The he said about the containers used for holding these cookies are made of plastics and polymers, mostly is made of polystyrene or polypropylene. Ok that is not the funny part lah. I think he is a rather generous project supervisor, he got treat his mentees dinner by the way.
There is a part which he make some mistakes about Chemistry lah. He said that the fluoride group is very electronegative and therefore electron withdrawing... I think he was right that the benzene ring does stabilizes the free radicals and the anions, the benzene ring does reduces the electron density around the free radical stabilizing and its also a bulky group it so producing the head to tail polymer chain . Ok the methyl group is electron donating (actually electron withdrawing) so will produce a polymer with head to head polymerization. Haha, I was wondering what he actually mean was. My classmate observed Dr Tong's mistake and point out to him, and he praise her for being very observent. Electron donating means electropositive and electron withdrawing means electronegative. Even my friend joke to me about him, saying my "favourite lecturer" say wrong things during lecture, say fluorine is very electronegetive so is an electron donating group. For more information about his lecture please see below.
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