MODIFIED CONJUGATED DIENE POLYMER, MODIFIED CONJUGATED DIENE POLYMER COMPOSITION, TIRE, AND METHOD FOR PRODUCING MODIFIED CONJUGATED DIENE POLYMER
申请人:Japan Elastomer Co., Ltd.
公开号:EP3517552A1
公开(公告)日:2019-07-31
A modified conjugated diene polymer satisfying the following conditions (I) to (IV):
(I) at least two peaks are observed in a molecular weight distribution curve obtained from measurement by gel permeation chromatography (GPC);
(II) when a peak of the highest molecular weight is defined as a peak (B), a peak of the largest peak area except for the peak (B) is defined as a peak (T) in the molecular weight distribution curve, a peak molecular weight of the peak (B) is from 500,000 to 2,500,000 and a peak molecular weight of the peak (T) is from 150,000 to 600, 000;
(III) an area of the peak (T) is from 30% to 80% and a total value of an area of the peak (B) and the area of the peak (T) is 65% or more when the total area of the molecular weight distribution curve is defined as 100%; and
(IV) a proportion of a modified polymer chain(s) in a region ranging from a low-molecular-weight side to a point of 5% cumulative area is from 60% to 99% in the molecular weight distribution curve.
满足以下条件(I)至(IV)的改性共轭二烯聚合物:
(I) 通过凝胶渗透色谱法(GPC)测量得到的分子量分布曲线中至少有两个峰;
(II) 当分子量最高的峰被定义为峰(B)时,分子量分布曲线中除峰(B)外峰面积最大的峰被定义为峰(T),峰(B)的峰分子量为 500,000 至 2,500,000 之间,峰(T)的峰分子量为 150,000 至 600,000 之间;
(III) 当分子量分布曲线的总面积定义为 100%时,峰(T)的面积为 30%至 80%,峰 (B)的面积和峰(T)的面积的总值为 65%或以上;以及
(IV) 在分子量分布曲线中,从低分子量侧到累积面积为 5%的点的区域中,改性聚合物 链的比例为 60%至 99%。