101
|
Yang L, Hu X, Wang W, Liu S, Sun T, Huang Y, Jing X, Xie Z. Y-shaped block copolymer (methoxy-poly(ethylene glycol))2-b-poly(l-glutamic acid): preparation, self-assembly, and use as drug carriers. RSC Adv 2014. [DOI: 10.1039/c4ra07890j] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The nano polymer drugs based on Y-shaped block copolymer mPEG2-PGA show a great potential on the treatment for solid tumors.
Collapse
Affiliation(s)
- Lixin Yang
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022, People's Republic of China
| | - Xiuli Hu
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022, People's Republic of China
| | - Weiqi Wang
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022, People's Republic of China
- Graduate School of Chinese Academy of Sciences
| | - Shi Liu
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022, People's Republic of China
- Graduate School of Chinese Academy of Sciences
| | - Tingting Sun
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022, People's Republic of China
- Graduate School of Chinese Academy of Sciences
| | - Yubin Huang
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022, People's Republic of China
| | - Xiabin Jing
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022, People's Republic of China
| | - Zhigang Xie
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022, People's Republic of China
| |
Collapse
|
102
|
Southan A, Hoch E, Schönhaar V, Borchers K, Schuh C, Müller M, Bach M, Tovar GEM. Side chain thiol-functionalized poly(ethylene glycol) by post-polymerization modification of hydroxyl groups: synthesis, crosslinking and inkjet printing. Polym Chem 2014. [DOI: 10.1039/c4py00099d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Thiol functionalized PEG-based polymers were synthesized by post polymerization reactions of hydroxyl functionalized polymers. Applications of the polymers in cell culture and inkjet printing were demonstrated.
Collapse
Affiliation(s)
- Alexander Southan
- Institute of Interfacial Process Engineering and Plasma Technology IGVP
- University of Stuttgart
- 70569 Stuttgart, Germany
| | - Eva Hoch
- Institute of Interfacial Process Engineering and Plasma Technology IGVP
- University of Stuttgart
- 70569 Stuttgart, Germany
| | - Veronika Schönhaar
- Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB
- 70569 Stuttgart, Germany
| | - Kirsten Borchers
- Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB
- 70569 Stuttgart, Germany
| | - Christian Schuh
- Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB
- 70569 Stuttgart, Germany
| | - Michaela Müller
- Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB
- 70569 Stuttgart, Germany
| | - Monika Bach
- Institute of Interfacial Process Engineering and Plasma Technology IGVP
- University of Stuttgart
- 70569 Stuttgart, Germany
| | - Günter E. M. Tovar
- Institute of Interfacial Process Engineering and Plasma Technology IGVP
- University of Stuttgart
- 70569 Stuttgart, Germany
- Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB
- 70569 Stuttgart, Germany
| |
Collapse
|
103
|
Zhang H, Lin Y, Xu Y, Weng W. Mechanochemistry of Topological Complex Polymer Systems. Top Curr Chem (Cham) 2014; 369:135-207. [PMID: 25791486 DOI: 10.1007/128_2014_617] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Although existing since the concept of macromolecules, polymer mechanochemistry is a burgeoning field which attracts great scientific interest in its ability to bias conventional reaction pathways and its potential to fabricate mechanoresponsive materials. We review here the effect of topology on the mechanical degradation of polymer chains and the activation of mechanophores in polymer backbones. The chapter focuses on both experimental and theoretical work carried out in the past 70 years. After a general introduction (Sect. 1), where the concept, the history, and the application of polymer mechanochemistry are briefly described, flow fields to study polymer mechanochemistry are discussed (Sect. 2), results of mechanochemistry study are presented for linear polymers (Sect. 3), cyclic polymers (Sect. 4), graft polymers (Sect. 5), star-shaped polymers (Sect. 6), hyperbranched polymers and dendrimers (Sect. 7), and systems with dynamic topology (Sect. 8). Here we focus on (1) experimental results involving the topological effect on the coil-to-stretch transition and the fracture of the polymer chains, (2) the underlying mechanisms and the key factor that determines the mechanical stability of the macromolecules, (3) theoretical models that relate to the experimental observations, and (4) rational design of mechanophores in complex topology to achieve multiple activations according to the existing results observed in chain degradation.
Collapse
Affiliation(s)
- Huan Zhang
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China
| | - Yangju Lin
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China
| | - Yuanze Xu
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China
| | - Wengui Weng
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China.
