Polymer-Plastics Technology and Materials
·
2020
·
IF 0
Yang Pan,Guangfeng Wu,Huifang Ma,Shujie Zhou,Huixuan Zhang
Herein, graft-modified ethylene-1-octene copolymer (POE-g-GMA) and styrene-butadiene-styrene triblock copolymer (SBS-g-GMA) were found to be excellent reactive compatibilizers for immiscible poly(ethylene terephthalate) (PET)/high-density polyethylene (HDPE) blends via in-situ reaction compatibilization. With increase in compatibilizer amount, uniform phase morphology was observed in all the blends. Thus, exhibiting enhanced mechanical properties, especially, the notched Izod impact strength. In comparison with SBS-g-GMA, compatibilizer POE-g-GMA demonstrated greater impact on the compatibility. The addition of 15% POE-g-GMA produced blends with best mechanical properties. Besides, both POE-g-GMA and SBS-g-GMA enhanced the melt viscosity of PET/HDPE blends.
研究领域:
材料科学
·
聚合物工程
✓ 已验证
产品关联
DOI
COMPOSITES COMMUNICATIONS
·
2021
·
IF 6.617
Ping Wang,Li Yang,Yiyang Zhou,Shang Gao,Tian Cao,Shaojie Feng,Pei Xu,Yunsheng Ding
Hydroxylated BaTiO 3 (BT-OH) and multiwalled carbon nanotubes (MWCNTs) were incorporated into polyamide (PA) and ethylene-vinyl-acetate-glycidyl methacrylate random terpolymer (EVA-GMA) blends by melting-blend and hot-pressing method. Compared with PA/EVA-GMA/C nanocomposites, PA/EVA-GMA/20B/C nanocomposites exhibited higher dielectric permittivity, originating from the high dielectric constant of BT-OH and remarkable interface polarization effect between polymer and two types of nanofillers. Moreover, the nonconducting BT-OH can prevent the conductive path of MWCNTs and support low loss tangent. The dielectric constant of PA/EVA-GMA/20B/4C was 31.5 at 100 Hz, approximately three times higher than that of PA/EVA-GMA, and the loss factor was only 0.18, close to that of PA/EVA-GMA. PA/EVA-GMA/20B/4C exhibited tensile strength and elongation at break of 27.7 MPa and 67.9%, respectively. The mechanical and dielectric properties of PA/EVA-GMA/20B/4C were synergistically improved.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
POLYMER SCIENCE SERIES A
·
2019
·Vol. 61
·期 3
·317-324
·
IF 0.984
Ting Gu,Zhu Dayong,Lu Yue,Lu Shengjun
Abstract Polylactic acid (PLA) and poly(butylene adipate- co -terephthalate) (PBAT) were blended in a twin-screw extruder with a compatibilizer of PLA grafted using glycidyl methacrylate (PLA- g -GMA), providing PLA- g -GMA/PLA/PBAT composites. The chemical structures of the composites were determined using Fourier-transform infrared spectroscopy (FTIR). The effects of the PLA- g -GMA amount on the thermal properties, rheological performance, and mechanical behavior of the composites were studied through differential scanning calorimetry (DSC) using an advanced rheometer and material testing machine. The results revealed that the reaction between the PLA/PBAT and epoxy groups within the PLA- g -GMA promotes an entanglement between molecular chains, which increases the glass transition temperature T g , cold crystallization temperature T c , and melting temperature T m of the samples. Moreover, the PLA- g -GMA/PLA/PBAT composites show higher tensile and notch impact strengths than PLA/PBAT.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2017
·Vol. 5
·期 20
·3697-3705
·
IF 4.543
Changjiao Yan,Tiehong Yang,Sikai Zhu,Hong Wu
Immediate hemorrhage control without secondary injury is pivotal for saving lives. In this study, polymerized glycidyl methacrylate derivative dextran/acrylic acid (poly(DEX-GMA/AAc)) microgel particles were prepared via emulsion polymerization method as a hemostatic agent. Microgel particles with size distribution of 500–800 nm were chosen because they showed more appropriate characteristics of swelling ratio and gelation time. The results revealed that the microgel particles had excellent swelling ratio of 68.95 g g−1 (w/w), which was 8.4 times that of counterpart clinically used microporous polysaccharide hemospheres, Arista. And