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Abstract
A short survey is given of the correlation between mechanical properties and molecular model of homopolymer solids in rubbery, glassy and crystalline state. Particular emphasis is given to the plastic deformation of crystalline solids and the mechanical properties of the fibrous structure obtained by such deformation. The main difference between the spherulitic and the fibrous morphology, which explains the enormous difference in elastic modulus and strength, is not the crystallinity, crystal structure and orientation, but the fact that the basic element of the former structure is the extremely thin and easily deformable crystal lamella and, in the latter case, the very long and strong microfibril. The deformation of the fibrous structure is only possible by the sliding motion of microfibrils which is opposed by the autoadhesion forces between adjacent microfibrils over their full length or by fracture of microfibrils; which demands the rupture of the intrafibrillar tie molecules constituting a much larger fraction of the total number of chains of the crystal lattice than in the case of spherulitic morphology.
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Affiliation(s)
- A. Peterlin
- Camille Dreyfus Laboratory Research Triangle Institute Post Office Box 12194 Research Triangle Park, North Carolina 27709
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Affiliation(s)
- A. Peterlin
- a Camille Dreyfus Laboratory Research Triangle Institute , Research Triangle Park, North Carolina
- b Polymer Division , National Bureau of Standards , Washington D.C
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DeVries KL, Williams ML. Micromechanics of fracture initiation in highly oriented polymers. J MACROMOL SCI B 2006. [DOI: 10.1080/00222347308201643] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- K. L. DeVries
- a Department of Mechanical Engineering , University of Utah , Salt Lake City , Utah
| | - M. L. Williams
- b College of Engineering, University of Utah , Salt Lake City , Utah
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Affiliation(s)
- A. Peterlin
- a Polymer Science and Standards Division , National Bureau of Standards , Washington, D.C., 20234
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Affiliation(s)
- A. Peterlin
- a Camille Dreyfus Laboratory Research Triangle Institute Research , Triangle Park, North Carolina, 27709
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Betteridge D, Cridland J, Lilley T, Shoko N, Cudby M, Wood D. Acoustic emission and e.s.r. studies of polymers under stress. POLYMER 1982. [DOI: 10.1016/0032-3861(82)90297-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Nagamura T, Devries KL. Radical formation and deformation in poly-p-(2-hydroxyethoxy) benzoic acid fibers. POLYM ENG SCI 1979. [DOI: 10.1002/pen.760190206] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Elektronenspinresonanz, eine molekulare Sonde bei der mechanischen Beanspruchung von Thermoplasten. ACTA ACUST UNITED AC 1972. [DOI: 10.1007/bf01498887] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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