| |
Collapse
|
104
|
Székely G, Schaepertoens M, Gaffney PRJ, Livingston AG. Iterative synthesis of monodisperse PEG homostars and linear heterobifunctional PEG. Polym Chem 2014. [DOI: 10.1039/c3py01367g] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
105
|
Chen J, Liu M. Amphiphilic block copolymer micelles with fluorescence as nano-carriers for doxorubicin delivery. RSC Adv 2014. [DOI: 10.1039/c3ra47026a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
106
|
The characterization of dendronized poly(ethylene glycol)s and poly(ethylene glycol) multi-arm stars using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. Anal Chim Acta 2014; 808:175-89. [DOI: 10.1016/j.aca.2013.09.038] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2013] [Revised: 09/15/2013] [Accepted: 09/18/2013] [Indexed: 01/29/2023]
|
107
|
Zhang B, Zhang H, Elupula R, Alb AM, Grayson SM. Efficient Synthesis of High Purity Homo-arm and Mikto-arm Poly(ethylene glycol) Stars Using Epoxide and Azide-Alkyne Coupling Chemistry. Macromol Rapid Commun 2013; 35:146-151. [DOI: 10.1002/marc.201300623] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Revised: 09/19/2013] [Indexed: 11/11/2022]
Affiliation(s)
- Boyu Zhang
- Department of Chemistry; Tulane University; New Orleans LA 70118 USA
| | - Hong Zhang
- Department of Chemistry; Tulane University; New Orleans LA 70118 USA
| | - Ravinder Elupula
- Department of Chemistry; Tulane University; New Orleans LA 70118 USA
| | - Alina M. Alb
- Department of Physics; Tulane University; New Orleans LA 70118 USA
| | - Scott M. Grayson
- Department of Chemistry; Tulane University; New Orleans LA 70118 USA
| |
Collapse
|
108
|
Docetaxel-loaded nanoparticles based on star-shaped mannitol-core PLGA-TPGS diblock copolymer for breast cancer therapy. Acta Biomater 2013; 9:8910-20. [PMID: 23816645 DOI: 10.1016/j.actbio.2013.06.034] [Citation(s) in RCA: 103] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Revised: 06/02/2013] [Accepted: 06/20/2013] [Indexed: 12/18/2022]
Abstract
A star-shaped biodegradable polymer, mannitol-core poly(d,l-lactide-co-glycolide)-d-α-tocopheryl polyethylene glycol 1000 succinate (M-PLGA-TPGS), was synthesized in order to provide a novel nanoformulation for breast cancer chemotherapy. This novel copolymer was prepared by a core-first approach via three stages of chemical reaction, and was characterized by nuclear magnetic resonance, gel permeation chromatography and thermogravimetric analysis. The docetaxel-loaded M-PLGA-TPGS nanoparticles (NPs), prepared by a modified nanoprecipitation method, were observed to be near-spherical shape with narrow size distribution. Confocal laser scanning microscopy showed that the uptake level of M-PLGA-TPGS NPs was higher than that of PLGA NPs and PLGA-TPGS NPs in MCF-7 cells. A significantly higher level of cytotoxicity was achieved with docetaxel-loaded M-PLGA-TPGS NPs than with commercial Taxotere®, docetaxel-loaded PLGA-TPGS and PLGA NPs. Examination of the drug loading and encapsulation efficiency proved that star-shaped M-PLGA-TPGS could carry higher levels of drug than linear polymer. The in vivo experiment showed docetaxel-loaded M-PLGA-TPGS NPs to have the highest anti-tumor efficacy. In conclusion, the star-like M-PLGA-TPGS copolymer shows potential as a promising drug-loaded biomaterial that can be applied in developing novel nanoformulations for breast cancer therapy.
Collapse
|
109
|
Jia M, Ren T, Wang A, Yuan W, Ren J. Amphiphilic star-shaped poly(ε-caprolactone)-block-poly(l-lysine) copolymers with porphyrin core: Synthesis, self-assembly, and cell viability assay. J Appl Polym Sci 2013. [DOI: 10.1002/app.40097] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Menghong Jia
- Institute of Nano and Bio-Polymeric Materials; School of Material Science and Engineering; Tongji University; Shanghai 201804 People's Republic of China
| | - Tianbin Ren
- Institute of Nano and Bio-Polymeric Materials; School of Material Science and Engineering; Tongji University; Shanghai 201804 People's Republic of China
- Key Laboratory of Advanced Civil Engineering Materials; Ministry of Education; Shanghai 201804 People's Republic of China
| | - An Wang
- Institute of Nano and Bio-Polymeric Materials; School of Material Science and Engineering; Tongji University; Shanghai 201804 People's Republic of China
| | - Weizhong Yuan
- Institute of Nano and Bio-Polymeric Materials; School of Material Science and Engineering; Tongji University; Shanghai 201804 People's Republic of China
