docharç polyblend
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Practice Test 1
The type of polyethylene that goes into
milk jugs is stronger, stiffer, but more
opaque (less optically clear) than the type
of polyethylene that is used to make film
wrap (greater optical clarity,...
high-res version
3) Property changes
Stiffness (Modulus increases 2,000 fold)
Chemical resistance (cf. 1st stage in dissolution of polymers)
B. The (somewhat) branched less crystalline stuff ?
2. Alkyl groups on Cp ring increase catalyst activity
if they are not too bulky
Bulky alkyl groups and e– withdrawing groups decrease activity.
3. Bulky bridging groups
