Biaxial Orientation Mechanism of Drawn Natural Rubber. III. Determination of the Orientation Function from Wide‐Angle X‐Ray Diffraction Pattern

Alam, Mohammad Mahay; Osaka, Hidemitsu; Asano, Tsutomu

doi:10.1080/00222340701849202

Cited by 4 publications

(2 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In our recent paper [9] we calculated a theoretical relation between the intensity ratio of 120 and 200 reflections R th , and F 200 using the Gaussian and Lorentzian distribution functions. The result of the relation R th versus F 200 is indicated in Fig.…”

Section: Quantitative Evaluation Of Bo By the Orientation Functionmentioning

confidence: 99%

“…In the previous paper we measured F 200 from the intensity ratio (R exp ) of the 200 and 120 reflections. [9] The values of F 200 were simply evaluated from the WAXD through pattern, where the X-ray beam was kept perpendicular to the film surface without rotation. Using the Gaussian-and/or Lorentzian-distribution functions, a theoretical pattern of R th vs F 200 was calculated.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Biaxial Orientation Mechanism of Drawn Natural Rubber. IV. The Effect of Aspect Ratio

Alam

Asano

2008

Journal of Macromolecular Science, Part B

Self Cite

View full text Add to dashboard Cite

Biaxial orientation (BO) of crystallites was observed for uniaxially elongated natural rubber (NR) films as a function of an aspect ratio (AR ¼ width/length of the original sample). The wide angle X-ray diffraction results were analyzed, showing that the crystalline c-axis was parallel to the draw-direction, while the a-axis became parallel to the film surface. The degree of BO was quantitatively evaluated by an orientation function of the (200) plane, F 200 . The value of F 200 increased with increasing AR, showing that the mechanism of microscopic crystallization is controlled by the macroscopic AR. The observed BO is consistently explained by the shish kabab-like secondary crystallization in the ellipsoidal free space surrounding the primary fibril. The shape of free space becomes highly ellipsoidal in the film having high AR.

show abstract

Section: Quantitative Evaluation Of Bo By the Orientation Functionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%