Polymer molecular aspects

Molecular aspects of interdiffusion at a polymer-polymer interface... 

The molecular aspects of. interdiffusion of linear entangled polymers M > Mc cmi fng elcffft g (S pofymer interfaces are summarized in Table 1 [1]. The regJt tion( i qraiq piS 1the interface structure relations in Table 1 hav gbp p... 

Mark,J.E. The Use of Model Polymer Networks to Elucidate Molecular Aspects of Rubberlike Elasticity. Vol. 44, pp. 1 —26. 

Williams, G. Molecular Aspects of Multiple Dielectric Relaxation Processes in Solid Polymers. Vol. 33, pp. 59—92. 

Wilkes, G. L. The Measurement of Molecular Orientation in Polymeric Solids. Vol. 8, pp. 91-136. Williams, G. Molecular Aspects of Multiple Dielectric Relaxation Processes in Solid Polymers. Vol. 33, pp. 59-92. 

Figure 1 Is a flow sheet showing some significant aspects of the Iterative analysis. The first step In the program Is to Input data for about 50 physical, chemical and kinetic properties of the reactants. Each loop of this analysis Is conducted at a specified solution temperature T K. Some of the variables computed In each loop are the monomer conversion, polymer concentration, monomer and polymer volume fractions, effective polymer molecular weight, cumulative number average molecular weight, cumulative weight average molecular weight, solution viscosity, polymerization rate, ratio of polymerization rates between the current and previous steps, the total pressure and the partial pressures of the monomer, the solvent, and the nitrogen.

An interesting aspect here is the length of the crystal - in the direction of the parallel channels - in relation to the polymer length. A polymer molecular mass of 10.000 corresponds with a length of 0.05 pm. So some 20 polymer chains are required for a crystal length of 1 pm. 

J.E. Mark and B. Erman, Molecular aspects of rubber-like elasticity. In R.F.T. Stepto (Ed.), Polymer Networks, Blackie Academic, Chapman Hall, Glasgow, 1998. 

The time-resolved fluorescence spectroscopic approach is very fruitful in elucidating electronic and molecular aspects of laser ablation of fluorescent polymers. While a plasma-like emission and fluorescence behavior of ablated radicals have been reported (21,... 

Peppas, N.A., and Buri, P., Surface, interfacial and molecular aspects of polymer bioadhesion on soft tissue, J. Control. Rel., 2 257-275 (1985). 

We have described some of the general characteristics of polymers, and how they can be grouped according to structure, but we have not addressed any of the more quantitative aspects of polymer structures. For instance, we have stated that a polymer is made up of many monomer (repeat) units, but how many of these repeat units do we typically find in a polymer Do all polymer chains have the same number of repeat units These topics are addressed in this section on polymer molecular weight. Again, the kinetics of polymer formation are not discussed until Chapter 3—we merely assume here that the polymer chains have been formed and that we can count the number of repeat units in each chain. 

Peterlin A (1975) in Ward IM (ed) Molecular aspects of oriented polymers. John WUey, New York, p 36... 

Vaughan AS, Bassett DC (1989) Crystahizahon and morphology. In Allen G, Beving-ton JC (eds) Comprehensive polymer science, vol 1. Pergamon Press, London, chap 12 Peterlin A (1975) Molecular aspects of oriented polymers. In Ward JW (ed) Structure and properties of oriented polymers. Elsevier, London, p 46... 

We have seen that two important lithographic parameters of a resist are sensitivity and contrast. This leads to a consideration of the design features that must be incorporated into the resist in order to optimize these parameters and, in turn, requires a fundamental understanding of the interaction of radiation with matter and how the polymer molecular parameters affect lithographic response. These aspects have been extensively covered in the literature, (5,6) and only the conclusions relating to lithographic performance will be summarized. 

Mark, J. E. The use of model polymer networks to elucidate molecular aspects of rubber-like elasticity, in Adv. Polym. Sci. Berlin, Heidelberg, New York Springer Verlag, Vol. 44, pp. 1-26 (1982)... 

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