The structure and thermodynamic properties of atactic and isotactic acrylic and methacrylic polymers containing 16–18 carbon atoms in the n‐aliphatic side chains, and of copolymers of hexadecyl acrylate with isopropyl acrylate were studied by means of x‐ray and differential thermal analysis. The crystallization of branched acrylic and methacrylic polymers and of acrylic copolymers proceeds in the form of a hexagonal crystal, regardless of the configuration of the backbone chain. Methods of ordering branched macromolecules are proposed, and the melting points, heats and entropies of fusion determined. The role of flexibility of the backbone chains in ordering and the crystallization processes was determined. In the case of poly(n‐alkyl acrylates) the backbone chain is involved in the crystalline lattice; this is not the case in methacrylates and copolymers of hexadecyl acrylate with isopropyl acrylate. Some similarity was assumed between the structure of biopolymers and synthetic branched polymers.

A review of various approaches to the problem of the proton spin is presented. Arguments are given in favor of the idea that the answer to the “spin crisis” is to be found in fundamental nonperturbative properties of the QCD vacuum.

The spectrum of q 2q2 , J p = 0 + , 2 + mesons is discussed. We have shown that due to instanton -induced forces the physical states are strong mixtures of the SU f (3) group basis states. The cross-sections for annihilation of the NN system into (q 2q2 )(qq) mesons are obtained. The a 0 (980) meson is considered as q 2q2 meson consisting of 9 f and 36 f plets. The branchings are also predicted for the cross-sections for production of the a 0 (980) and tensor q 2q2 mesons in NN annihilation.

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A comparative study of the structure of uniaxially-oriented bulk samples of linear PE of various molecular weights over a wide range of draw ratios has been carried out by means of small and wide angle X-ray analysis, NMR-spectroscopy and DSC. The structure of oriented high molecular weight PE samples, prepared by drawing single crystal mats to draw ratios up to 200, have also been studied. A large number of unfolded tie-molecules have been found to exist in the trans-conformation in PE amorphous regions. These tie-molecules, which connect the adjacent crystallites along the axis of orientation, and are not large crystals, account for the high mechanical properties of these samples. It has been shown that in the course of the orientation process, chain unfolding in the amorphous regions is accompanied by the formation of continuous linear systems consisting of several coherent crystallites and tie-molecules. These are coherently aligned along the macromolecular axis. molecular weight PE (> lo6) (7,8) and polymer gels (9); 4. Co-extrusion of PE single crystal mats in the bulk polymer shell followed by uniaxial drawing of mats (10) ( A = 250, E = 220 GPa).