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ŵ  - ڸ ϸ

 

 

µ (glass transition temperature), Tg

 

 

µ (first-order transition temperature)

 

 

µ (second-order transition temperature)

 

 

ȭ

 

 

 

̿µ, Tg ġ

 

   (1). 罽 ġȯ ũ

   (2). ġȯ ؼ

   (3). Ұ

   (4). ,

 

 

µ ǹ̿

 

 

ǥ 1. ڵ µ (Tg)

 

ܷü ̸                                       ݺ                  Tg()

polyethylene

 -20

polypropylene

   5

poly(1-butene)

 

  -24

poly(1-pentene)

 -40

poly(1-hexene)

 -50

poly(1-heptene)

 -31

poly(1-decene)

 -41

poly(1-dodecene)

  -6

poly(3-methyl-1-butene)

 50

poly(4-methyl-1-pentene)

 29

poly(3,3-dimethyl-1-butene)

 64

poly(5-methyl-1-hexene)

 -14

poly(4,4-dimethyl-1-pentene)

 59

poly(vinyl n-butyl ether)

 -55

poly(vinyl t-butyl ether)

 88

poly(vinyl chloride)

 81

poly(vinyl alcohol)

 85

polystyrene

 100

poly(2-vinylnaphthalene)

 151

poly(4-vinylpyridine)

 142

 

 

ǥ 2. ü µ .

 

 

    

                    Tg ()

ŵŹƽ,   Źƽ,    ̼Źƽ

 poly(methyl methacrylate)

   105             105          38

 poly(ethyl methacrylate)

    65               65          12

 poly(t-butyl methacrylate)

   114             118           7

 polypropyleneb

    -4               -6        -18

 polystyrene

  100c            99c

  

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