- Key Laboratory of Advanced Civil Engineering Materials; Ministry of Education; Shanghai 201804 People's Republic of China
| | - Jie Ren
- Institute of Nano and Bio-Polymeric Materials; School of Material Science and Engineering; Tongji University; Shanghai 201804 People's Republic of China
- Key Laboratory of Advanced Civil Engineering Materials; Ministry of Education; Shanghai 201804 People's Republic of China
| |
Collapse
|
110
|
Nie SY, Sun Y, Lin WJ, Wu WS, Guo XD, Qian Y, Zhang LJ. Dissipative particle dynamics studies of doxorubicin-loaded micelles assembled from four-arm star triblock polymers 4AS-PCL-b-PDEAEMA-b-PPEGMA and their pH-release mechanism. J Phys Chem B 2013; 117:13688-97. [PMID: 24079339 DOI: 10.1021/jp407529u] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Dissipative particle dynamics (DPD) simulation was applied to investigate the microstructures of the micelles self-assembled from pH-sensitive four-arm star triblock poly(ε-caprolactone)-b-poly(2-(diethylamino)ethyl methacrylate)-b-poly(poly(ethylene glycol) methyl ether methacrylate) (4AS-PCL-b-PDEAEMA-b-PPEGMA). In the optimized system, the micelles have a core-mesosphere-shell three-layer structure. The drug-loading process and its distribution at different formulations in the micelles were studied. The results show that DOX molecules distributed in the core and the interface between the core and the mesosphere, suggesting the potential encapsulation capacity of DOX molecules. More drugs were loaded in the micelles with the increase in DOX, and the size of micelles became larger. However, some openings start to generate on the PEG shell when the DOX reaches a certain concentration. By changing the pH values of the system, different morphologies of the micelles were acquired after the pH-sensitive blocks PDEAEMA were protonated, the mechanism of which was also analyzed through correlating functions. The results indicated that the sudden increase in solubility parameter of the pH-sensitive blocks and the swelling of the micelles were the key factors on the change of morphologies. Furthermore, with the decrease in pH value, the number and size of the cracks on the surface of the micelles were larger, which may have a direct effect on the drug release. In conclusion, 4AS-PCL-b-PDEAEMA-b-PPEGMA has great promising applications in delivering hydrophobic anticancer drugs for improved cancer therapy.
Collapse
Affiliation(s)
- Shu Yu Nie
- School of Chemistry and Chemical Engineering, South China University of Technology , Wusan Street, Guangzhou 510640, P. R. China
| | | | | | | | | | | | | |
Collapse
|
111
|
Tang X, Cai S, Zhang R, Liu P, Chen H, Zheng Y, Sun L. Paclitaxel-loaded nanoparticles of star-shaped cholic acid-core PLA-TPGS copolymer for breast cancer treatment. NANOSCALE RESEARCH LETTERS 2013; 8:420. [PMID: 24134303 PMCID: PMC3874754 DOI: 10.1186/1556-276x-8-420] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2013] [Accepted: 10/04/2013] [Indexed: 05/15/2023]
Abstract
A system of novel nanoparticles of star-shaped cholic acid-core polylactide-d-α-tocopheryl polyethylene glycol 1000 succinate (CA-PLA-TPGS) block copolymer was developed for paclitaxel delivery for breast cancer treatment, which demonstrated superior in vitro and in vivo performance in comparison with paclitaxel-loaded poly(d,l-lactide-co-glycolide) (PLGA) nanoparticles and linear PLA-TPGS nanoparticles. The paclitaxel- or couramin 6-loaded nanoparticles were fabricated by a modified nanoprecipitation method and then characterized in terms of size, surface charge, surface morphology, drug encapsulation efficiency, and in vitro drug release. The CA-PLA-TPGS nanoparticles were found to be spherical in shape with an average size of around 120 nm. The nanoparticles were found to be stable, showing no change in the particle size and surface charge during 90-day storage of the aqueous solution. The release profiles of the paclitaxel-loaded nanoparticles exhibited typically biphasic release patterns. The results also showed that the CA-PLA-TPGS nanoparticles have higher antitumor efficacy than the PLA-TPGS nanoparticles and PLGA nanoparticles in vitro and in vivo. In conclusion, such nanoparticles of star-shaped cholic acid-core PLA-TPGS block copolymer could be considered as a potentially promising and effective strategy for breast cancer treatment.
