Sponsored Links
This presentation is the property of its rightful owner.
1 / 79

第 6 章 离子聚合 PowerPoint PPT Presentation


  • 183 Views
  • Uploaded on
  • Presentation posted in: General

第 6 章 离子聚合. 6 . 2 阴离子聚合. 反应通式:. :阴离子活性种;. : 反离子,一般为金属离子( Metallic Ion )。单体插入离子对引发聚合。. 与阳离子聚合不同,阴离子聚合中,活性中心可以是 自由离子、离子对,甚至是处于缔合状态的阴离子。. 阴离子聚合应用比阳离子多,应用广泛。由于具有活性无終止的特点,可以制备嵌段共聚物。. 1.阴离子聚合单体. 阴离子聚合的单体可以粗分 烯类 和 杂环 阴离子聚合单体必须含有能使链增长活性中心稳定化的 吸电子基团。 带吸电子取代基的烯类单体原则上容易阴离子聚合. 带吸电子取代基的烯类单体

Download Presentation

第 6 章 离子聚合

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


6


6.2

Metallic Ion


1.



-



p-

p-


A

B


C

D

a-


2.


-

1


-

THF

-

-


  • NaNH2KNH2

2


KNa

K Na Li Mg Al

0.8 0.9 1.0 1.2~1.3 1.5

KC NaC LiC MgC AlC


Mg

RMgX

Mg-C


3

R3PR3NROHH2O


3.



aABCD

CD

b

BCD

cCD

dd


4.

  • H+


100%


1956THF

Living Polymerization

100%

Living Polymer

100%

  • THF100


  • Stoichiometric


  • CO2



5.

  • 104107

    kp

    [M] 103 ~ 102 mol / L

    [M] 109 ~ 107 mol / L

    [M] > [M] 104 ~ 107


(1)

:

Rp = kp [M] [M]

kp

[M]

[M] = [ C]

27


Rp = kp [C] [M]

kp

[C]

ln[M0]/[M]=kp[C]t

M0

[C]


(2)


=/n=[M-]/n

[C]

n

n = 2

n = 1

100


StTHF= 1. 06 ~ 1. 12


1

2/

3

4


6.

(1)


P-C+ P-


P-C+ P-

kp

K

Rp = kp [M] [M]



kp[M-]1/2

K


(2)

102103


3

820 kJ/mol


7 .

GPC


StBStBSt

M1M2


6.3


1.


(1)-


-


820kJ / mol

-


p-

(2)


-

(3)


1

2

Lewis

2.


(1)

H2SO4H3PO4HClO4 CF3COOHCCl3COOH

H

  • H


  • XHCl

  • HSO4 H2PO4

  • HClO4CF3COOHCCl3COOH


Lewis

BF3 , AlCl3,SnCl4 , TiCl4, PCl5, ZnCl2

Lewis

(2)Lewis

Lewis


H2OROHHXRCOOH

RXRCOX(RCO)2O

BF3

-


  • ,

    BF3 > AlCl3 > TiCl4 > SnCl4

    BF3

    50 1. 5 1


Rp

,

  • Rp


(3)

I2



3 .

(1)

LewisCRH


:

Ei = 8.4~21 kJ/molEi = 105150 kJ/mol


(2)


  • 3--1-:


(3)





4 .

SnCl4

,


[c]

[RH]

[M]


Rp




5.

  • ,

(1)


(2)

  • Cl

I2SnCl4-H2OHClO41,2 -250.0030.421.70 L/mol.s


(3)


6.4

Rp

Lewis



f

[M]Rp

RpXn

CS2SO2CO2

(THF)


50 80

70 100

Rp [I] 1/2

Rp [C]


DPPH

CO2


  • Login