1.41	37

Note: The mass of the 135 wax might be a little low. the balance was doing something funny. Check this later.

DSC run parameters

Equilibrate at -20 C
Isothermal for 2 minutes
Ramp to 200 C at 10 C/min
Isothermal for 2 minutes
Ramp to -20 at 10 C/min
Repeat Step 2, 2 times

Partial Results

The results shown below highlight the observed melting points. Note: Melting points were only observed in the first heating scans for each sample. They were not reversible. Also, for the PNI PAm variants, glass transitions were observed at higher temperatures (130-160) but are not listed/shown here. In the graphs below, the number in parentheses is the measured melting point, determined from the derivative graph [d(mW)/dT], which aren't shown here.