Collapse
Affiliation(s)
- Xiaolong Tang
- Stem Cell Engineering and Technology Research Center, School of Medicine, Anhui University of Science and Technology, Huainan 232001, China
- Nankai Hospital, Nankai Clinical School, Tianjin Medical University, Tianjin 300100, China
| | - Shuyu Cai
- Stem Cell Engineering and Technology Research Center, School of Medicine, Anhui University of Science and Technology, Huainan 232001, China
| | - Rongbo Zhang
- Stem Cell Engineering and Technology Research Center, School of Medicine, Anhui University of Science and Technology, Huainan 232001, China
| | - Peng Liu
- Stem Cell Engineering and Technology Research Center, School of Medicine, Anhui University of Science and Technology, Huainan 232001, China
| | - Hongbo Chen
- The Shenzhen Key Laboratory of Gene and Antibody Therapy, Division of Life Sciences, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
| | - Yi Zheng
- The Shenzhen Key Laboratory of Gene and Antibody Therapy, Division of Life Sciences, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
| | - Leilei Sun
- The Shenzhen Key Laboratory of Gene and Antibody Therapy, Division of Life Sciences, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
- Northeastern University, Boston, MA 02115, USA
| |
Collapse
|
112
|
Micic M, Suljovrujic E. Network parameters and biocompatibility of p(2-hydroxyethyl methacrylate/itaconic acid/oligo(ethylene glycol) acrylate) dual-responsive hydrogels. Eur Polym J 2013. [DOI: 10.1016/j.eurpolymj.2013.06.026] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
113
|
Synthesis and Solution Properties of Double Hydrophilic Poly(ethylene oxide)-block-poly(2-ethyl-2-oxazoline) (PEO-b-PEtOx) Star Block Copolymers. Polymers (Basel) 2013. [DOI: 10.3390/polym5031081] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
|
114
|
Sokolovskaya E, Yoon J, Misra AC, Bräse S, Lahann J. Controlled Microstructuring of Janus Particles Based on a Multifunctional Poly(ethylene glycol). Macromol Rapid Commun 2013; 34:1554-9. [DOI: 10.1002/marc.201300427] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Revised: 07/14/2013] [Indexed: 12/13/2022]
Affiliation(s)
- Ekaterina Sokolovskaya
- Institute of Functional Interfaces (IFG); Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1; 76344; Eggenstein-Leopoldshafen; Germany
| | - Jaewon Yoon
- Biointerfaces Institute, Chemical Engineering, Biomedical Engineering and Macromolecular Science and Engineering; University of Michigan; 2800 Plymouth Rd.; Ann Arbor; MI; USA
| | - Asish C. Misra
- Biointerfaces Institute, Chemical Engineering, Biomedical Engineering and Macromolecular Science and Engineering; University of Michigan; 2800 Plymouth Rd.; Ann Arbor; MI; USA
| | | | | |
Collapse
|
115
|
Chen Q, Cao X, Xu Y, An Z. Emerging Synthetic Strategies for Core Cross-Linked Star (CCS) Polymers and Applications as Interfacial Stabilizers: Bridging Linear Polymers and Nanoparticles. Macromol Rapid Commun 2013; 34:1507-17. [DOI: 10.1002/marc.201300487] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2013] [Revised: 07/18/2013] [Indexed: 12/26/2022]
Affiliation(s)
- Qijing Chen
- Institute of Nanochemistry and Nanobiology, College of Environmental and Chemical Engineering; Shanghai University; Shanghai 200444 P. R. China
| | - Xueteng Cao
- Institute of Nanochemistry and Nanobiology, College of Environmental and Chemical Engineering; Shanghai University; Shanghai 200444 P. R. China
| | - Yuanyuan Xu
- Institute of Nanochemistry and Nanobiology, College of Environmental and Chemical Engineering; Shanghai University; Shanghai 200444 P. R. China
| | - Zesheng An
- Institute of Nanochemistry and Nanobiology, College of Environmental and Chemical Engineering; Shanghai University; Shanghai 200444 P. R. China
| |
Collapse
|
116
|
Cholic acid-functionalized nanoparticles of star-shaped PLGA-vitamin E TPGS copolymer for docetaxel delivery to cervical cancer. Biomaterials 2013; 34:6058-67. [DOI: 10.1016/j.biomaterials.2013.04.052] [Citation(s) in RCA: 222] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Accepted: 04/07/2013] [Indexed: 01/12/2023]
|
117
|
Moeinzadeh S, Barati D, Sarvestani SK, Karaman O, Jabbari E. Nanostructure formation and transition from surface to bulk degradation in polyethylene glycol gels chain-extended with short hydroxy acid segments. Biomacromolecules 2013; 14:2917-28. [PMID: 23859006 DOI: 10.1021/bm4008315] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Degradable, in situ gelling, inert hydrogels with tunable properties are very attractive as a matrix for cell encapsulation and delivery to the site of regeneration. Cell delivery is generally limited by the toxicity of gelation and degradation reactions. The objective of this work was to investigate by simulation and experimental measurement gelation kinetics and degradation rate of star acrylated polyethylene glycol (PEG) macromonomers chain-extended with short hydroxy acid (HA) segments (SPEXA) as a function of HA monomer type and number of HA repeat units. HA monomers included least hydrophobic glycolide (G), lactide (L), p-dioxanone (D), and most hydrophobic ε-caprolactone (C). Chain extension of PEG with short HA segments resulted in micelle formation for all HA types. There was a significant decrease in gelation time of SPEXA precursor solutions with HA chain-extension for all HA types due to micelle formation, consistent with the simulated increase in acrylate-acrylate (Ac-Ac) and Ac-initiator integration numbers. The hydrolysis rate of SPEXA hydrogels was strongly dependent on HA type and number of HA repeat units. SPEXA gels chain-extended with the least hydrophobic glycolide completely degraded within days, lactide within weeks, and p-dioxanone and ε-caprolactone degraded within months. The wide range of degradation rates observed for SPEXA gels can be explained by large differences in equilibrium water content of the micelles for different HA monomer types. A biphasic relationship between HA segment length and gel degradation rate was observed for all HA monomers, which was related to the transition from surface (controlled by HA segment length) to bulk (controlled by micelle equilibrium water content) hydrolysis within the micelle phase. To our knowledge, this is the first report on transition from surface to bulk degradation at the nanoscale in hydrogels.
