The present invention provides hydrogenated β-pinene-based polymers with excellent heat resistance and light resistance, low absorptivity and high transparency, as well as molded articles thereof. The polymers of the present invention contain 50% by mass or more of β-pinene units and are hydrogenated β-pinene-based polymers where the ratio of the proton integral value at 6 to 8 ppm to the total proton integral value in a
1
H-NMR spectrum is 2.3×10
−5
or less or the p-phenylene group content is 0.0055% by mass or less, and the ratio of the proton integral value at 4.5 to 6 ppm to the total proton integral value is 2.8×10
−4
or less or the cyclohexene-1,4-diyl group content is 0.29% by mass or less. The molded articles of the present invention contain the above hydrogenated β-pinene-based polymers.
本发明提供了具有优异耐热性和耐光性、低吸收性和高透明度的氢化
β-蒎烯基聚合物及其成型物。本发明的聚合物含有50%或更多的
β-蒎烯单元,是氢化
β-蒎烯基聚合物,其中在1H-NMR光谱中6至8 ppm的质子积分值与总质子积分值的比值为2.3×10−5或更低,或p-苯撑基含量为0.0055%或更低,且在4.5至6 ppm的质子积分值与总质子积分值的比值为2.8×10−4或更低,或
环己烯-1,4-二基基团含量为0.29%或更低。本发明的成型物包含上述氢化
β-蒎烯基聚合物。