Zeon Corporation

Yuki Nakama

Shigetaka Hayano

Taichi Sawaguchi

Hideyuki Kanda

Provided is a hydrogenated ring-opened polymer having excellent ductility. The hydrogenated ring-opened polymer includes 90 mass % or more of norbornene-derived structural units. The proportion of meso diads of cis-structural units (I) of formula (I), shown below, included among the norbornene-derived structural units is not less than 0% and not more than 30% or is not less than 70% and not more than 100%. Trans-structural units (II) of formula (II), shown below, constitute a proportion of not less than 0.5% and not more than 20% among the total of the cis-structural units (I) of formula (I) and the trans-structural units (II) of formula (II).

Hydrogenated ring-opened polymer, resin composition, and shaped product

Disclosed is a hydrogenated norbornene ring-opened polymer, wherein a proportion of a norbornene-derived repeating unit is 90% by mass or more, a meso diad fraction of the norbornene-derived repeating unit is 80% or more, and in an X-ray diffraction pattern measured at 25&#xb0; C. using a CuK&#x3b1; radiation source, an X-ray diffraction peak is observed which has a peak top positioned in a diffraction angle (2&#x3b8;) range of 17&#xb0; or more and 18&#xb0; or less.

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Tokyo, Japan

Yuki Nakama