Collapse
Affiliation(s)
- Seyedsina Moeinzadeh
- Biomimetic Materials and Tissue Engineering Laboratories, Department of Chemical Engineering, University of South Carolina, Columbia, 29208, United States
| | | | | | | | | |
Collapse
|
118
|
Liu SL, Shao L, Chua ML, Lau CH, Wang H, Quan S. Recent progress in the design of advanced PEO-containing membranes for CO2 removal. Prog Polym Sci 2013. [DOI: 10.1016/j.progpolymsci.2013.02.002] [Citation(s) in RCA: 186] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
119
|
Brocas AL, Mantzaridis C, Tunc D, Carlotti S. Polyether synthesis: From activated or metal-free anionic ring-opening polymerization of epoxides to functionalization. Prog Polym Sci 2013. [DOI: 10.1016/j.progpolymsci.2012.09.007] [Citation(s) in RCA: 188] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
|
120
|
|
121
|
Synthesis, characterization and pH-Responsive self-assembly behavior of amphiphilic multiarm star triblock copolymers based on PCL, PDEAEMA, and PEG. Macromol Res 2013. [DOI: 10.1007/s13233-013-1133-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
122
|
EVOLUTION OF CRYSTAL PATTERNS OF SINGLE-LAYER LAMELLAE OF STAR-SHAPED PEO SAMPLES. ACTA POLYM SIN 2013. [DOI: 10.3724/sp.j.1105.2013.12330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
123
|
Synthesis and characterization of pH-Responsive block copolymers with primary amine groups. Chem Res Chin Univ 2013. [DOI: 10.1007/s40242-013-2193-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
124
|
SYNTHESIS OF STAR-COMB COPOLYMER PB-<I>g</I>-PMMA BY MECHANISM TRANSFORMATION. ACTA POLYM SIN 2013. [DOI: 10.3724/sp.j.1105.2013.12221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
125
|
Bapat AP, Ray JG, Savin DA, Sumerlin BS. Redox-Responsive Dynamic-Covalent Assemblies: Stars and Miktoarm Stars. Macromolecules 2013. [DOI: 10.1021/ma400169m] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Abhijeet P. Bapat
- Department
of Chemistry, Southern Methodist University, 3215 Daniel Avenue,
Dallas, Texas 75275-0314, United States
| | - Jacob G. Ray
- School of Polymers and High
Performance Materials, The University of Southern Mississippi, Hattiesburg, Mississippi 39406, United States
| | - Daniel A. Savin
- School of Polymers and High
Performance Materials, The University of Southern Mississippi, Hattiesburg, Mississippi 39406, United States
| | - Brent S. Sumerlin
- Department
of Chemistry, Southern Methodist University, 3215 Daniel Avenue,
Dallas, Texas 75275-0314, United States
- George & Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science and Engineering, Department of Chemistry, University of Florida, PO Box 117200, Gainesville, Florida 32611-7200, United States
| |
Collapse
|
126
|
|
127
|
Eren O, Gorur M, Keskin B, Yilmaz F. Synthesis and characterization of ferrocene end-capped poly(ε-caprolactone)s by a combination of ring-opening polymerization and “click” chemistry techniques. REACT FUNCT POLYM 2013. [DOI: 10.1016/j.reactfunctpolym.2012.10.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
128
|
McNamee KP, Pitet LM, Knauss DM. Synthesis, assembly, and cross-linking of polymer amphiphiles in situ: polyurethane–polylactide core–shell particles. Polym Chem 2013. [DOI: 10.1039/c3py00030c] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
|
129
|
|
130
|
Janvier F, Zhu JXX, Armstrong J, Meiselman HJ, Cloutier G. Effects of amphiphilic star-shaped poly(ethylene glycol) polymers with a cholic acid core on human red blood cell aggregation. J Mech Behav Biomed Mater 2012; 18:100-7. [PMID: 23262308 DOI: 10.1016/j.jmbbm.2012.11.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2012] [Revised: 11/15/2012] [Accepted: 11/20/2012] [Indexed: 10/27/2022]
Abstract
Elevated red blood cell (RBC) aggregation increases low-shear blood viscosity and is closely related to several pathophysiological diseases such as atherosclerosis, thrombosis, diabetes, hypertension, cancer, and hereditary chronic hemolytic conditions. Non-ionic linear polymers such as poly(ethylene glycol) (PEG) and Pluronic F68 have shown inhibitory effects against RBC aggregation. However, hypersensitivity reactions in some individuals, attributed to a diblock component of Pluronic F68, have been reported. Therefore, we investigated the use of an amphiphilic star-shaped PEG polymer based on a cholic acid core as a substitute for Pluronics to reduce RBC aggregation. Cholic acid is a natural bile acid produced in the human liver and therefore should assure biocompatibility. Cholic acid based PEG polymers, termed CA(PEG)(4), were synthesized by anionic polymerization. Size exclusion chromatography indicated narrow mass distributions and hydrodynamic radii less than 2 nm were calculated. The effects of CA(PEG)(4) on human RBC aggregation and blood viscosity were investigated and compared to linear PEGs by light transmission aggregometry. Results showed optimal reduction of RBC aggregation for molar masses between 10 and 16 kDa of star-shaped CA(PEG)(4) polymers. Cholic acid based PEG polymers affect the rheology of erythrocytes and may find applications as alternatives to linear PEG or Pluronics to improve blood fluidity.