poly(DEX-GMA/AAc) showed very short gelation time of 10–13 s. As a result, a gelled film could be formed rapidly after poly(DEX-GMA/AAc) absorbed water in blood when used on wounds, and then staunched bleeding. Poly(DEX-GMA/AAc) microgel particles showed better clotting ability than commercial hemostatic agent Flashclot in vitro. In addition, poly(DEX-GMA/AAc) did not cause exothermic burn when absorbing liquid, which was superior to Flashclot. No obvious toxicity was found in cytotoxicity study and skin irritancy test. Blood loss and hemostasis time were dramatically reduced by poly(DEX-GMA/AAc) microgel particles in hemorrhage models of ear vein, ear artery, liver and femoral artery in rabbits. These results indicated that the poly(DEX-GMA/AAc) microgel particles are a potential hemostatic agent with almost no cytotoxicity and good biocompatibility.
研究领域:
医学材料学
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
DENTAL MATERIALS
·
2021
·
IF 5.304
Yinan Sun,Zeying Zhou,Hao Jiang,Yuting Duan,Jialin Li,Xiaoqiu Liu,Lihua Hong,Chengji Zhao
Objective Although bisphenol Aglycidyl methacrylate (Bis-GMA) are widely used in the dental composite , its raw materials include the petroleum-based product bisphenol A (BPA) with high estrogenic activity (EA). In this study, two new BPA-free dimethacrylate monomers from bio-based material creosol were synthesized and evaluated. Methods The renewable bisphenol monomer 5, 5'-methylenedicreosol (BCF) was prepared from bio-based material creosol. By the human breast cancer cells (MCF-7 cells) proliferation assay, a risk assessment of BCF was performed to determine if BCF possessed reduced EA in comparison to BPA. Then, the novel monomers 5, 5'-methylenedicreosol diglycidyl ether diacrylate (BCF-EA) and 5, 5'-methylenedicreosol diglycidyl ether dimethacrylate (BCF-GMA) were synthesized from BCF with epichlorohydrin and (meth)acrylate. All products were investigated by 1 H NMR and FT-IR spectra. The control resin was a mixture based on Bis-GMA and tri(ethyleneglycol) dimethacrylate (TEGDMA) with a weight ratio of 5:5 (5B5T). Similarly, experimental resin matrix was a mixture based on BCF-EA/TEGDMA (5E5T) and BCF-GMA/TEGDMA (5G5T). And their corresponding composites were then prepared with corresponding resin matrices and hybrid SiO 2 (5E5TC, 5G5TC and 5B5TC). The properties of these composites were investigated according to the standard or referenced methods. Each sample was evaluated for double bond conversion (DC), shrinkage stress (SS) and volumetric polymerization shrinkage (VS). Water sorption (WS), water solubility (SL), mechanical properties and cytotoxicity were also measured. Results 1 H NMR and FT-IR spectra confirmed the chemical structure of each monomer. EA test revealed that bio-based bisphenol monomer BCF as the precursor of BCF-EA and BCF-GMA showed lower EA than BPA. Cured resin matrix: Both 5E5T and 5G5T had nearly the same DC (p < 0.05), which was higher than 5B5T (p < 0.05); 5E5T and 5G5T had lower VS, SL and cytotoxicity than 5B5T (p < 0.05); mechanical properties of 5E5T and 5G5T were all better than those of 5B5T (p < 0.05). Cured composite: There was no significant difference in conversion (p < 0.05); 5E5TC and 5G5TC had significantly lower VS (p < 0.05); WS of 5E5TC and 5G5TC were similar (p < 0.05), but higher compared to 5B5TC (p < 0.05); 5E5TC and 5G5TC had the deeper depth of cure (p > 0.05); before water immersion, there was no significant difference in flexural strength between 5E5TC and 5G5TC (p > 0.05), and higher than 5B5TC (p < 0.05); 5E5TC and 5G5TC showed less cytotoxicity than 5B5TC (p < 0.05). Significance The new BPA-free di(meth)acrylates are promising photocurable dental monomers owning to bio-based raw material, high degree of conversion coupled with low curing shrinkage and good mechanical properties. Therefore, BCF-EA and BCF-GMA has a potential to be used as the substitution for Bis-GMA to prepare Bis-GMA-free dental composite.
