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第一章 高分子链的结构 PowerPoint PPT Presentation


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第一章 高分子链的结构. 桂林工学院材料与化学工程系 高分子材料与工程专业 彭锦雯. 本章提要. 教学内容 :高聚物结构的特点与层次、一级结构、二级结构、过程结构、远程结构;结构单元的化学组成、链接结构、支化与交联,共聚物结构,构型,内旋转构象、柔顺性;高分子链的构象统计:均方末端距,均方末端距 的几何计算方法和统计计算方法、均方旋转半径。 基本要求 :掌握高分子链结构的层次关系,掌握过程结构、远程结构的含义和具体内容,了解均方末端距 及几何计算方法和统计计算方法。 重点难点 :构型、内旋转构象、柔顺性、均方末端距及几何计算方法和统计计算方法。. 本章目录.

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第一章 高分子链的结构

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  • 1.1

    1.1.1

    1.1.2

    1.1.3

    1.1.4

  • 1.2

    1.2.1

    1.2.2

    1.2.3


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1 1 or

1.1 or

(1).

(2).

(3). +

(4).

(5).


1 1 1

1.1.1

1. C

~~~~~~C-C-C-C-C-C-C-C~~~~~~~

PEPSPPPVC


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2. CONS

~~~~~C-C-O-NSSi-C~~~

666PET


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3. Si P B

~~~~~Si-OPAlTi)~~~~


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4.


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------

  • 1POM

  • 2PCPC


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PEPPPS

  • PE


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PE

  • PEHDPELPPE

    LDPE HPPE

    PE


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  • Ultra-high molecular weight polyethylene UHMWPE

Hip and knee total joint replacements are shown as illustrations on this skeleton.


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  • PP


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  • PS


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  • PVC


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  • PMMA


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  • PMMA


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  • PTEFTeflon


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  • PAN


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  • PET


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  • PA6666

  • PA66


Carothers

Carothers

  • 1924

  • 19289193566,

  • 1936,6070

  • 1937429 Nobel

W. H. Carothers

(1896-1937)

DuPon


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  • PC

PC

PC

PC


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  • PPO

+

=

HIPS


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PI


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  • PIP


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  • PB


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  • PIB


1 1 2 configuration

1.1.2 Configuration

  • 1.

  • 2.

  • 3.


1 1 2 1

1.1.2.1

  • C*C

  • C

CCCC


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C

  • C

CH2C HR C C


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C

Isotactic

Syndiotactic

Atactic


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CCC.


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APP

IPP

175


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  • 1

  • 2


1 1 2 2

1.1.2.2

  • 1,4


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  • 8.1A

    ~30

4.7A

~70


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Tm() Tg()

1,4 1,4 1,4 1,4

30 70 70 60

2 148 108 80

A30B70 AB

ACis-BTrans-

ATrans-BCis-


1 1 2 3

1.1.2.3 ------

  • ---


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1,2

3,4

1,4


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  • X

  • NMR

  • IR


1 1 3

1.1.3

  • 1.

  • 2.


1 1 3 1

1.1.3.1


1 1 3 2

1.1.3.2

  • PE

HPPELDPE HPPELDPE

Zigler

,


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LDPE

0.910.94

105

6070%

HDPE

0.950.97

135

95%

  • PEPE

0.95-1.40 ------ -------


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1 1 3 3

1.1.3.3


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  • Mc


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  • ------.

  • PEPE


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  • PVCPS


1 1 4

1.1.4

1.

2. AB

ABBABAAABA

AAAAABBBBBAAAAAAABBB

ABABABABAB

AAAAAAAAAAAAAAA

B B

B B

B


1 1 4 1 random

1.1.4.1random

  • ABBABAAABA

  • 1 PEPP

    2 PTFE


1 1 4 2 block

1.1.4.2 block

  • AAAAABBBBBAAAAAAABBB

  • SBS

  • SBS120PSPSPBSBSPS


Thermoplastic elastomer tpe

(thermoplastic elastomer, TPE)

  • SBSPBPSPBPSthermoplasticSBS


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  • SBSBSB?

    SBSPBPS

    BSBSBSPSPB


1 1 4 3 alternating

1.1.4.3 alternating

  • ABABABABAB

  • 1. PMMAPS

    2. MMA+S

    3. S+AN


1 1 4 4 graft

1.1.4.4 graft

  • AAAAAAAAAAAAA

    B B

    B B

    B

  • ABSacrylonitrile-butadiene-styrene


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  • ABS

  • ABSCN


1 2 conformation

1.2 Conformation

  • CCCOCN

C-C


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  • C-CCC-H60

T

C


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0 60 120 180 240 300 360

()

  • 0120240360

  • 60180300


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G

G


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  • CC-CC-C10928

  • 12-


1 2 1

i+1

i

1.2.1

  • PEPPPS100%PB75%

  • C-CC-C

C-C

(Segment)


Segment

(Segment)

  • i+1i


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------,Why?

  • ------


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------


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  • C


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1 2 2

1.2.2

  • 5

  • C-C


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  • 1.

    2.


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1

C-CPEPP


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C-OC-NSi-O

ONC Si-O-SiC-C-C SiO>CO>CC


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*


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p


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O>S > >

>> CH2 >

>> > CCCC


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2


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.

.

3:


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  • 4

  • 2%3%30%


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5

6

PE


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7

<<>PE

1

2

3


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  • 8

  • PS1001,4-120


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-68 -83 -108

-123 220 10

87 104 145 100


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150 192 -70

-19 -50

-20 208


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1

  • -83150220


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2

-68 -108


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3

  • -68 10 100

    192208


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4

  • -2087145


1 2 3

1.2.3

:


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.


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Z i


1 2 3 1

1.2.3.1

nl


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2.

nl

C-C =10928


1 2 3 2

1.2.3.2

1.


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2.


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3.


1 2 3 3

1.2.3.3

1b:b

2:


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3:

4


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AMn


1 2 3 4

1.2.3.4

  • =


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  • E

    P

    E P


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