Collapse
Affiliation(s)
- Florence Janvier
- Laboratory of Biorheology and Medical Ultrasonics, University of Montreal Hospital Research Center (CRCHUM), Montréal, Québec, Canada H2L 2W5
| | | | | | | | | |
Collapse
|
131
|
Xing J, Tan L, Cao F, Wang Y. Synthesis of star polymer poly(ethylene glycol)3-poly(N,N-dimethyl acrylamide) and its application in protein resistance and separation. J Appl Polym Sci 2012. [DOI: 10.1002/app.38559] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
132
|
Jiang J, Liu Y, Gong Y, Shu Q, Yin M, Liu X, Chen M. pH-induced outward movement of star centers within coumarin-centered star-block polymer micelles. Chem Commun (Camb) 2012; 48:10883-5. [PMID: 23033171 DOI: 10.1039/c2cc35680e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
A novel coumarin-centered amphiphilic star-block polymer of C-(PDMAEMA(80)-b-PS(8))(3) has been designed to investigate the pH-induced accompanying outward movement of hydrophobic coumarin centers within the polymer micelles upon protonation.
Collapse
Affiliation(s)
- Jinqiang Jiang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an, Shaanxi, 710062, China.
| | | | | | | | | | | | | |
Collapse
|
133
|
Wilms D, Schömer M, Wurm F, Hermanns MI, Kirkpatrick CJ, Frey H. Hyperbranched PEG by random copolymerization of ethylene oxide and glycidol. Macromol Rapid Commun 2012; 31:1811-5. [PMID: 21567598 DOI: 10.1002/marc.201000329] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The synthesis of hyperbranched poly(ethylene glycol) (hbPEG) in one step was realized by random copolymerization of ethylene oxide and glycidol, leading to a biocompatible, amorphous material with multiple hydroxyl functionalities. A series of copolymers with moderate polydispersity ($\overline {M} _{{\rm w}} /\overline {M} _{{\rm n}} $ < 1.8) was obtained with varying glycidol content (3-40 mol-%) and molecular weights up to 49 800 g mol(-1) . The randomly branched structure of the copolymers was confirmed by (1) H and (13) C NMR spectroscopy and thermal analysis (differential scanning calorimetry). MTS assay demonstrated low cell toxicity of the hyperbranched PEG, comparable to the highly established linear PEG.
Collapse
Affiliation(s)
- Daniel Wilms
- Institute of Organic Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, D-55099 Mainz, Germany
| | | | | | | | | | | |
Collapse
|
134
|
Makrocka-Rydzyk M, Wegner K, Szutkowski K, Kozak M, Jurga S, Gao H, Matyjaszewski K. Morphology and NMR Self-Diffusion in PBA/PEO Miktoarm Star Copolymers. Z PHYS CHEM 2012. [DOI: 10.1524/zpch.2012.0300] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
Morphology and NMR self-diffusion of two miktoarm star copolymers differing in fraction of poly(n-butyl acrylate) and poly(ethylene oxide) (PBA and PEO) arms were under investigation. Structural characteristics of copolymers was obtained on the basis of Small Angle X-Ray Scattering (SAXS) investigations. The phase separated nanoscale morphology of the miktoarm star copolymer with a high fraction of PEO arms was confirmed by Scanning Probe Microscopy (SPM) studies. The modified Avrami approach was used to obtain the information on the non-isothermal crystallization kinetics of the studied systems. It was observed that the crystallization in the system with a higher content of PBA, occurring at higher undercooling, was characterized by a higher crystallization rate. It was also found that increase in PBA arms fraction leads to the reduction in the size of PEO domains. The activation energy of the crystallization process, estimated with Kissinger's method, is lower for miktoarm star copolymer with higher PBA content, which results from facilitation of the transport of PEO chains in the direction of the growing crystal due to the presence of mobile PBA arms. The self-diffusion studies of miktoarm star copolymers melts, carried out with the Pulsed-Gradient STimulated-Echo (PGSTE) Nuclear Magnetic Resonance (NMR) technique, reveals the existence of at least two types of diffusion mechanisms in these systems.