研究领域:
材料科学
·
口腔医学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2018
·Vol. 25
·期 7
·1-11
·
IF 1.434
Gao Baojiao,Zhang Dandan,Li Yanbin
A special redox surface-initiating system, tertiary aromatic aniline/BPO (benzoyl peroxide, BPO), was constituted at the interface between polysulfone (PSF) microfiltration membrane and an organic solution, in which the monomer glycidyl methacrylate (GMA) and BPO were dissolved, and the graft-polymerization of GMA on the porous membrane of PSF was smoothly carried out by the initiating of the surface initiating system, getting the grafted membrane PSF- g -PGMA, which is a precursor of many functional composite membranes. The microfiltration membrane of chloromethylated polysulfone (CMPSF) was first prepared by the method of immersion-precipitation phase transformation; subsequently the CMPSF membrane was modified with 3-hydroxy-N,N-diethylaniline (HDEA) as reagent, and through the nucleophilic substitution reaction between the chloromethyl group on CMPSF membrane and the hydroxyl group of HDEA, tertiary aromatic aniline group DEA was bonded on the PSF microfiltration membrane, obtaining the modified membrane PSF-DEA; finally, the graft-polymerization of GMA was successfully realizing by the surface-initiating system of DEA/BPO, getting the grafted porous membrane PSF- g -PGMA. The grafted membrane was characterization by FTIR and SEM. The experimental results show that the reaction between the chloromethyl group on CMPSF membrane and HDEA in the solution belongs to unimolecular nucleophilic substitutions. For the graft-polymerization of GMA, the appropriate temperature is 70 °C, the suitable mass percent concentration of GMA in solution is 5%, and the optimal concentration of BPO is 1.5% of monomer GMA mass. For the grafted membrane PSF- g -PGMA prepared under the optimal reaction conditions, the grafting degree of PGMA can reach 0.86 g/cm 2 .
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xiao-han Pan,Jian-hua Zu,Yi Xue,Si-yu Liu,Jing-jie Diao,Long Zhao
110m Ag nanoparticles ( 110m Ag Nps) is a radioactive contaminant in the process wastewater of nuclear power plants. In this study, the novel material containing amines PP-g-GMA@EDA as the adsorbent is proposed for the removal Ag Nps. PP-g-GMA@EDA is synthesized by γ ray-induced simultaneous irradiation grafting and its removal performances for Ag Nps from aqueous solutions has been studied. In Ag Nps solution at different pH values, PP-g-GMA@EDA possesses better removal efficiency than the commercial resin IRN9766 commonly used in nuclear power plants, especially at pH 4. XPS helps confirm that the adsorption mechanism is mainly ion exchange to negatively-charged Ag Nps by protonated secondary amines on the adsorbent. At the optimal pH 4, the effects of different parameters such as the initial Ag Nps concentration, the ratio of adsorbent dosage to solution volume and the adsorption time on adsorption performances are considered. 100% adsorption efficiency of Ag Nps can be achieved and the maximum adsorption capacity is 101.44 mg/g. The Langmiur isotherm model and the pseudo-first-order kinetic model better describe the adsoption process. In the simulated nuclear power plant process wastewater, even though the concentration of competitive ions is 40 times that of Ag Nps, the removal efficiencies still maintain above 85%. In addition, 5 wt% ammonia water can effectively desorb Ag Nps from the used adsorbent to ensure the recyclability of PP-g-GMA@EDA. The well designed adsorbent with excellent removal efficiency and selectivity provides a very efficient, sustainable, and industrially feasible way for Ag Nps decontamination from nuclear wastewater.
