Effective incorporation of divinylbenzene in the isospecific styrene polymerization catalyzed by an aryl-substituted [OSSO]-type zirconium(IV) complex
Effective incorporation of divinylbenzene in the isospecific styrene polymerization catalyzed by an aryl-substituted [OSSO]-type zirconium(IV) complex
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DOI：
10.1038/s41428-022-00660-w
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发表时间：
2022-06
期刊：
影响因子：
2.8
通讯作者：
Kazuaki Nakamura;Takuya Kishi;A. Ishii;N. Nakata
中科院分区：
文献类型：
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作者：
Kazuaki Nakamura;Takuya Kishi;A. Ishii;N. Nakata
采用芳基取代的[OSSO]型锆（IV）预催化剂2，在干燥改性甲基铝氧烷（dMMAO）作为活化剂的情况下，通过立体定向共聚实现了对二乙烯苯（DVB）在等规聚苯乙烯单元中的大量结合。所得聚（iso苯乙烯- co - DVB）s具有很高的分子量（Mw= 93,000 ~ 131,000 g mol - 1）和单峰多分散性指数（PDI = 1.8 ~ 2.5）。相应的活性可达738 g mmol(2b) -1h-1。共聚物中DVB的含量（7 ~ 20 mol %）随进料浓度的变化而变化。这些共聚物表现出非晶相结构，玻璃化转变温度（Tgvalues）为84.8 ~ 110.9℃。
The abundant incorporation ofp-divinylbenzene (DVB) in isotactic poly(styrene) units has been achieved by the stereospecific copolymerization employing an aryl-substituted [OSSO]-type zirconium(IV) precatalyst2bin the presence of dried modified-methylaluminoxane (dMMAO) as an activator. The resulting poly(iso-styrene‐co‐DVB)s possessed very high molecular weights (Mw= 93,000−131,000 g mol−1) and unimodal polydispersity indices (PDI = 1.8−2.5). The corresponding activities were recorded to reach up to 738 g mmol(2b)–1h–1. The DVB contents (7–20 mol %) in the copolymer could be varied depending upon the feed concentration. These copolymers exhibited an amorphous phase structure with glass transition temperatures (Tgvalues) of 84.8–110.9 °C.