Influence of annealing on structure of Nylon 11
Zhang, QZ; Mo, ZS; Liu, SY; Zhang, HF
Source PublicationMACROMOLECULES
AbstractDifferential scanning calorimeter (DSC), wide-angle X-ray diffraction (WAXD), small-angle X-ray scattering (SAXS), and density techniques have been used to investigate the structural parameters of the solid state of Nylon 11 annealed at different temperatures. The equilibrium heat of fusion Delta H-m(0) and equilibrium melting temperature T-m(0) were estimated to be 189.05 J g(-1) and 202.85 degrees C respectively by using the Hoffman-Weeks approach. The degree of crystallinity (W-c,W-x) ranged approximately 24-42% was calculated by WAXD and compared with those by calorimetry (W-c,W-h) and density (W-c,W-d) measurements. The radius of gyration R-g, crystalline thickness L-c, noncrystalline thickness L-a, long period L, semiaxes of the particles (a, b), electron-density difference between the crystalline and noncrystalline regions eta(c) - eta(a), and the invariant Q increased with increasing annealing temperature. The analysis of the SAXS data was based upon the particle characteristic function and the one-dimensional electron-density correlation function. An interphase region existed between the crystalline and noncrystalline region with a clear dimension of about 2 nm for semicrystalline Nylon 11. Instead of the traditional two-phase model, a three-phase model has been proposed to explain these results by means of SAXS.
Indexed BySCI
WOS IDWOS:000088691700039
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Document Type期刊论文
Corresponding AuthorMo, ZS
AffiliationChinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
Recommended Citation
GB/T 7714
Zhang, QZ,Mo, ZS,Liu, SY,et al. Influence of annealing on structure of Nylon 11[J]. MACROMOLECULES,2000,33(16):5999-6005.
APA Zhang, QZ,Mo, ZS,Liu, SY,&Zhang, HF.(2000).Influence of annealing on structure of Nylon 11.MACROMOLECULES,33(16),5999-6005.
MLA Zhang, QZ,et al."Influence of annealing on structure of Nylon 11".MACROMOLECULES 33.16(2000):5999-6005.
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