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Capability of PN3-type Cobalt Complexes toward Selective (Co-)Polymerization of Myrcene, Butadiene, and Isoprene: Access to Biosourced Polymers
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-02-15 , DOI: 10.1021/acs.iecr.8b05866 Wenxin Li 1 , Junyi Zhao 1 , Xuequan Zhang 2 , Dirong Gong 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-02-15 , DOI: 10.1021/acs.iecr.8b05866 Wenxin Li 1 , Junyi Zhao 1 , Xuequan Zhang 2 , Dirong Gong 1
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In this manuscript, cobalt complexes Co1, Co2, and Co3 supported by PN3-type of ligand have been prepared, characterized, and applied in polymerization of myrcene (My), butadiene (Bd), and isoprene (Ip). The type of catalyst, cocatalyst, and temperature variation have little influence on polymer microstructure. We also have reported the preparation of novel isoprene–myrcene copolymers in the presence of complex Co1. Isoprene and myrcene are found to be randomly copolymerized at various monomer feeding, with typical myrcene incorporation of 7.6–57.6%. The copolymer has cis-1,4 microstructure of 69.4–73.4% and 79.4–83.4% for polyisoprene and polymyrcene segments, respectively, and Tg = ca. −41.7 to 51.1 °C. The reactivity ratios obtained from the Fineman–Ross plot of r1 = 0.74 and r2 = 1.67 (r1 = kmymy/kmyip and r2 = kipip/kipmy) indicate that isoprene has the privilege of getting into the macromolecules during the polymerization by this catalyst system.
中文翻译：
PN 3型钴配合物对月桂烯，丁二烯和异戊二烯的选择性（Co-）聚合的能力：获得生物来源的聚合物
在该手稿中，已经制备，表征了由PN 3型配体支撑的钴配合物Co1，Co2和Co3，并将其应用于月桂烯（My），丁二烯（Bd）和异戊二烯（Ip）的聚合中。催化剂的类型，助催化剂和温度变化对聚合物的微观结构影响很小。我们还报道了在复合Co1存在下制备新型异戊二烯-月桂烯共聚物的方法。发现异戊二烯和月桂烯在各种单体进料中是无规共聚的，典型的月桂烯掺入量为7.6–57.6％。对于聚异戊二烯和聚月桂烯链段，该共聚物的顺式-1,4微观结构分别为69.4–73.4％和79.4–83.4％，并且T g =约。−41.7至51.1°C。从r 1 = 0.74和r 2 = 1.67的Fineman-Ross图获得的反应率（r 1 = k mymy / k myip和r 2 = k ipip / k ipmy）表明异戊二烯具有进入大分子的特权。在该催化剂体系的聚合过程中。
更新日期：2019-02-15
中文翻译：
PN 3型钴配合物对月桂烯，丁二烯和异戊二烯的选择性（Co-）聚合的能力：获得生物来源的聚合物
在该手稿中，已经制备，表征了由PN 3型配体支撑的钴配合物Co1，Co2和Co3，并将其应用于月桂烯（My），丁二烯（Bd）和异戊二烯（Ip）的聚合中。催化剂的类型，助催化剂和温度变化对聚合物的微观结构影响很小。我们还报道了在复合Co1存在下制备新型异戊二烯-月桂烯共聚物的方法。发现异戊二烯和月桂烯在各种单体进料中是无规共聚的，典型的月桂烯掺入量为7.6–57.6％。对于聚异戊二烯和聚月桂烯链段，该共聚物的顺式-1,4微观结构分别为69.4–73.4％和79.4–83.4％，并且T g =约。−41.7至51.1°C。从r 1 = 0.74和r 2 = 1.67的Fineman-Ross图获得的反应率（r 1 = k mymy / k myip和r 2 = k ipip / k ipmy）表明异戊二烯具有进入大分子的特权。在该催化剂体系的聚合过程中。
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