6.21 Reactions of Alkenes with Alkenes: Polymerization.

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Presentation transcript:

6.21 Reactions of Alkenes with Alkenes: Polymerization

cationic polymerization free-radical polymerization coordination polymerization Polymerization of Alkenes

H 2 SO 4 + monomer (C 4 H 8 ) two dimers (C 8 H 16 ) Dimerization of 2-methylpropene (CH 3 ) 2 C CH 2 CH 3 CCH CH 3 C(CH 3 ) 2 CH 3 CCH 2 C CH 3 CH 2 CH 3 Cationic Polymerization

CH 3 CCH 2 C CH H2CH2CH2CH2CC CH 3 C CH 3 + Mechanism of Dimerization

+ CH 3 CCH CH 3 C(CH 3 ) 2 CH 3 CCH 2 C CH 3 CH 2 CH 3 CH 3 CCH 2 C CH 3 + Mechanism of Dimerization

200 °C 2000 atm O 2 peroxidespolyethylene H2CH2CH2CH2C CH 2 Free-Radical Polymerization of Ethylene

..RO.. H2CH2CH2CH2C CH 2 Mechanism

H2CH2CH2CH2C.. RO: Mechanism

H2CH2CH2CH2C CH 2.. RO: Mechanism CH 2 H2CH2CH2CH2C

H2CH2CH2CH2C H2CH2CH2CH2C.. RO: Mechanism

H2CH2CH2CH2C CH 2 H2CH2CH2CH2C.. RO: Mechanism CH 2 H2CH2CH2CH2C

H2CH2CH2CH2C H2CH2CH2CH2C H2CH2CH2CH2C.. RO: Mechanism

H2CH2CH2CH2C CH 2 H2CH2CH2CH2C H2CH2CH2CH2C.. RO: Mechanism CH 2 H2CH2CH2CH2C

polypropylene H2CH2CH2CH2C CHCH 3 CHCHCHCHCHCHCH CH 3 Free-Radical Polymerization of Propene

..RO.. H2CH2CH2CH2C CHCH 3 Mechanism

H2CH2CH2CH2C.. RO: Mechanism

H2CH2CH2CH2C CHCH 3.. RO: Mechanism CHCH 3 H2CH2CH2CH2C

H2CH2CH2CH2C H2CH2CH2CH2C.. RO: Mechanism

H2CH2CH2CH2C CHCH 3 H2CH2CH2CH2C.. RO: Mechanism CHCH 3 H2CH2CH2CH2C

H2CH2CH2CH2C H2CH2CH2CH2C H2CH2CH2CH2C.. RO: Mechanism

H2CH2CH2CH2C CHCH 3 H2CH2CH2CH2C H2CH2CH2CH2C.. RO: Mechanism CHCH 3 H2CH2CH2CH2C

H 2 C=CHCl  polyvinyl chloride H 2 C=CHC 6 H 5  polystyrene F 2 C=CF 2  Teflon Likewise...

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