Zum Deformationsmechanismus der Faserstoffe VI

Kratky, O.; Platzek, P.

doi:10.1007/bf01518687

Cited by 18 publications

(3 citation statements)

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“…In the unstretched state rubber shows an amorphous diagram (44, 69) but crystallizes if stretched beyond 200 per cent (1,10,11,19,37). Its crystal structure has been repeatedly investigated (44, 60, 68), most recently by Morss (46) and Bunn (6).…”

Section: Forces Betweenmentioning

confidence: 99%

Intermolecular Forces and Mechanical Behavior of High Polymers

Mark¹

1942

Ind. Eng. Chem.

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Section: Forces Betweenmentioning

confidence: 99%

Intermolecular Forces and Mechanical Behavior of High Polymers

Mark¹

1942

Ind. Eng. Chem.

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“…The method used for this purpose was x-ray analysis, which has already given much valuable information about the crystallized portion of cellulosic samples. It may be justifiable to regard the study of this crystallized portion as more or less completed, and a recent very careful investigation by S. T. Gross and G. L. Clark (29) seems to have settled the last doubtful questions in this field. As a result of a long series of scientific work started in 1918 (1,3,10,29,39,40,42,46,62,76,77,81,83,84,85,89,93,94,100) we can put forward certain lattices for the micellae of the native and mercerized cellulose which imply definite coordinates for all atoms in the elementary cell and describe the relative positions of the glucose residues and the main-valence chains in a more or less quantitative manner. But this picture excludes entirely the non-cry stallized portion of the samples, and another series of publications has pointed out with increasing emphasis that this part which has escaped to date the direct attack of the x-ray method may also be of considerable interest, especially for the technical properties of the fibers (2,8,11,15,21,28,32,36,37,38,43,51,53,54,55,60,62,66,…”

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confidence: 99%

Intermicellar Hole and Tube System in Fiber Structure.

Mark¹

1940

J. Phys. Chem.

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Combined chemical and physical investigations of various high-polymeric substances have led to the conviction that they are built up of very long chain-like molecules (3,14,27,48,68,98,100,101). All kinds of information could be obtained regarding the average length of these chains, its distribution over the individual molecules, and its change by different chemical or physical treatment. In connection with these results the question was put forward (36,37,43,50,51,63,65) as to how the mechanical and optical properties of fibers and films consisting of high-molecular substances may be explained by the molecular picture of their fine structure. The first attempts to tackle this problem led to two divergent suggestions, which we can regard as extreme opposing points of view from which we may visualize our problem.One can start with the idea that the crystallized regions which have been found by x-ray analysis,-the so-called micellae,-have the form of longish rod-like crystals with more or less regular surfaces and are arranged in the fibers or films similarly to the bricks in a wall. Figure la explains schematically this conception, which we might call the extreme micellarstructure. It involves a very distinct difference between the space inside the crystal lattice (a, b) and outside of it (c, d); intramolecular and intermolecular 1 Presented at the ninety-seventh meeting of the American Chemical Society, held in Baltimore, Maryland, April, 1939.

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“…(1) The deformation process of the regenerated fiber was also studied by using this phenomenon and it was concluded that the results confirm Kratky's second theory (2) in the early stage of stretching in the case of the freshly prepared and swollen state.…”

Section: Introductionmentioning

confidence: 63%