Designed Monomers and Polymers最新文献_第10页

Study on diffusion mechanism and failure behavior of epoxy coatings focusing on synergistic effect of temperature and water molecules. 基于温度和水分子协同效应的环氧涂料扩散机理和失效行为研究。

IF 1.6 4区化学

Designed Monomers and Polymers Pub Date : 2021-03-29 DOI: 10.1080/15685551.2021.1904581

Chao Yang, Qing Han, Anquan Wang, Wei Han, Liang Sun, Laishun Yang

{"title":"Study on diffusion mechanism and failure behavior of epoxy coatings focusing on synergistic effect of temperature and water molecules.","authors":"Chao Yang, Qing Han, Anquan Wang, Wei Han, Liang Sun, Laishun Yang","doi":"10.1080/15685551.2021.1904581","DOIUrl":"https://doi.org/10.1080/15685551.2021.1904581","url":null,"abstract":"The research on the diffusion of water in coatings has been a hot topic in many fields, such as chemistry, coating structure and hydrogen bonding. In this paper, DGEBA epoxy coating was used as a sample to explore the diffusion process of 3 wt.% NaCl solution at different temperatures. Two-stage diffusion was established by immersion experiment and MD simulation. The synergistic effect of temperature and water on DGEBA properties was revealed by FTIR method and adsorption-desorption cyclic testing. The results showed that as the temperature increased, the saturation water content in coatings increased. At different temperatures, the diffusion process of water presented two-phase characteristics, and the influence of temperature on the diffusion process was mainly manifested in the cross-linking density at higher locations. Based on the variation law of swelling coefficient in per unit time (24 h), the conditions for water-coating interaction and formation of water clusters in this paper were proposed. The synergistic effect of water and temperature on DGEBA properties was reflected in two aspects: at lower temperature (20 °C), water would only change the physical structure of the coatings, while the water broke the DGEBA chains at higher temperature (60 °C).","PeriodicalId":11170,"journal":{"name":"Designed Monomers and Polymers","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2021-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/15685551.2021.1904581","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"25569065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Synthesis of antibacterial polyether biguanide curing agent and its cured antibacterial epoxy resin. 抗菌聚醚双胍固化剂及其固化抗菌环氧树脂的合成。

IF 1.6 4区化学

Designed Monomers and Polymers Pub Date : 2021-03-18 DOI: 10.1080/15685551.2021.1900025

Rui Li, Guoxing Yang, Yudan Wang, Lijia Liu, Qiang Wang, Guan Wang, Xiao Ouyang

{"title":"Synthesis of antibacterial polyether biguanide curing agent and its cured antibacterial epoxy resin.","authors":"Rui Li, Guoxing Yang, Yudan Wang, Lijia Liu, Qiang Wang, Guan Wang, Xiao Ouyang","doi":"10.1080/15685551.2021.1900025","DOIUrl":"10.1080/15685551.2021.1900025","url":null,"abstract":"At present, bacteria continue to threaten human health, and the resistance of bacteria to antibiotics continues to increase, so the development of new antibacterial agents and antibacterial materials is increasingly important to ensure human health. In this paper, three polyether biguanide compounds with high antibacterial properties were synthesized by reacting polyetheramine T403 with o-tolylbiguanide, m-tolylbiguanide and p-tolylbiguanide (o-TTB, m-TTB and p-TTB), respectively. The antimicrobial performance of polyether biguanide against E. coli and S. aureus was evaluated using a minimum inhibitory concentration method, and the results showed that the synthesized polyether biguanide exhibited efficient and broad-spectrum antimicrobial effects. Among them, o-tolyl biguanide derivative o-TTB showed the best antimicrobial performance, with minimum inhibitory concentrations of 20 and 15 μg/mL against E. coli and S. aureus, respectively. Then, epoxy resin E51 was cured using the obtained TTB as a curing agent to prepare an epoxy resin with antibacterial properties. The inhibition of the growth of S. aureus by the cured o-TTB/E51 resin was investigated by incubating the cured epoxy resin with bacteria, and the results showed that the cured resin had a significant inhibitory effect on the growth of bacteria. The non-isothermal curing kinetics of the o-TTB/E51 system were investigated by differential scanning calorimetry (DSC) to determine the optimized curing reaction temperature, curing kinetic parameters and curing kinetics equation.","PeriodicalId":11170,"journal":{"name":"Designed Monomers and Polymers","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2021-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/ff/f1/TDMP_24_1900025.PMC7993382.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"25539867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of doped H, Br, Cu, Kr, Ge, As and Fe on structural features and bandgap of poly C13H8OS-X: a DFT calculation. 掺杂 H、Br、Cu、Kr、Ge、As 和 Fe 对聚 C13H8OS-X 结构特征和带隙的影响：DFT 计算。