Collapse
Affiliation(s)
| | - Katarzyna Wegner
- Adam Mickiewicz University, NanoBioMedical Centre, Poznán, Polen
| | - Kosma Szutkowski
- Adam Mickiewicz University, Department of Macromolecular Physics, Poznán, Polen
| | - Maciej Kozak
- Adam Mickiewicz University, Department of Macromolecular Physics, Poznán, Polen
| | | | - Haifeng Gao
- Carnegie Mellon University, Department of Chemistry, Pittsburgh, Pennsylvania, U.S.A
| | | |
Collapse
|
135
|
Pozza GME, Harris H, Barthel MJ, Vitz J, Schubert US, Lutz PJ. Macromonomers as Well-Defined Building Blocks in the Synthesis of Hybrid Octafunctional Star-Shaped Poly(ethylene oxide)s. MACROMOL CHEM PHYS 2012. [DOI: 10.1002/macp.201200292] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
136
|
A review on comb-shaped amphiphilic polymers for hydrophobic drug solubilization. Ther Deliv 2012; 3:59-79. [PMID: 22833933 DOI: 10.4155/tde.11.130] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Comb-shaped amphiphilic polymers are rapidly emerging as an alternative approach to amphiphilic block copolymers for hydrophobic drug solubilization. These polymers consist of a homopolymer or copolymer backbone to which hydrophobic and hydrophilic pendant groups can be grafted resulting in a comb-like architecture. The hydrophobic pendants may consist of homopolymers, copolymers and other low-molecular weight hydrophobic structures. In this review, we focus on hydrophobically modified preformed homopolymers. Comb-shaped amphiphilic polymers possess reduced critical aggregation concentration values compared with traditional surfactant micelles indicating increased stability with decreased disruption experienced on dilution. They have been fabricated with diverse architectures and multifunctional properties such as site-specific targeting and external stimuli-responsive nature. The application of comb-shaped amphiphilic polymers is expanding; here we report on the progress achieved so far in hydrophobic drug solubilization for both intravenous and oral delivery.
Collapse
|
137
|
Wang D, Wang WJ, Li BG, Zhu S. Semibatch RAFT polymerization for branched polyacrylamide production: Effect of divinyl monomer feeding policies. AIChE J 2012. [DOI: 10.1002/aic.13890] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Dunming Wang
- State Key Laboratory of Chemical Engineering; Institute of Polymerization and Polymer Engineering; Dept. of Chemical and Biological Engineering; Zhejiang University; Hangzhou; Zhejiang; 310027; P.R. China
| | - Wen-Jun Wang
- State Key Laboratory of Chemical Engineering; Institute of Polymerization and Polymer Engineering; Dept. of Chemical and Biological Engineering; Zhejiang University; Hangzhou; Zhejiang; 310027; P.R. China
| | - Bo-Geng Li
- State Key Laboratory of Chemical Engineering; Institute of Polymerization and Polymer Engineering; Dept. of Chemical and Biological Engineering; Zhejiang University; Hangzhou; Zhejiang; 310027; P.R. China
| | - Shiping Zhu
- Dept. of Chemical Engineering; McMaster University; Hamilton; ON; Canada; L8S 4L7
| |
Collapse
|
138
|
Zhang H, Yan Q, Kang Y, Zhou L, Zhou H, Yuan J, Wu S. Fabrication of thermo-responsive hydrogels from star-shaped copolymer with a biocompatible β-cyclodextrin core. POLYMER 2012. [DOI: 10.1016/j.polymer.2012.05.059] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
139
|
Moeinzadeh S, Barati D, He X, Jabbari E. Gelation characteristics and osteogenic differentiation of stromal cells in inert hydrolytically degradable micellar polyethylene glycol hydrogels. Biomacromolecules 2012; 13:2073-86. [PMID: 22642902 DOI: 10.1021/bm300453k] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The use of poly(ethylene glycol) (PEG) hydrogels in tissue engineering is limited by their persistence in the site of regeneration. In an attempt to produce inert hydrolytically degradable PEG-based hydrogels, star (SPELA) poly(ethylene glycol-co-lactide) acrylate macromonomers with short lactide segments (<15 lactides per macromonomer) were synthesized. The SPELA hydrogel was characterized with respect to gelation time, modulus, water content, sol fraction, degradation, and osteogenic differentiation of encapsulated marrow stromal cells (MSCs). The properties of SPELA hydrogel were compared with those of the linear poly(ethylene glycol-co-lactide) acrylate (LPELA). The SPELA hydrogel had higher modulus, lower water content, and lower sol fraction than the LPELA. The shear modulus of SPELA hydrogel was 2.2 times higher than LPELA, whereas the sol fraction of SPELA hydrogel was 5 times lower than LPELA. The degradation of SPELA hydrogel depended strongly on the number of lactide monomers per macromonomer (nL) and showed a biphasic behavior. For example, as nL increased from 0 to 3.4, 6.4, 11.6, and 14.8, mass loss increased from 7 to 37, 80, 100% and then deceased to 87%, respectively, after 6 weeks of incubation. The addition of 3.4 lactides per macromonomer (<10 wt % dry macromonomer or <2 wt % swollen hydrogel) increased mass loss to 50% after 6 weeks. Molecular dynamic simulations demonstrated that the biphasic degradation behavior was related to aggregation and micelle formation of lactide monomers in the macromonomer in aqueous solution. MSCs encapsulated in SPELA hydrogel expressed osteogenic markers Dlx5, Runx2, osteopontin, and osteocalcin and formed a mineralized matrix. The expression of osteogenic markers and extent of mineralization was significantly higher when MSCs were encapsulated in SPELA hydrogel with the addition of bone morphogenetic protein-2 (BMP2). Results demonstrate that hydrolytically degradable PEG-based hydrogels are potentially useful as a delivery matrix for stem cells in regenerative medicine.
