Research Progress of Ring-opening Polymerization of ε-caprolactone Initiated by Degradable Biopolymers

Li, Fenghong; Yan, Shi; Li, Pengzhen; Tianci, Jiang

doi:10.2174/1385272824999200709125407

Cited by 3 publications

(2 citation statements)

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“…Organocatalysts, which have been extensively surveyed since the pioneering work of Hedrick and Waymouth over the last two decades, have also been used prominently to proceed the ROP of TMC, and they typically include organic acids (e.g., sulfonic and phosphoric acids and their derivatives) and organic bases (e.g., guanidine, amidine, and carbene) [ 21 , 22 , 23 , 24 , 25 ]. Aiming at how acidity affected catalytic activity, Hedrick and co-workers used molecular modeling to calculate the energy based on the reaction mechanism, and the results showed that catalysis is indeed dependent on both acid strength and the ability of the conjugate base to act as a hydrogen-bond acceptor, suggesting the superiority of bifunctional activation [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

Ring-Opening Polymerization of Trimethylene Carbonate with Phosphazene Organocatalyst

Zhu

2023

Polymers

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Aliphatic polycarbonate (APC) compounds are an important class of biodegradable materials with excellent biocompatibility, good biodegradability, and low toxicity, and the study of these compounds and their modification products aims to obtain biodegradable materials with better performance. In this context, the ring-opening polymerization (ROP) of trimethylene carbonate (TMC) from a low nucleophilic organic superbase of phosphazene (t-BuP4) as a catalyst and benzyl alcohol (BnOH) as an initiator at room temperature was carefully studied to prepare poly(trimethylene carbonate) (PTMC) which is one of the most studied APC. 1H NMR and SEC measurements clearly demonstrate the presence of a benzyloxy group at the α-terminus of the obtained PTMC homopolymers while investigation of the polymerization kinetics confirms the controlled/living nature of t-BuP4-catalyzed ROP of TMC. On the basis of this, the block copolymerization of TMC and δ-valerolactone (VL)/ε-caprolactone (CL) was successfully carried out to give PTMC-b-PCL and PTMC-b-PVL copolymers. Furthermore, PTMC with terminal functionality was also prepared with the organocatalytic ROP of TMC through functional initiators. We believe that the present ROP system is a robust, highly efficient, and practical strategy for producing excellent biocompatible and biodegradable PTMC-based materials.

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Section: Introductionmentioning

confidence: 99%

Ring-Opening Polymerization of Trimethylene Carbonate with Phosphazene Organocatalyst

Zhu

2023

Polymers

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“…In most commercialized PCL synthesis, ring-opening polymerization (ROP) is the preferable route ( Li et al, 2020 ; Rosa et al, 2021 ). This process is a one-step polymerization that can be catalysed by various metal complexes ranging from simple metal halides to complex organometallics ( Kundys et al, 2018 ; De Hoe et al, 2022 ), and can be controlled in terms of the molecular weight (Mwt) and the polydispersity (Ð).…”

Section: Introductionmentioning

confidence: 99%

Ring opening polymerisation of ɛ-caprolactone with novel microwave magnetic heating and cyto-compatible catalyst

Wang

Dundas

et al. 2023

Front. Bioeng. Biotechnol.

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We report on the ring-opening polymerization of ɛ-caprolactone incorporated with a magnetic susceptible catalyst, FeCl3, via the use of microwave magnetic heating (HH) which primarily heats the bulk with a magnetic field (H-field) from an electromagnetic field (EMF). Such a process was compared to more commonly used heating methods, such as conventional heating (CH), i.e., oil bath, and microwave electric heating (EH), which is also referred to as microwave heating that primarily heats the bulk with an electric field (E-field). We identified that the catalyst is susceptible to both the E-field and H-field heating, and promoted the heating of the bulk. Which, we noticed such promotion was a lot more significant in the HH heating experiment. Further investigating the impact of such observed effects in the ROP of ɛ-caprolactone, we found that the HH experiments showed a more significant improvement in both the product Mwt and yield as the input power increased. However, when the catalyst concentration was reduced from 400:1 to 1600:1 (Monomer:Catalyst molar ratio), the observed differentiation in the Mwt and yield between the EH and the HH heating methods diminished, which we hypothesized to be due to the limited species available that were susceptible to microwave magnetic heating. But comparable product results between the HH and EH heating methods suggest that the HH heating method along with a magnetic susceptible catalyst could be an alternative solution to overcome the penetration depth problem associated with the EH heating methods. The cytotoxicity of the produced polymer was investigated to identify its potential application as biomaterials.

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Study on Mechanical Properties of Polycaprolactone Modified Cement-Based Material

Zhang

et al. 2022

Int J Concr Struct Mater

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With the continuous development of economy, engineering construction is developing towards deep high-stress area, and the problems of large-deformation engineering are becoming more and more serious. Anchoring grouting is a very effective support reinforcement method. The anchoring grouting materials used in the project are mainly cement paste and cement mortar. The characteristics of the grouting material have a decisive influence on the grouting effect. However, it is difficult for the existing grouting materials to satisfy the requirements of strength and deformation at the same time, and improvement is urgently needed. Polycaprolactone (PCL) is an organic polymer material of good engineering properties, including high ductility, good stability and strong impact resistance. In this paper, PCL was added as an auxiliary additive to cement-based materials innovatively, and the mechanical test and micro-test of PCL-cement-based materials were carried out. The results show that adding PCL can significantly increase the compressive strength of cement paste. By adjusting the content of PCL, the strength and ductility of cement mortar can be effectively improved. When the content of PCL is 15%, ideal high performance cement mortar material can be obtained. Anchor grouting is a very effective reinforcement and support method.

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Research Progress of Ring-opening Polymerization of ε-caprolactone Initiated by Degradable Biopolymers

Cited by 3 publications

References 0 publications

Ring-Opening Polymerization of Trimethylene Carbonate with Phosphazene Organocatalyst

Ring-Opening Polymerization of Trimethylene Carbonate with Phosphazene Organocatalyst

Ring opening polymerisation of ɛ-caprolactone with novel microwave magnetic heating and cyto-compatible catalyst

Study on Mechanical Properties of Polycaprolactone Modified Cement-Based Material

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