Abstract
Five amorphous polymers are synthesized from five membered cyclic olefins to examine the strain-induced birefringence and viscoelasticity. The complex Young’s modulus and the complex strain-optical ratio are measured from the rubbery plateau to the glassy zones of viscoelasticity. The stress-optical coefficients in the rubbery plateau zone, CR, of the five polyolefins are all positive and very close to each other. This result means that the value of CR is relatively insensitive to the details of molecular structure for this kind of polyolefins. The stress-optical coefficients in the glassy zone, CG, of the four polyolefins which do not contain benzene rings are all negative and small numbers if compared with those of polymers with the benzene rings.
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Inoue, T., Okamoto, H., Osaki, K. et al. Dynamic Birefringence of Amorphous Polyolefins II. Measurements on Polymers Containing Five-Membered Ring in Main Chain. Polym J 27, 943–950 (1995). https://doi.org/10.1295/polymj.27.943
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DOI: https://doi.org/10.1295/polymj.27.943
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