화학  ≫ 온도,  pH

탄소수 & m.p, b.p

- Make big : 모노머 -> 폴리머 : mp,bp증가, 용해도 감소

C1~C4    : 20'C, gas
C5~C9    : 70'C - Naphtha, chemicals
C5~C10   : 120'C - Patrol, gasoline
C10~C16 : 170'C - jet fuel, paraffin
C14~C20 : 270'C - diesel fuel
C20~C50 :          - lubricating oil, wax
C20~C70 : 600'C   - fuels for ship
> C70      :            - bitumen for load