研究领域:
环境科学
·
放射化学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE
·
2024
·
IF 3.9
Mingjiao Li,Xinyi Chen,Qiyang Feng,Wanyi Fan,Yitong Ding,Ze Kan,Zhibo Li
Synthetic poly(4-hydroxybutyrate) (P4HB), a flexible and biodegradable polymer, shows great promise in improving the toughness of poly(lactic acid) (PLA), but the inherent immiscibility of PLA and P4HB compromises the toughening efficiency. To address this issue, P4HB grafted glycidyl methacrylate (P4HB-g-GMA) is synthesized for the purpose of enhancing the compatibility within the PLA/P4HB blend. The epoxy groups on P4HB-g-GMA can form strong chemical bonds with PLA chains and remain compatible with P4HB. Rheological data confirm that adding P4HB-g-GMA enhances polymer chain entanglement. Therefore, the phase interface of the blend becomes more diffuse, leading to improved mechanical performance. Specifically, a 3D-printed PLA/P4HB/P4HB-g-GMA blend containing 8% P4HB-g-GMA (PLA/P4HB/G8) achieves an elongation at break of 161.5%, approximately 22.7 times higher than that of a PLA/P4HB blend without the modifier. Moreover, the PLA/P4HB/G8 blends show a higher volume expansion ratio (VER) and better cell morphology due to the increased melt strength from P4HB-g-GMA. This study demonstrates a simple and efficient method to improve the compatibility between PLA and P4HB, resulting in superior mechanical performance of PLA/P4HB blends and broadening their potential applications in foaming. Graphical
研究领域:
材料科学
·
高分子工程
·
生物降解聚合物
·
泡沫技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2020
·
IF 2.87
Jiaxue Yang,Mengyuan Liao,Gaoying Hong,Shiqi Dai,Jiadi Shen,Haifeng Xie,Chen Chen
To investigate the effects of 3-aminopropyltriethoxysilane (APTES)- or (3-mercaptopropyl)trimethoxysilane (MPTS)-conditioned nanozirconia fillers on the mechanical properties of Bis-GMA-based resin composites. The conditioned fillers were characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and thermodynamic calculations. They were then used to prepare Bis-GMA-based resin composites, whose flexural strength and elastic modulus were evaluated. The Cell Counting Kit-8 (CCK-8) assessed the composites’ cytotoxicity. The FTIR spectra of the conditioned fillers showed new absorption bands at 1569 and 1100 cm–1, indicating successful grafting of APTES or MPTS onto nanozirconia. XPS confirmed the Zr–O–Si bonds in the APTES- or MPTS-conditioned fillers at contents of 2.02 and 6.98%, respectively. Thermodynamic calculations reaffirmed the chemical binding between the two silanes and nanozirconia fillers. Composites containing the conditioned nanozirconia fillers had significantly greater flexural strengths (APTES, 121.02 ± 8.31 MPa; MPTS, 132.80 ± 15.80 MPa; control, 94.84 ± 9.28 MPa) and elastic moduli (8.76 ± 0.52, 9.24 ± 0.60, and 7.44 ± 0.83 GPa, respectively) than a control with untreated fillers. The cytotoxicity assay identified no significant cytotoxicity by composites containing the conditioned fillers. Silanes were previously considered to be unable to chemically condition zirconia to bond with resin. Inclusion of APTES- or MPTS-conditioned nanozirconia fillers can improve the mechanical properties of Bis-GMA-based resin composites without obvious cytotoxicity in this study.
