Page 47 - Academic Press Encyclopedia of Physical Science and Technology 3rd Polymer

P1: GQT/LBX P2: GQT/MBQ QC: FYD Final Pages
Encyclopedia of Physical Science and Technology EN008C-602 July 25, 2001 20:31

862 Macromolecules, Structure

TABLE I (Continued)
◦
◦
Polymer Chain unit T m ( C) a T g ( C) b
Polystyrene
( CH CH 2 ( n
Atactic 100
Isotactic 240 100

Poly(styrene oxide) ( CH CH 2 O n ( 149 37

Polyphenylene sulfide
S
n
Polysulfone CH 3 O 219
C O S O
n
O
CH 3
Poly(tetrafluoroethylene) ( CF 2 CF 2 n ( 327
O H H O
Polyurethane

4,4 -diphenylmethane ( O C N CH 2 N C O ( CH 2 4 n ((
Diisocyanate (MDI)
Hard segment chain—
extended with butanediol

Toluene diisocyanate O H H O
Hard segment ( C N N C O n (

CH 3
Polyol soft segment CH 3
( CH 2 CH 2 O ( n ( CHCH 2 O ( m ( CH 2 CH 2 O n (
/ 2 / 2
Poly(vinyl acetate) ( CH CH 2 ( n 28
OCOCH 3
Poly(vinyl alcohol) ( CH CH 2 ( n 258 85
OH
Poly(vinyl chloride) ( CH CH 2 ( n 81
Cl
Poly(vinylidene chloride) ( CCl 2 CH 2 n ( 190
Poly(vinyl fluoride) ( CH CH 2 n ( 200 −20(?)
F
Poly(vinylidene fluoride) ( CF 2 CH 2 n ( 171 −45
Poly(vinylpyrrolidone) ( CH CH 2 n (
N
O

Urea-formaldehyde O
( N C N CH 2 (
CH 2 (
a
Melting temperature.
b
Glass transition.