1 H.H. Kausch, G.H. Michler: The Effect of Time on Crazing and Fracture.- 2 L. Monnerie, F. Laupretre, J.-L. Halary: Investigation of Solid-State Transitions in Linear and Crosslinked Amorphous Polymers.- 3 L. Monnerie, J.-L. Halary, H.H. Kausch: Deformation, Yield and Fracture of Amorphous Polymers: Relation to the Secondary Transitions.-

Pt. A: NMR and other Spectroscopic Methods. Pt. B: Mechanical Methods

1. B. Keszler, J.P. Kennedy, Akron, OH, USA Synthesis of High Molecular Weight Poly (Beta-Pinene) 2. Y. Chujo, T. Saegusa, Kyoto, Japan OrganicPolymer Hybrids with Silica Gel by Means of the Sol-Gel Method 3. A. Halperin, Mainz, FRG, M. Tirrell, T.P. Lodge, Minnea- polis, MN, USA Tethered Chains in Polymer Microstructures 4. T.Q. Nguyen, H.-H. Kausch, Lausanne, CH Mechanochemical Degradation in Transient Elongational Flow 5. P. Corradini, G. Guerra, Naples, Italy Polymorphism in Polymers 6. K.A. Armitstead, G. Goldbeck-Wood, A. Keller, Bristol, UK Review of Polymer Crystallization Theories 7. M. Fischer, Fribourg, CH Properties and Failure of Polymers with Tailored Distances between Crosslinks 8. M. Stamm, Mainz, FRG Polymer Interfaces on a Molecular Scale: Comparison of Techniques and Some Examples

This book on "Polymer Fracture" might as well have been called "Kinetic Theory of Polymer Fracture." The term "kinetic theory," however, needs some de finition or, at least, some explanation. A kinetic theory deals with and particu larly considers the effect of the existence and discrete size, of the motion and of the physical properties of molecules on the macroscopic behavior of an ensemble, gaseous or other. A kinetic theory of strength does have to consider additional aspects such as elastic and anelastic deformations, chemical and physical reactions, and the sequence and distribution of different disintegration steps. In the last fifteen years considerable progress has been made in the latter do mains. The deformation and rupture of molecular chains, crystals, and morphologi cal structures have been intensively investigated. The understanding of the effect of those processes on the strength of polymeric materials has especially been furthered by the development and application of spectroscopical methods (ESR, IR) and of the tools offracture mechanics. It is the aim of this book to relate the conventional and successful statistical, parametrical, and continuum mechanical treatment of fracture phenomena to new results on the behavior of highly stressed molecular chains."

7) Kryszewski, M. and A. Szymanski, Macromol. Rev. 4D, 183 (1970). The density and the energetic situation of local- 8) Bassler, H., Kunststoffe 62, 115 (1972). i; ed levels at the polymer surface and bulk and their 9) Rose, A., Helv. Phys. Acta 29, 199 (1956). occupancy probability of excess electrons or defect- 10) Many, A., Y. Goldstein and N. B. Grover electrons determine the electrostatic charging of Semiconductor Surfaces, 139 (Amsterdam 1971): polymer solids associated with the contact of met- 11) Many, A., N. B. Grover, Y. Goldstein and E. als. Accumulation layers of excesselectrons and de- Harnik, ]. Phys. Chern. Solids 14, ]D 5, 298 (1960). pletion layers of defectelectrons can exist near the 12) Many, A., Y. Goldstein and N. B. Grover polymer surface depending on the electrical potential Semiconductor Surfaces, 185 (Amsterdam 1971): of the contacting metal. These layers are caused by 13) Ryvktn, S. M., Photoelectric Effects in Semi- the difference between the physical states of the poly- conductors, 252 (New York 1964). mer surface and bulk. The energetic situation of the 14) Cholvdry, A. and C. R. Westgate, ]. Phys. D: localized levels is determined by intermolecular inter- Appl. Phys. 7, 713 (1974). actions and therefore it depends on the state of 15) Many, A., Y. Goldstein and N. B. Grover, order of the surface and the bulk. Semiconductor Surfaces, 136 (Amsterdam 1971).