Latest Research and Developing Tendency of Hyperbranched Polymers Fabrication

2021 ◽  
Vol 896 ◽  
pp. 45-50
Author(s):  
Lian Yi Huo ◽  
Xue Tao Shi ◽  
Si Ming Chen ◽  
Meng Yao Zhang
Keyword(s):  
Reaction Mechanism ◽  
Ring Opening ◽  
Hyperbranched Polymers ◽  
Ring Opening Polymerization ◽  
Synthesis Process ◽  
Future Research ◽  
Advantages And Disadvantages ◽  
Environmental Friendly ◽  
High Efficient ◽  
The Future

Hyperbranched polymers (HBPs) have been applied in various fields because of its outstanding biodegradability and biocompatibility. At present, there are a variety of methods that are used to fabricate HBPs, such as polycondensation, reactive polymerization and ring-opening polymerization according to reaction mechanism. These methods are all environmental-friendly and high-efficient to generate HBPs, and are valuable for industrialization. In this work, we conclude some common methods of HBPs fabrication and make the comparison between them to analyze their advantages and disadvantages, which contribute in how to improve the synthesis process in the future research.

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

2020 ◽  
Vol 24 (13) ◽  
pp. 1507-1516
Author(s):  
Fenghong Li ◽  
Yan Shi ◽  
Pengzhen Li ◽  
Tianci Jiang
Keyword(s):  
Reaction Mechanism ◽  
Polylactic Acid ◽  
Future Development ◽  
Ring Opening ◽  
Preparation Method ◽  
Ring Opening Polymerization ◽  
Research Progress ◽  
Structure Characteristics ◽  
The Future

The article reviews the research progress in the preparation of polycaprolactone through the ring-opening polymerization of ε-caprolactone initiated by biopolymers in recent years. The structure characteristics of starch, cellulose, chitosan, polyhydroxyalkanoates, and polylactic acid, the reaction mechanism, the preparation method, and the application of ε-caprolactone are introduced. Finally, the future development of new polycaprolactone copolymers is prospected.

Controlling polymer stereochemistry in ring-opening polymerization: a decade of advances shaping the future of biodegradable polyesters

2021 ◽  
Author(s):  
Mathieu J.-L. Tschan ◽  
Régis M. Gauvin ◽  
Christophe M. Thomas
Keyword(s):  
Biodegradable Polymer ◽  
Ring Opening ◽  
Polymer Synthesis ◽  
Ring Opening Polymerization ◽  
Cyclic Esters ◽  
Biodegradable Polyesters ◽  
The Future ◽  
Recent Developments

In this review, we describe recent developments in biodegradable polymer synthesis with a focus on the use of discrete complexes and organocatalysts as active initiators for the stereocontrolled ring-opening polymerization of cyclic esters.

Growing Multihydroxyl Hyperbranched Polymers on the Surfaces of Carbon Nanotubes by in Situ Ring-Opening Polymerization

2004 ◽  
Vol 37 (24) ◽  
pp. 8846-8853 ◽  
Author(s):  
Youyong Xu ◽  
Chao Gao ◽  
Hao Kong ◽  
Deyue Yan ◽  
Yi Zheng Jin ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Ring Opening ◽  
Hyperbranched Polymers ◽  
Ring Opening Polymerization

Multicast Routing Protocols in Delay Tolerant Networks

2014 ◽  
Vol 614 ◽  
pp. 490-496
Author(s):  
Wen Hua Yin ◽  
Xiang Yu Bai ◽  
Xue Bin Ma
Keyword(s):  
Routing Protocols ◽  
Multicast Routing ◽  
Reference Value ◽  
Delay Tolerant Networks ◽  
Future Research ◽  
Advantages And Disadvantages ◽  
Network Bandwidth ◽  
The Future ◽  
Multicast Routing Protocols ◽  
Delay Tolerant

Delay Tolerant Networks (DTNs) are characterized by intermittent connectivity, frequent partitions and extremely high latency. As a result, multicast routing protocols are difficult to implement in DTNs. Multicast can not only save network bandwidth, but also can reduce communication cost and improve the efficiency of data transfer. In recent years, various multicast routing protocols are proposed for DTNs. In order to provide a comprehensive understanding of these multicast routing protocols designed for DTNs, a survey of the multicast routing protocols was discussed in this paper. We analyzed two types of multicast routing protocols: the knowledge-based multicast routing protocol and the probability-based multicast protocol. We conclude the future research directions by discussing the advantages and disadvantages of various multicast routing protocols for DTNs, and provide some reference value for the further studies of multicast routing protocols of DTNs. Furthermore, in order to resolve the existing problems of DTNs (such as energy optimization); we will propose a social-aware energy constrained multicast routing algorithm in the future.

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