1) Which of the following polymers is likely to exhibit elastomeric properties a

Question

1) Which of the following polymers is likely to exhibit elastomeric properties at temperatures indicated:

(a) lightly crosslinked cis-polyisoprene at 25C

(b) Heavily crosslinked polychloroprene at 25C

(c) lightly crosslinked high density polyethylene at -60C

(d) lightly crosslinked polychloroprene at -60C

(e) lightly crosslinked polyimide at 350C.

2) Describe a) which is likely to crystallize more easily in each case. Indicate if no difference b) which is likely to have a higher Tg ?

a)linear PE with a MW = 100,000 g/mol OR branched PE with a MW = 500,000 g/mol

b)PVF or PVDF

c)Nylon 6,6 or Kevlar

Explanation / Answer

Correct answer: Option (a): Lightly cross linked cis polyisoprene at 25°C

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