IF 1.6 4区化学

Designed Monomers and Polymers Pub Date : 2021-02-02 DOI: 10.1080/15685551.2021.1877431

Trung Vu Quoc, La Trieu Duong, Van Duong Quoc, Tuan Tran Quoc, Dung Nguyen Trong, Stefan Talu

{"title":"Effect of doped H, Br, Cu, Kr, Ge, As and Fe on structural features and bandgap of poly C13H8OS-X: a DFT calculation.","authors":"Trung Vu Quoc, La Trieu Duong, Van Duong Quoc, Tuan Tran Quoc, Dung Nguyen Trong, Stefan Talu","doi":"10.1080/15685551.2021.1877431","DOIUrl":"10.1080/15685551.2021.1877431","url":null,"abstract":"Structural features such as the shape, the lattice constant, the bond length, the total energy per cell, and the energy bandgap (Eg) of C13H8OS-X are studied by the calculating Partial Density Of States (PDOS), and DOS package of the Material Studio (MS) software. Calculations show that the bond length and the bond angle between atoms insignificant change as 1.316 Å to 1.514 Å for C-C, 1.211 Å for C-O, 1.077 Å to 1.105 Å for C-H; bond angle of round one changes from 118.883° to 121.107° for C-C-C, from 117.199° to 122.635° for H-C-C, from 119.554° to 123.147° for C-C-O and from 109.956° to 117.537° for C-C-H. When C13H8OS-X doped in the order of -Br, -Cu, -Kr, -Ge, -As, and -Fe then bond lengths, bond angles between atoms have a nearly constant value. Particularly for links C-X, there is a huge change in value, respectively 1.876, 1.909, 10.675, 2.025, 2.016, 2.014 Å; the total energy change from Etot = -121,794 eV to Etot = -202,859 eV, and the energy band gap decreases from Eg = 2.001 eV to Eg = 0.915 eV. The obtained results are useful and serve as a basis for future experimental research.","PeriodicalId":11170,"journal":{"name":"Designed Monomers and Polymers","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2021-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7872542/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"25426298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Flame retardant and smoke-suppressant rigid polyurethane foam based on sodium alginate and aluminum diethylphosphite. 基于海藻酸钠和二乙基亚磷酸铝的阻燃和抑烟硬质聚氨酯泡沫。

IF 1.6 4区化学

Designed Monomers and Polymers Pub Date : 2021-01-31 DOI: 10.1080/15685551.2021.1879451

Wei Zhang, Zidong Zhao, Yun Lei

引用次数: 15

Nanocomposites containing titanium dioxide for environmental remediation. 环境修复用二氧化钛纳米复合材料。

IF 1.6 4区化学

Designed Monomers and Polymers Pub Date : 2021-01-20 DOI: 10.1080/15685551.2021.1876322

Soad Z Alsheheri

引用次数: 7

Synthesis and ethylene polymerization reaction of dendritic titanium catalysts. 枝晶钛催化剂的合成及乙烯聚合反应。

IF 1.6 4区化学

Designed Monomers and Polymers Pub Date : 2021-01-18 DOI: 10.1080/15685551.2020.1868666

