Документ взят из кэша поисковой машины. Адрес оригинального документа : http://polly.phys.msu.ru/ru/seminar/vms/25092001/seminar250901.pdf Дата изменения: Wed Oct 3 00:00:00 2001 Дата индексирования: Mon Oct 1 22:09:45 2012 Кодировка:

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. . , E. . , M. . , . . , . .
. . . , . 29, , 119991

: , - ( ). : 1. , ; 2. (, , ) ( ). 3. , in situ ­ , . __________________________________________________________ 25 2001,
_____________________________________

(e-mail: antipov@ips.ac.ru)
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The Scheme of the Structure of Layered Silicate - SodiumMonmorillonite
oxygen Al (Fe,Mg,Li) Si

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Interlayer distances (nm) measured on basal reflection (hkl) on the Xray patterns (reflection mode) of pure clay and clay modified by organic molecules.
Sample

hkl 001 002 003 004 005 006 007 008

Pure Clay 1,25/1,78 0,63/0,89 0,41/0,60 0,31/0,45 /0,36 /0,30

Clay 1 3,11/3,68 2,07/2,21 1,26/1,36 0,91/1,02 0,51/0,56 0,36/0,49 0,32/0,37 0,30/0,31

Clay 2 1,75/1,75 0,88/0,88 0,58/0,58 0,35/0,35

Clay 3 1,89/3,80 0,95/2,10 0,59/1,00 0,36/0,37 /0,27 /0,22

numerator ­ original clay denominator ­ clay saturated with glycerin
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WAXS-Data for Initial and Modified Clay Powders at 20 oC
500

400

Intensity, ar. un.

300

pure clay clay/long aliphatic chain clay/aliphatic carboxilic acid clay/aliphatic alcohol

200

100

0 0 10 20 30 40

2 theta, degree

40000

30000

Intensity, ar. un.

20000

pure clay clay/long aliphatic chain clay/aliphatic carboxilic acid clay/aliphatic alcohol

10000

0 0 2 4 6 8 10 12 14

2 theta, degree


WAXS-Data for Initial and Modified Clay Powders at 20 oC

500

400

Intensity, ar. un.

300

pure clay clay/long aliphatic chain clay/aliphatic carboxilic acid clay/aliphatic alcohol

200

100

0 0 10 20 30 40

2 theta, degree


GPC-characterization of PE molecular weight polydispersity

Weighted %*10

-1

2,00

Mw/Mn~7 Mw~106

1,00

0,00 4,00 5,00 6,00 7,00

Log Molecular Weight

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X-Ray Patterns of PE / 14% Clay Nanocomposite Treated by the Hot Solvent

3000

I, ar. un.

2000

1000

0

0

10

20

30

2 , degree

solvent part
2500 2000 1500 1000 500 0

I, ar. un.

0

10

20

30

2 , degree

intermediate part
1000 750

I, ar. un.

500 250 0

0

10

20

30

2 , degree

unsolved part


X-ray Pattern of PE/14% clay Nanocomposite at 20 C
I, ar.un. 2110 = 21,40 ; L110= 20 nm c ~ 70%
PE

0

0

I, ar.un.

I, ar.un.

(110) clay

(020) (210) (120)

5

10

clay

(200)

30

35

40

10

20

2, degree

30


Mechanical Properties of Neat PE and PE-clay Nanocomposites
COMPOSITION,wt% Clay Silicagel STRESS, MPa 20oC 28.3 2.3 6.9 9.8 13.0 14.0 3.4 21.3 21.8 30.4 22.2 20.3 19.7 16.6 18.9 70oC STRAIN, % 20oC 624 274 261 285 224 259 268 469 483 70oC MODULUS, MPa 20oC 396 333 422 369 447 505 487 156 170 70oC

SAMPLE TIPS 172 TIPS 015 TIPS 013 TIPS 019 TIPS 016 TIPS 009 TIPS 010

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X-Ray Patterns of PE / 14% Clay Nanocomposite under Elastic Loading

direct position

side position


X-Ray Patterns of PE / 14% Clay Nanocomposite Drawn at 20 oC up to Break

"a" ­ point

"b" ­ point

"c" ­ point, direct position

"c" - point, side position


X-Ray Patterns of PE / 14% Clay Nanocomposite Uniaxially Drawn at 70 oC up to 500 %

direct position

side position


DSC-data for Polybutene-1/Clay Nanocomposite

Heat Flow

2 heating

nd

endo

1 heating

st

0

50

100

150

T, C

0


X-ray Pattern for Polybutene-1/Clay Nanocomposite
I, ar.un.
5

10

15

20

2, degree

I, ar.un.

25

30

35

2, degree
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40


DSC-data. Drawn PE/PP films,

(isometric conditions) 10°C/min
146°C 156°C 163°C 168°C 1st heating 2nd heating

126°C

exoendo

0

| 50

| 10 0

| 150

T,°C

147°C 165°C 154°C 169°C

1 heating

st

127°C

2nd heating | 50 | 10 0 | 150

0

T,°C TIPS


Temperature evolution of the equatorial diffraction pattern of the main reflections for the composition II deformed to 2500%

Temperature evolution of WAXS and SAXS patterns of the oriented composition III

1400C

1500C

1600C

Temperature evolution of meridional X-ray diffractograms of the composition II deformed to 1050%

I

11 2 o C 136 o C 144 o C

13 6 o C

25 o C
71 72 73 74 75 76

2,
77

o

Heating

Cooling

25 o C


Temperaature volution n of thie tensityity per ture e evolutio of the nintens of the main rreflections forhte e the main eflections for t h Composiion II defairmed 30% of PE composit tion cont o ning to 2500% deformed to 2500%

Temperature evolution of the angular position of the main reflections for the composition containing 30% of PE deformed to 2500%

2
Orthorhombic Orthorhombic

Hexagonal
100

Hexagonal

T, C

0

T, C

0


X-Ray Patterns for 1,4-trans-Polybutadiene / Clay Nanocomposite

1,4-trans-Polybutadiene
1200

I, ar. un.

800

Clay
400

0

0

5

10

15

20

25

30

35

2, degree


The Schematic Presentation of Possible Phase Transition in Mesophase Flexible-Chains Polymers
Melt

Crystallization

Short-range order
heating cooling High-temperature form of mesophase

2D-long-range order
Glass transition of mesophase

3D-long-range order
Crystallites and their boundaries Low-temperature form of mesophase


" ­ "

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:
I. ­ : ( ) ; ­ , ..; ; , , in situ ; ( ) . II. «» ­ in situ : () ; «» ; ( ) 1D- 2D-.

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