Ring-opening metathesis polymerization of cyclopropene derivatives towards polyolefin elastomer analogues

Bai, Junhong; Wang, Yu; You, Wei

doi:10.1007/s11426-022-1395-0

Cited by 4 publications

(3 citation statements)

References 38 publications

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“…Overall, the obtained OBC-g-MA elastomers exhibit SR values larger than 55%, which are comparable with other previously reported polyolefin elastomers. 47,48 Hence, effective grafting of polar monomer onto polyolefin elastomers can be feasible for retaining and even enhancing elastic performance.…”

Section: Mechanical Properties Of Obc-g-ma Elastomersmentioning

confidence: 99%

Reactive melt‐grafting of maleic anhydride onto olefin block copolymer toward high‐performance polar polyolefin thermoplastic elastomer

Kou,

Ma,

et al. 2024

Polymer International

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The block structure of Olefin Block Copolymer (OBC) elastomer gives it good elasticity and heat‐resistance in relative to other polyolefin elastomers. However, the non‐polar nature of OBC chains limits its comprehensive properties like dyeing and toughening for polar engineering plastics. In this work, Maleic Anhydride (MA) and Dicumyl Peroxide (DCP) were selected as a typical polar monomer and a radical initiator to modify the polarity of OBC elastomer. During the melt‐grafting process, DCP content was tuned to optimize the grafting efficiency while the MA‐to‐OBC ratio was fixed as 5 wt%. It was found that all the melt‐grafting reactions show high‐efficiency and can be finished in 3 min at 170 °C. With the increase of DCP content, the estimated grafting degree of OBC‐g‐MA elastomer increases from 0.40% to 1.16% along with increased gel content from 4.27% to 22.44%. A suitable grafting process was obtained with DCP content of 3.0 wt% by balancing grafting efficiency and final mechanical properties. The optimized OBC‐g‐MA elastomer with grafting degree of 0.92% has a mechanical strength of 17.15 MPa, Young's modulus of 26.35 MPa, elongation of 1564%, and strain recovery of 59.73%. Additionally, contact angle test shows that polar grafting can increase surface hydrophilicity while excessive crosslinking promotes hydrophobicity. Therefore, our work has demonstrated the feasibility of reactive melt‐grafting method to prepare OBC‐g‐MA elastomer and can also provide processing reference for other chemical functionalization of polyolefin thermoplastic elastomers.This article is protected by copyright. All rights reserved.

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Section: Mechanical Properties Of Obc-g-ma Elastomersmentioning

confidence: 99%

Reactive melt‐grafting of maleic anhydride onto olefin block copolymer toward high‐performance polar polyolefin thermoplastic elastomer

Kou,

Ma,

et al. 2024

Polymer International

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“…The key to producing unique and excellent POE materials lies in the design and synthesis of catalysts [4] , making the development of new POE catalysts particularly crucial. This review introduces commonly used POE catalytic systems by foreign companies and their catalytic performance, while also providing a prospect for future development of China's POE catalytic system [5] .…”

Section: The Structure Of Polyolefin Elastomermentioning

confidence: 99%

Advances in catalytic systems and application status of polyolefin elastomer

Liu,

Yang,

Chen

et al. 2023

Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023)

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Polyolefin elastomer (POE) is a type of thermoplastic elastomer made by copolymerizing ethylene and α-olefin. It is highly processable like other thermoplastics, but also has rubber-like elasticity, making it an ideal material for future societal demands. This review highlights recent advances in catalytic systems used for producing POE, including evaluations of both domestic and foreign catalysts and their performance. Additionally, the review highlights the key advantages and applications of POE. Future research should focus on the synthesis of new POE catalysts to further enhance this material.

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“…[8][9][10][11] The ROMP reactions that feature living polymerization characteristics enable the precise control of polymer architectures, such as linear, block, bottlebrush, and star shapes, with high structural accuracy. [12][13][14] Recent research efforts have focused on developing ROMP polymers with backbone-degradability, a property lacking in conventional ROMP products. [15][16] Although significant progress has been made in developing diverse cleavable linkages in degradable-ROMP polymers, achieving accurate distribution control of the degradable functional groups remains a significant challenge, likely due to the moderate to low ring-strain exhibited in most of the degradable ROMP monomers (Figure 1a).…”

Section: ■ Introductionmentioning

confidence: 99%

Facile Access to Well-Controlled Backbone-Degradable Multiblock and Statistical Copolymers from Living ROMP

Wang

Wen

et al. 2023

Preprint

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Traditional ring-opening metathesis polymerization (ROMP) reactions exhibit wide functional group compatibility and precise con-trol over polymer architectures, albeit with nondegradable backbones. Recent progress has resulted in a series of degradable ROMP products with diverse cleavable functional groups that are derived from the corresponding monomers. However, the major-ity of the monomers display moderate to low ring strain, which restricts their living polymerization reactivity. In this study, a novel category of readily available 7-oxa-2,3-diazanorbornenes (ODAN) is presented, which exhibits the highest ring-strain (22.8 kcal/mol) compared to existing degradable ROMP monomers. This trait endows ODAN with the ability to perform living polymer-ization reactions, generating narrowly dispersed homopolymers, block copolymers, and statistical copolymers with various cyclic olefin comonomers, thereby enabling precise control over the distribution of degradable functional groups. Additionally, the re-sultant polymers comprise directly connected allyl hemiaminal ether and urethane units, which are hydrolyzed at controllable rates. Thus, these well-defined, structure-tunable, and backbone-degradable ROMP polymers are successfully applied as nano-etching materials and biodegradable drug delivery vehicles.

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Ring-opening metathesis polymerization of cyclopropene derivatives towards polyolefin elastomer analogues

Cited by 4 publications

References 38 publications

Reactive melt‐grafting of maleic anhydride onto olefin block copolymer toward high‐performance polar polyolefin thermoplastic elastomer

Reactive melt‐grafting of maleic anhydride onto olefin block copolymer toward high‐performance polar polyolefin thermoplastic elastomer

Advances in catalytic systems and application status of polyolefin elastomer

Facile Access to Well-Controlled Backbone-Degradable Multiblock and Statistical Copolymers from Living ROMP

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