Tianyu Lan, Liduo Chen, Na Zhang, Jun Wang

{"title":"Synthesis and ethylene polymerization reaction of dendritic titanium catalysts.","authors":"Tianyu Lan, Liduo Chen, Na Zhang, Jun Wang","doi":"10.1080/15685551.2020.1868666","DOIUrl":"https://doi.org/10.1080/15685551.2020.1868666","url":null,"abstract":"The 1.0 G dendrimer (C22H48N10O4),3,5-di-tert-butylsalicylaldehyde and TiCl4 · 2THF were used as the synthetic materials, and the dendritic salicylaldehyde imide ligand with substituent hindrance and its titanium catalyst were synthesized by the condensation reaction of schiff base. The structure of the synthesized products was characterized by infrared spectroscopy, nuclear magnetic resonance hydrogen spectroscopy, ultraviolet spectroscopy, electrospray mass spectrometry, and inductively coupled plasma mass spectrometry, The actual structure is consistent with the theoretical design structure. Activated methylaluminoxane (MAO) was used as a catalyst precursor for ethylene polymerization in the process of ethylene catalytic. The effects of ethylene polymerization were studied in terms of the Al/Ti molar ratio, reaction time, reaction temperature, polymerization pressure, and ligand structure of the catalyst. The results show at the reaction temperature of 25°C, the reaction time was 30 min, and the ethylene pressure was 1.0 MPa and Al/Ti was 1,000, the catalytic activity can reach 78.56 kg PE/(mol Ti.h). Furthermore, high-temperature GPC-IR, DSC, and torque rheometer were used to characterized the microstructure, thermal properties, and viscoelastic state of polyethylene samples obtained. The results showed that the product was ultra-high-molecular-weight polyethylene.","PeriodicalId":11170,"journal":{"name":"Designed Monomers and Polymers","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2021-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/15685551.2020.1868666","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"25329137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation and properties of Pue-loaded HA-ADH-PS nanomicelles. pue负载HA-ADH-PS纳米胶束的制备及性能研究。

IF 1.6 4区化学

Designed Monomers and Polymers Pub Date : 2021-01-17 DOI: 10.1080/15685551.2020.1860481

Huiru Wang, Yuanyuan Li, Yunpeng Min, Hang Zhang, Linkun Hao, Ru Zhang, Yunying Jiang, Yimin Song

{"title":"Preparation and properties of Pue-loaded HA-ADH-PS nanomicelles.","authors":"Huiru Wang, Yuanyuan Li, Yunpeng Min, Hang Zhang, Linkun Hao, Ru Zhang, Yunying Jiang, Yimin Song","doi":"10.1080/15685551.2020.1860481","DOIUrl":"https://doi.org/10.1080/15685551.2020.1860481","url":null,"abstract":"Puerarin (Pue) is the most abundant isoflavonoid in kudzu root. It has been widely used as a therapeutic agent for the treatment of cardiovascular diseases. However, poor-bioavailability of puerarin is the main obstacle to its widespread clinical applications. In this paper, HA-ADH-PS nanomicelles were prepared by chemical modification, noncovalent modification and etc, and characterized by means of FT-IR, ultraviolet (UV) and thermogravimetric analysis (TG). The encapsulation efficiency and drug loading of Pue-loaded HA-ADH-PS nanomicelles were 45.1% and 19.89% by UV, respectively. It could be observed from the transmission electron microscopy (TEM) images that HA-ADH-PS micelles appeared obvious spherical structure in the water. The particle size of HA-ADH-PS nanomicelles and Pue-loaded HA-ADH-PS nanomicelles were about 136.8 nm and 119.5 nm with a PDI of 0.237 and 0.272, respectively. The fluorescence probe method was used to characterize the critical micelle concentration, the critical micelle concentration (CMC) value of the nanomicells was 0.002 g/L and the results met the requirements and ensured the stability of micelles after dilution. DPPH assay suggested that Pue-loaded HA-ADH-PS nanomicelles had an obvious radical scavenging effect in vitro. MTT test showed that Pue-loaded HA-ADH-PS nanomicelles was non-toxic and had good biocompatibility. Thus, Pue-loaded HA-ADH-PS nanomicelles could be used as a potential drug carrier for puerarin.","PeriodicalId":11170,"journal":{"name":"Designed Monomers and Polymers","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2021-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/15685551.2020.1860481","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"25329136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Thermal stability enhancement of poly(hydroxybutyrate-co-hydroxyvalerate) through in situ reaction 原位反应增强聚羟基丁酸酯-羟基戊酸酯的热稳定性

IF 1.6 4区化学

Designed Monomers and Polymers Pub Date : 2021-01-01 DOI: 10.1080/15685551.2021.1914406