Collapse
Affiliation(s)
- Seyedsina Moeinzadeh
- Department of Chemical Engineering, University of South Carolina, Columbia, South Carolina 29208, United States
| | | | | | | |
Collapse
|
140
|
Kim DG, Sohn HS, Kim SK, Lee A, Lee JC. Star-shaped polymers having side chain poss groups for solid polymer electrolytes; synthesis, thermal behavior, dimensional stability, and ionic conductivity. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26151] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
141
|
Lee DI, Kim CJ, Lee CH, Ahn IS. Synthesis of a fluorescent and star-shaped 4-arm PEG with different functional groups at its ends. J IND ENG CHEM 2012. [DOI: 10.1016/j.jiec.2012.01.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
142
|
Petrova S, Kolev I, Miloshev S, Apostolova MD, Mateva R. Synthesis of amphiphilic [PEO(PCL)₂] triarm star-shaped block copolymers: a promising system for in cell delivery. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2012; 23:1225-1234. [PMID: 22415360 DOI: 10.1007/s10856-012-4592-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2011] [Accepted: 02/15/2012] [Indexed: 05/31/2023]
Abstract
The paper reports on a simple method of synthesizing [PEO(PCL)(2)] triarm star-shaped copolymers by a combination of Michael-addition type reaction and ring-opening polymerization. A Michael-addition reaction yielded a PEO end-capped by two hydroxyl groups-a [PEO(OH)(2)] macroinitiator-which was used for sequential building of PCL blocks. The macroinitiator and copolymers were analyzed by FTIR, (1)H NMR spectroscopy and SEC. The self-assembly behavior of the copolymers in aqueous media was studied by UV-Vis spectroscopy. The size and morphology of the obtained micelles were determined by TEM. None of the polymers had cytotoxic effects in vitro. Cellular uptake studies showed the accumulation of neutral red loaded micelles in the perinuclear area of human hepatocellular carcinoma cells revealing a cellular uptake associated with macropinocytosis and caveolae mediated endocytosis. The accumulation had a sustained effect over 3 days pointing at the potential application of the copolymers micelles as a drug delivery system.
Collapse
Affiliation(s)
- Svetlana Petrova
- Institute of Polymers, Bulgarian Academy of Sciences, Acad. G. Bonchev str., bl. 103-A, 1113 Sofia, Bulgaria
| | | | | | | | | |
Collapse
|
143
|
Harada A, Kato T, Kawamura A, Kojima C, Kono K. Effect of Enzyme Modification by Well-Defined Multi-Armed Poly(Ethylene Glycol) Synthesized Using Polyamidoamine Dendron. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 22:1551-61. [DOI: 10.1163/092050610x514557] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Atsushi Harada
- a Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan.
| | - Takeshi Kato
- b Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Akifumi Kawamura
- c Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Chie Kojima
- d Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Kenji Kono
- e Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| |
Collapse
|
144
|
Huang K, Huang J, Pan M, Wang G, Huang J. Synthesis of amphiphilic A2B star-shaped copolymers of polystyrene-b-[poly(ethylene oxide)]2 via atom transfer nitroxide radical coupling. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26037] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
|
145
|
Synthesis and characterization of pH-responsive diblock copolymers with cadaverine side groups. Colloid Polym Sci 2012. [DOI: 10.1007/s00396-012-2629-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
|
146
|
Mangold C, Wurm F, Frey H. Functional PEG-based polymers with reactive groups via anionic ROP of tailor-made epoxides. Polym Chem 2012. [DOI: 10.1039/c2py00489e] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
|
147
|
Zou P, Suo J, Nie L, Feng S. Temperature-responsive biodegradable star-shaped block copolymers for vaginal gels. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm15541a] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
148
|
Bapat AP, Ray JG, Savin DA, Hoff EA, Patton DL, Sumerlin BS. Dynamic-covalent nanostructures prepared by Diels–Alder reactions of styrene-maleic anhydride-derived copolymers obtained by one-step cascade block copolymerization. Polym Chem 2012. [DOI: 10.1039/c2py20351k] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
|
149
|
Lin FS, Chien CT, Chiu WC, Lin SY, Tseng FG, Hwu Y, Yang CS. Chemical auxiliary-free polymerization yielding non-linear PEG for protein-resistant application. RSC Adv 2012. [DOI: 10.1039/c2ra20117h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
150
|
Li H, Li Z, Wu L, Liu F, Zhou J, Luan M, Yu M, Wei L. Water-soluble starlike poly(acrylic acid) graft polymer: preparation and application as templates for silver nanoclusters. Polym Bull (Berl) 2011. [DOI: 10.1007/s00289-011-0677-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
|