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Need help with polyimerization question: How does inhibition of styrene polymerization work with benzoquinone? by metalfront in ChemicalEngineering

[–]noswad4 0 points1 point  (0 children)

My companies sagely r&d director. I think if you try to figure out the mechanism and push the electrons around the molecule you will find that electrons can be considered delocalized throughout the whole molecule (Which is why the book is probably calling it a stable radical) and the only opportunity for a moiety to pop off is a H. This is specifically regarding the hydroquinone. H radical is such a small little reactive atom, it will immediately quench any other radical that comes close to bumping into.

Honestly the book rings incorrect. Radicals by their very nature aren't considered stable. If radicals exist in any appreciable amount the polymerization should be able to continue. The only way you will stop the chain reaction is with termination.

Maybe the quinone radical is stable and has a significantly lower Gibbs energy than the oligimeric radical but I would be surprised... I looked it up and PBQ Gibbs of formation is -150 kJ/mol vs. 215 kJ/mol. For styrene. So I guess this could also be a possibility. It could just make the forward reaction endergonic.

Go to office hours and see what your prof says and report back.

Need help with polyimerization question: How does inhibition of styrene polymerization work with benzoquinone? by metalfront in ChemicalEngineering

[–]noswad4 2 points3 points  (0 children)

You are correct. Quinones soak up radicals which are needed to sustain polymerization. They are consumed in the process. Pbq, thq, hq, and mtbhq all work the same way. Peroxides create radicals and are used as initiators. They are called catalyst in industry but this is a misnomer as they are consumed.

As I understand it, the quinone typically releases an H radical from the alcohol group that is really fast reacting and terminates another radical. The quinone itself does not stay a radical.

Replace MoBo or MoBo and CPU? by noswad4 in buildapc

[–]noswad4[S] 0 points1 point  (0 children)

Unfortunately, no. I don't have one to test them in. I can't imagine that 3/3 or the GPUs are shot vs. the MoBo.

Replace just the motherboard, or motherboard and CPU? by [deleted] in buildapc

[–]noswad4 0 points1 point  (0 children)

Cards were a generous gift from a coworker. I dont need a new card I need a mobo.

stockAday: Honeywell or Moneypit? $HON by shane_stockflare in investing

[–]noswad4 1 point2 points  (0 children)

I would argue that Emerson Electric is much more of a competitor on the automation and controls front, they operate DeltaV, Provox, Fisher Controls, MicroMotion, Novaspect Consulting. In fact, I would say that they rival $ROK. Honeywell's major product in the ACS division is its distributed control system, which I believe Emerson has the major market share of. $ROK operates more on the PLC market, which many companies have been slowly turning away from for a more integrated DCS solution which lends itself more easily to 'Big Data' and 'IoT'.

LPT: Have a friend call up your ex-employers pretending to be a potential employer to see what they say about you by [deleted] in LifeProTips

[–]noswad4 1 point2 points  (0 children)

Everyone is giving you the black-and-white, but truthfully it is grey. If they give a negative review and cite specific examples, like he consistently clocked in late and they have the time cards to probe it, then it wouldn't be considered illegal. If they are just saying you are a shitty person and like to sniff farts, then they could be exposing them or their company to a slander or defamation suit, which can be difficult to prove, especially if you are not in a single party consent state (only one person has to give permission to record a conversation). So the answer is yes and no, but practically no.

This just happened today by [deleted] in fffffffuuuuuuuuuuuu

[–]noswad4 2 points3 points  (0 children)

You are fucking awesome.

Turns out I've been playing Dishonored all wrong... by LtThunderpants in gaming

[–]noswad4 0 points1 point  (0 children)

Have as much fun playing how you want, then watch all of the endings on youtube. Problem solved.

Fuck. You. by CnHasDox in AdviceAnimals

[–]noswad4 0 points1 point  (0 children)

I, too, have this. If only it worked for galleries.

Fuck. You. by CnHasDox in AdviceAnimals

[–]noswad4 3 points4 points  (0 children)

Websense sometimes makes nosense.

Everyone who comes into my room: "What is that? Some kind of sword-gun?" by sahkuh in gaming

[–]noswad4 0 points1 point  (0 children)

I got the same props at Comicon last year, 45USD for the buster and gunblade. They are not stainless, just nickel plated. They do however work reasonably well when sharpened. I split quite a few pumpkins last Halloween (I was Squall).

What is a total lie you some how got away with? by DribDrubs in AskReddit

[–]noswad4 0 points1 point  (0 children)

My College roommates thought I was colorblind for two years.