Pongsakorn Nuchanong, M. Seadan, R. Khankrua, S. Suttiruengwong

{"title":"Thermal stability enhancement of poly(hydroxybutyrate-co-hydroxyvalerate) through in situ reaction","authors":"Pongsakorn Nuchanong, M. Seadan, R. Khankrua, S. Suttiruengwong","doi":"10.1080/15685551.2021.1914406","DOIUrl":"https://doi.org/10.1080/15685551.2021.1914406","url":null,"abstract":"ABSTRACT Poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV) has recently caught more and more attention due to its renewability, good mechanical and barrier properties, as well as marine biodegradability. However, the severe thermal degradation during processing is a major drawback and limits its application. In this work, the thermal stability of PHBV during melt-processing was investigated by incorporating reactive agents. Various contents of Di(tert-butylperoxyisopropyl)benzene (DB), Triallyl isocyanurate (TAIC) and multi-functional epoxy chain extender (ECE) were used. The mixing torque, mechanical and thermal properties were studied. The results revealed that the mixing torque of PHBV gradually decreased during 10 min of melting time and eventually dropped to 2 N.m. Upon adding ECE, the mixing torque slightly increased but still decreased during 10 min period. For the system consisting of DB/TAIC or DB/TAIC/ECE, the mixing torque reached the equilibrium and their values were roughly twofold higher than PHBV alone. The possible crosslinking reaction and torque reversion were predominantly observed when adding high contents of DB and TAIC. 1 H NMR spectra suggested the reaction of DB/TAIC and PHBV. Young’s modulus and tensile strength of system consisting of DB at 0.3 phr, TAIC at 0.1 phr and ECE at 0.5 phr increased from 1440 and 40.4 MPa to 1803 and 55.5 MPa, respectively. TGA thermograms showed that the onset temperature and inflection point were improved when adding DB/TAIC and ECE. From the findings, it indicated that the combination of DB/TAIC and ECE was one of the simplest and effective ways to improve the melt viscosity without sacrificing the mechanical properties.","PeriodicalId":11170,"journal":{"name":"Designed Monomers and Polymers","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/15685551.2021.1914406","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48529958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Construction of poly(ethylene glycol)-poly(L-lactic acid)-stearic acid reverse aspirin-loaded micelles and optimization of preparation process. 聚乙二醇-聚l -乳酸-硬脂酸逆负载阿司匹林胶束的构建及制备工艺优化

IF 1.6 4区化学

Designed Monomers and Polymers Pub Date : 2020-11-23 DOI: 10.1080/15685551.2020.1845428

Yunpeng Min, Hang Zhang, Huiru Wang, Yimin Song

{"title":"Construction of poly(ethylene glycol)-poly(L-lactic acid)-stearic acid reverse aspirin-loaded micelles and optimization of preparation process.","authors":"Yunpeng Min, Hang Zhang, Huiru Wang, Yimin Song","doi":"10.1080/15685551.2020.1845428","DOIUrl":"https://doi.org/10.1080/15685551.2020.1845428","url":null,"abstract":"This work aims to study the construction of reverse aspirin-loaded micelles prepared from amphiphilic PEG-PLA-SA triblock copolymers and the optimization of the preparation process. Using polyethylene glycol (PEG) as the initiator, ring-opening polymerization of L-lactide (L-LA) was used to prepare PEG-PLA diblock copolymers. Final product PEG-PLA-SA triblock copolymers were prepared by the reaction of stearic acid (SA) and PEG-PLA catalyzed by 4-dimethylaminopyridine (DMAP) and N,N'-Dicyclohexylcarbodiimide (DCC). Fourier transform infrared spectrometer (FT-IR) was used to characterize the product structure. PEG-PLA-SA triblock copolymers self-assembled in toluene/ethanol/water system to form reverse micelles, which could encapsulate aspirin into a hydrophilic core. Dynamic light scattering (DLS) and transmission electron microscopy (TEM) were used to determine the size and morphology of reverse micelles. The results showed that the reverse micelles are spherical, with a particle size of less than 70 nm. Response surface analysis method was applied to optimize the preparation process of PEG-PLA-SA. In vitro drug release was achieved by embedding reverse aspirin-loaded micelles in the biocompatible membrane in phosphate buffer saline (PBS) at 37°C. In the first 8 h, the drug release rate of the triblock copolymers was slower than that of the diblock copolymers. After 8 h, the drug release rate of both tended to be flat. The stability of aspirin-loaded reverse micelles was studied through accelerated test. These results indicate that reverse micelle PEG-PLA-SA may be a promising carrier for hydrophilic drugs like aspirin.","PeriodicalId":11170,"journal":{"name":"Designed Monomers and Polymers","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2020-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/15685551.2020.1845428","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38366704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Preparation of amphiphilic magnetic polyvinyl alcohol targeted drug carrier and drug delivery research. 两亲性磁性聚乙烯醇靶向药物载体的制备及给药研究。

IF 1.6 4区化学

Designed Monomers and Polymers Pub Date : 2020-10-23 DOI: 10.1080/15685551.2020.1837442

Yazhen Wang, Zhen Shi, Yu Sun, Xueying Wu, Shuang Li, Shaobo Dong, Tianyu Lan

引用次数: 7