Download An Introduction to Polymer Colloids by Mohamed S. El-Aasser (auth.), Françoise Candau, Ronald H. PDF

By Mohamed S. El-Aasser (auth.), Françoise Candau, Ronald H. Ottewill (eds.)

The progress of curiosity within the topic of Polymer Colloids over the past twenty 5 years or so has been very huge ensuing now in significant overseas meetings on an annual foundation and lots of nationwide ones in addition. The curiosity stems not just from the big variety of functions of those fabrics but additionally from a interest as to the mechanism of formation and their growing to be use as version debris to enquire basic features of physics and chemistry. In July 1988 a NATO complex examine Institute was once held in Strasbourg, France, on the Centre St. Thomas. As an academic creation to this I nstitute a chain of 8 lectures used to be given to hide the basic facets of the topic. those 8 lectures have now been compiled into an Introductory textual content masking, emulsion poly­ merization, dispersion polymerization, inverse emulsion polymerization, the morphology of copolymer latices, the colloidal homes of latices, characterization equipment and rheology. it's was hoping that those will serve a large viewers, undergraduates, graduate-students and learn staff, either in and academe. The chapters all comprise evaluate fabric brand new on the time of e-book. fhe 1988 NATO complicated research I nstitute was once made attainable by way of a provide from the NATO-AS I programme and the subsequent businesses: BASF, Ludwigshafen, West Germany The Dow Chemical corporation, Michigan, united states Dow Chemical Rheinwerk GmbH, Rheinmunster, West Germany ICI PLC, Runcorn, England S. C. Johnson and Son Inc., Racine, united states NORSOLOR, Verneuil en Halatte, France Rhone Poulenc, Aubervilliers, France.

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54. 55. 56. 57. 58. 59. 60. 61. 62. 63. 64. 65. 66. 67. 68. 69. 70. 71. 72. 73. 74. 75. , EI-Aasser, M. , Silebi, C. A. and Vanderhoff, J. W. , 1989, accepted for publication. W. , 1988,26, 1495. S. , 1989, 691. Johnson, P. L. , 1984, 22, 3967. A. and Martin, C. , 1986, 7, 245. S. , 1981, 103, 4279. Jayakrishnan, A. , 1984, 22, 31. S. , Macromolecules, 1987, 20, 1216. McCutchen's Detergent and Emulsifiers, NOrth American Edition, MC Publishing, Glen Rock, New Jersey, 1988. , 1949, 1(5), 311. Clubs, 28, June 1956.

2 Amphipathic Steric Stabilizer In order for the newly formed nuclei to grow as discrete entities into polymer particles, it is necessary for them to be well stabilized. Three types of polymers have been successfully used as steric stabilizers, namely, block and graft copolymers, homopolymers and macromonomers. 1 Amphipathic block and graft copolymers. It has been found that preformed block and graft copolymers are very effective as steric stabilizers. In these tailored polymers one portion of the copolymer is nominally insoluble in the dispersion medium such that it will form the 39 anchor for the stabilizer to the growing polymer particle.

The initiator concentration and the temperature. It has been found that these variables can have a significant effect on the particle size. the molecular weight of the final polymer particles and the kinetics of the particle polymerization process. The interrelationships between these variables appear to be quite complex. We have therefore chosen to discuss these variables individually in order to delineate their effect on the properties of the particles that are formed. 41 3. 16) that the greater the concentration of stabilizer used during the reaction then the smaller are the particles that are produced.

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