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Updated: Jun 29, 2025

Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application
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开发基于子油的高性能刚性聚氨-尿素泡:一种新的序列化和预聚合工艺

Louell Nikki A Hipulan1,2,3, Roger G Dingcong1, Dave Joseph E Estrada1

  • 1Center for Sustainable Polymers, Mindanao State University - Iligan Institute of Technology, A. Bonifacio Avenue, Iligan9200, Philippines.

ACS omega
|March 25, 2024
PubMed
概括

一种新的子油基聚合物 (COPUAP) 改进了完全基于生物的刚性聚氨尿素泡 (RPUAF). 与以前的生物基泡相比,这种增强泡具有更高的强度,绝缘性和防水性.

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Step-growth or condensation polymerization is a stepwise reaction of bi or multifunctional monomers to form long-chain polymers. As all the monomers are reactive, most of the monomers are consumed at the early stages of the reaction to form small chains of reactive oligomers, which then combine to form long polymer chains in the late stages. Hence, the reaction has to proceed for a long time to achieve high molecular weight polymers.
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Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
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The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
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