Synthesis of Diblock and Triblock Polymers from Cyclooctadiene and Norbornene Via ROMP in Miniemulsion
Synthesis of Diblock and Triblock Polymers from Cyclooctadiene and Norbornene Via ROMP in Miniemulsion
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环辛二烯和降冰片烯在细乳液中通过 ROMP 合成二嵌段和三嵌段聚合物
DOI：
10.1002/marc.201900087
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发表时间：
2019
影响因子：
4.6
通讯作者：
Cunningham Michael F.
中科院分区：
文献类型：
--
作者：
Torres‐Rocha Olga Lidia;Wu Xiaowei;Zhu Chunyang;Crudden Cathleen M.;Cunningham Michael F.
研究了纳米粒子分散体系中开环歧化聚合(ROMP)合成二嵌段和三嵌段线型聚烯烃的方法。以1，5-环辛二烯和降冰片烯(NB)为原料，在亲水催化作用下合成了不同嵌段聚烯烃，得到了PCOD-b-PNB、PNB-b-PCOD和PCOD-b-PNB-b-PCOD结构。通过核磁共振监测，每个嵌段的聚合在相对较短的时间(≈1小时)内实现了高单体转化率(>；90%)。凝胶渗透色谱证实了该体系的活性，这是获得嵌段共聚物所必需的。多步过程中胶乳粒子的大小在90~150 nm之间。结果表明，从具有嵌段共聚结构的ROMP基单体中获得纳米胶乳是可能的，这为共聚含有不同官能团的烯烃合成新材料创造了机会。
The synthesis of diblock and triblock linear polyolefins via ring opening metathesis polymerization (ROMP) in an aqueous nanoparticle dispersion is presented. The different block polyolefins are synthesized from the cyclic olefins 1,5‐cyclooctadiene and norbornene (NB), using a water‐soluble TEGylated ruthenium alkylidene catalyst, yielding the structures PCOD‐b‐PNB, PNB‐b‐PCOD, and PCOD‐b‐PNB‐b‐PCOD. High monomer conversion (>90%), monitored by NMR, is achieved in relatively short times (≈1 h) for the polymerization of each block. The livingness of the system, essential to obtain block copolymers, is confirmed by gel permeation chromatography. Latex particles' size during the multiple steps range between 90 and 150 nm. The results demonstrate that it is possible to obtain nanoparticle latexes from ROMP‐based monomers with block copolymer architectures, creating the opportunity to copolymerize olefins bearing different functional groups for the synthesis of new materials.