Dr. Williams performs applied research in precision industrial cleaning and spectroscopy
This page contains individual blog posts on nearly every project he has performed or paper he has published.
Spectrum of a Particle in a 1D Box
DW takes the Particle in a Box problem all the way to the simulated spectrum with a transition equation and structural constants. See how.
Fall Cleaning
Cleaning is critical for the protection of optical surfaces and other high-value parts.
Brainstorm Session on 3D Printer Waste
DW asks the readers to suggest uses for 3D printer rafts and fences.
Custom Solvent Blending Using the Hansen Solubility Parameters
DW creates a solvent blend to strip old, oxidized paint.
Contact Angle Standards and Measurement System Evaluation
DW describes the standardization of contact angle measurement for training new workers.
Hansen Solubility Parameters via QSPR
DW describes a QSPR model for determining the HSPs of explosives using Gaussian calculations.
Solubility Spheres
Hansen Solubility Parameters are determined for the high explosive hexanitrostilbene.
Surface Tension and Density Determination
DW describes the creation of a digitized Du Nuoy Ring Tensiometer.
Chemically-Resistant Glove Selection
DW describes the process for using the Hansen Solubility Parameters to select safe chemically resistant gloves.
Solvent Substitution – Part 2
DW describes the process of solvent substitution using cleaning performance verification.
Solvent Substitution – Part 1
DW describes the process of solvent substitution using cleaning performance verification.
PChem4all - Dr. Williams' Science Blog 
Respected Professor,
Good morning professor, first of I would like to thanks a lot professor. Professor I am pursuing Ph.D. in Material Science(polymer synthesis). I would like to ask you, which things do i need to more understand in polymer synthesis?and also If you don’t mind could you send me please Hansen Solubility Parameter excel sheet. Here, i will not take more time of you professor. I hope you understand and again thank you very much for giving us lots of information.
Thanks and regards,
Sincerely,
Sagar Pandurang Kumbhar.
Here is a link (http://bit.ly/HSPExcel) you can use to download the Excel Workbook. I am pleased to help. -DW
Hi Dr. Darren, it’s really great and awesome in your youtube classes. These are the best courses I have taken although I understand it well that my language is Arabic and French. I am Dr in chemistry (Tunisia Country) I would like you to help me with courses and exercises on group theory in chemistry. THANK YOU
I am so glad you liked the Group Theory videos and that they helped you. I am amazed that you can follow them in English even though your first languages are French and Arabic. Does YouTube do a good job translating my videos into French or Arabic? If so, that is awesome!