Sage Journals: Discover world-class research

Abstract

The behaviour of a family of polymers containing equimolar amounts of hydroquinone and isophthalic acid residues, together with changing proportions of hydroxybenzoic acid moieties has been studied. The response of the polymers to an external shear field has been monitored using a polarizing microscope. The conditions which lead to the formation of the banded texture for each of the polymers has been determined. It is found that compositions which are isotropic at rest can form the banded texture following shear at sufficiently high rates. However, the bands so formed are not stable upon annealing. The optical features of the banded texture, its period and underlying trajectory, are determined both by the polymer composition and the conditions of shear.

Get full access to this article

View all access options for this article.

References

[1] Toth W J and Tobolsky A V 1970 Polymer Lett 8 53-53

[2] Horo H , Ishikawa S and Oda K 1985 Appl. Polym. Symp. 41 269-269

[3] Navard P 1986 J. Polym. Sci. (Polym. Phys. Edn.) 24 435-435

[4] Marrucci G , Grizzuti N and Buonaurio A 1987 Mol. Cryst. Liq. Cryst 153 262-262

[5] Marsano E , Carpaneto L and Ciferri A 1988 Mol. Cryst. Liq. Cryst. 158B 267-267

[6] Donald A M , Viney C and Windle A H 1983 Polymer 24 155-155

[7] Liu X, Shen D. Shi L. Xu M, Zhou Q and Duan X 1992 Preprint

[8] Donald A M and Windle A H 1983 Colt. Polym. Sci. 261 793-793

[9] Donald A M and Windle A H 1983 J. Mater. Sci. 18 1143-1143

10.

[10] Viney C , Donald A M and Windle A H 1985 Polymer 26 870-870

11.

[11] Viney C , Donald A M and Windle A H 1983 J. Mater. Sci. 18 1136-1136

12.

[12] Enrst B and Navard P 1989 Macromolecules 22 1419-1419

13.

[13] Maffettone P L , Grizzuti N and Marrucci G 1985 Liq. Cryst. 4 385-385

14.

[14] Ray A D and Dean M M 1989 Liq. Cryst. 4 409-409

15.

[15] Marrucci G 1985 Pure Appl. Chem. 57 1545-1545

16.

[16] Marrucci G and Maffettone P L 1989 Macromolecules 22 4076-4076

17.

[17] Larson R G 1990 Macromolecules 23 3983-3983

18.

[18] Erdemir A B , Joynson D J and Tomka J G 1986 Polymer 27 441-441

19.

[19] Blundell D J , MacDonald W A and Chivers R A 1989 High Perform. Polym. 1 97-97

20.

[20] Kiss G 1986 J. Rheol. 30 585-585

21.

[21] Griffin B P and Cox M K 1980 Br. Polym. J. 12 147-147

22.

[22] MacDonald W A , MacLenaghan A D W , McLean G , Richards R W and King S M 1991 Macromolecules 24 6164-6164

23.

[23] Flory P J 1978 Macromolecules 11 1138-1138

24.

[24] Lipatov Y S , Tsukruk V V and Shilov V V 1983 Polymer Commun. 24 75-75

25.

[25] Flory P J 1956 Proc. R. Soc. A 234 73-73

26.

[26] Martin P F and Stupp S 1988 Macromolecules 18 2459-2459

27.

[27] BIundell D J , Chivers R A , Curson A D , Love J C and MacDonald W A 1988 Polymer 29 1459-1459

28.

[28] Viney C and Windle A H 1982 J. Mater. Sci. 17 2661-2661

29.

[29] Nicholson T M 1988 PhD Thesis University of Cambridge

30.

[30] Matheson R R 1980 Macromolecules 13 643-643

31.

[31] Aharoni S M 1980 Polymer 21 1413-1413

32.

[32] Aharoni S M and Walsh E K 1979 Macromolecules 12 271-271

33.

[33] Iizuka E 1974 Mol. Cryst. Liq. Cryst. 25 287-287

34.

[34] Balbi C , Bianchi E , Ciferri A , Tealdi A and Krigbaum W R 1980 J. Polym. Sci. (Polym. Phys. Edn.) 18 2037-2037

35.

[35] Stell D T 1992 PhD Thesis University of Cambridge

36.

[36] Flory PJ 1956 Proc. R. Soc. A 234 60-60

37.

[37] Cifem A and Marrucci G 1977 Polym. Lett. 15 643-643

38.

[38] Marrucci G and Sarti G C 1979 Ultrahigh Modulus Polymers ed A Ciferri and I M Ward (London: Applied Science)

The Effect of Changing Chain Stiffness on Morphology in a Family of Thermotropic Copolyesters

Abstract

Get full access to this article

References