研究领域:
材料科学
·
牙科材料
·
高分子科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2023
·Vol. 63
·期 7
·2084-2092
·
IF 3.2
Gaoyuan Ye,Tongfei Gu,Boyuan Chen,Hongjie Bi,Yingcheng Hu
To improve the toughness of polylactic acid (PLA), in this research, a tough polymer polycaprolactone (PCL) was combined with PLA to prepare blends, and a compatibilizer of glycidyl methacrylate grafted PLA (PLA-g-GMA) was produced to enhance the compatibility of PLA/PCL blend. Compared with PLA/PCL blend, the compatibilized blend exhibited a lower melting temperature and greater thermal stability. The tensile test indicates that the addition of compatibilizer greatly improved the toughness of the PLA/PCL blend. Particularly, the elongation at break of PLA/PCL blend with 6 wt% PLA-g-GMA increased to 370% and reached about 66 times of neat PLA. In addition, compatibilized blends have good shape memory performance. The research provides a simple and feasible method to overcome the brittleness of PLA, supplying a new strategy to modify PLA.
研究领域:
材料科学
·
高分子科学
·
工程学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Wendi Huo,Jincheng Li,Yupeng Wen,Xinyuan Zhang,Huan Liu,Yingchun Mu,Chunhui Zhao,Chaoying Zhang,Rongyue Zhang
In this study, we present a simple and rapid boronate affinity extraction methodology for the HPLC-MS/MS analysis of four nitrofuran metabolites (NFMs) including SEM, AOZ, AHD and AMOZ in fish samples. To enhance the efficacy of this approach, mesoporous poly(GMA-EGDMA) microspheres, abundant in cis-diols, were synthesized for boronate affinity extraction. Meanwhile, 4-fluoro-3-formylphenyl boronic acid was utilized for the derivatization of NFMs, facilitating the immobilization of boronate ligands onto their molecular structures. Compared to the Chinese national food safety standard GB 31656.13–2021, the boronate affinity extraction eliminates the need for extraction solvents and centrifugation, streamlines the pretreatment process, and maintains a mild extraction environment. Furthermore, the poly(GMA-EGDMA) microspheres exhibited excellent reusability, retaining their performance over six adsorption-desorption cycles. The NFMs demonstrated excellent linearity (R² > 0.999) across the range of 0.5 to 50 µg kg⁻¹ . The quantitative limit was established at 0.5 µg kg⁻¹ . The recoveries of spiked tilapia samples ranged from 94.2 % to 110.7 %, while intra-day and inter-day RSDs were below 5.9 %. This method emerges as an economical, straightforward, rapid, and sensitive alternative for monitoring of NFM residues in aquatic products.
研究领域:
食品科学
·
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2022
·Vol. 29
·期 11
·1-9
·
IF 3.061
Chen Qianwen,Li Jia,Dong Ganggang,Zhu Zongting,Zhang Qiuyu,Yin Dezhong
Controlled free radical polymerization in confined spaces has great potential for obtaining new materials with specific properties and predetermined structures. In this work, polymerized high internal phase emulsion (PolyHIPE) monoliths with bicontinuous structure were synthesized and used as confined reactors for reverse atom transfer radical polymerization (RATRP) of glycidyl methacrylate (GMA). Compared to PGMAs by conventional polymerization, the PGMA obtained in the PolyHIPE exhibits a larger molecular weight, higher glass transition temperature (Tg) and a higher isotactic configuration. The proportion of isotactic configuration in the PGMAs polymerized in the PolyHIPE increased notably, with the highest reaching 65%. All the results exerted evidence for the confining effect of PolyHIPE to the RATRP of GMA. In particular, the PolyHIPE with the largest surface area showed the most significant confining effect. The PGMA obtained within it exhibited the largest molecular weight, the highest isotactic configuration ratio, and the highest Tg.
研究领域:
材料科学
·
化学工程
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）