JOURNAL OF APPLIED POLYMER SCIENCE
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2025
·
IF 2.8
Haoping Peng,Dingding Li,Shouwu Xu,Yonggang Zhao,Yun Lei,Haoran Zhu,Qigui Tan,Zhiwei Li
In this study, sodium tripolyphosphate was used to modify starch, resulting in a novel starch-based flame retardant. The phenolic resin was employed as the matrix, with the starch-based flame retardant incorporated as a filler and applied to the surface of rigid polyurethane foam (RPUF) to prepare the composite material. Scanning electron microscopy revealed that the coating effectively penetrated the RPUF framework, forming a strong and tightly bonded layer with excellent coverage. The combustion and mechanical properties of the composite material were investigated. The results showed that, in vertical combustion tests, the composite material met the UL940-5VA standard. In thermogravimetric analysis, the composite exhibited a 42.71% increase in char residue compared with the RPUF. In three-point bending pulverization resistance tests, the composite demonstrated a 28.42% reduction in chalking compared with the RPUF coated solely with phenolic resin. This study paves a new path for the practical application of bio-based flame retardants.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 26
·e55580
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IF 2.7
Zhenfeng Ma,Zhaoguang Zheng,Jun Zeng,Guodong Feng,Yihua Huang,Wenhui Luo,Minyou He,Jiaming Cui,Yi-Jun Liang
The practical application of fiber membranes prepared by electrostatic spinning requires a uniform thickness. However, the parameters involved in the spinning process are highly complex, particularly when it comes to precise control over membrane thickness. Hence, achieving a consistent and homogeneous thickness for fiber membranes has posed significant challenges thus far. To accurately predict membrane thickness during the spinning process and ensure consistent outcomes, this study employed polyvinylidene fluoride as the raw material and optimized electrostatic spinning preparation using an innovative airflow-assisted strategy. The as-proposed preparation strategy effectively enhances the volatilization of solvents within the jet, also promotes jet stretching through assistance from airflow, resulting in a more stable and homogeneous fiber diameter. Additionally, COMSOL simulations were utilized to provide rational explanations for these findings. By collecting multiple process parameters, including positive voltage, liquid supply speed, winding speed, and solution concentration, this study has successfully developed an artificial neural network (ANN) that exhibits reliable predictive capabilities for membrane thickness. Notably, the model demonstrates a remarkable goodness-of-fit with an R 2 value of 0.9981. Through the integration of ANN with electrostatic spinning technology, significant advancements have been achieved in accurately predicting and controlling the uniformity of electrostatically spun polymer fiber membranes.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2011
·Vol. 124
·期 6
·4678-4685
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IF 1.24
Ying Chen,Yongbing Chen,Jingya Nan,Chunpeng Wang,Fuxiang Chu
A convenient approach has been developed for the preparation of microsize hydrogels composed of crosslinked poly(acrylic acid) (PAA) and poly( N -isopropylacrylamide) (PNIPAm). First, semi-interpenetration polymer networks of hydropropylcellulose (HPC) and PNIPAm- co -PAA copolymer are formed through the copolymerization and crosslinking of monomer acrylic acid and N -isopropylacrylamide in HPC aqueous solution. After the selective removal of HPC from networks due to ionization of PAA units and disruption of hydrogen bonding with increasing pH, PNIPAm- co -PAA microgels are obtained, whose volume is confirmed to be responsive to both temperature and pH. Doxorubicin hydrochloride (Dox) can be encapsulated in PNIPAm- co -PAA microgels with high drug loading driven by the electrostatic interaction, and a sustained-release characteristic of Dox from the microgels is observed under physiological pH value and temperature. In vitro cell experiments, the drug-loaded microgels can be taken up by LoVo cells and release their payload in cell cytoplasm without loss of drug efficacy. This indicates that PNIPAm- co -PAA microgels might be a potential drug delivery carriers especially for water-soluble or polypeptide drugs. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2011
·Vol. 123
·期 3
·1486-1493
·
IF 1.24
Yubing Xiong,Yujiao Wang,Hong Wang,Rongmin Wang,Zipeng Cui
Highly cross-linked polymeric nanoparticles were prepared via novel one-step synthesis by copolymerizing ethylene glycol dimethacrylate (EGDMA) and the ionic liquid, 1-vinyl-3-(2-methoxy-2-oxyl ethyl) imidazolium chloride ([VMIm]Cl). The results indicated that nanoparticles with the average size of about 350 nm could be obtained conveniently through the cross-linking copolymerization. The nanoparticles were characterized using scanning electron microscopy, atomic force microscopy, Fourier transform Infrared, thermo gravimetric analysis, element analysis, and X-ray diffraction techniques. Moreover, the cross-linked polymeric nanoparticles were highly active and selective catalysts for the cycloaddition reaction of carbon dioxide to epoxides. The influences of reaction time, reaction temperature, CO 2 pressure, and amount of catalyst on yield of the products were investigated. The results revealed that cyclic carbonates with high yield (98.4%) and selectivity (100%) could be produced on the condition of 0.1 g catalyst, 5 MPa CO 2 , 160°C and 12 h. In addition, the nanocatalysts could be easily recovered by filtration, and reused several times with only slight loss of catalytic activity. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2011
·Vol. 121
·期 2
·1166-1175
·
IF 1.24
Shufang Liu,Yiwang Chen,Xiaohui He,Lie Chen,Weihua Zhou
The graft copolymer poly(butoxymethylene norbornene- co -norbornenemethylene bromoisobutyrylate) [P(BN/NB)]- graft -poly(hydroxyethyl methacrylate) (PHEMA) was synthesized by the atom transfer radical polymerization of 2-hydroxyethyl methacrylate from a copolymer prepared by two functional norbornene monomers via a vinyl addition mechanism. The graft copolymer P(BN/NB)- g -PHEMA was further crosslinked with 4,5-imidazole dicarboxylic acid (IDA) and then doped with phosphoric acid (H 3 PO 4 ) to form imidazole–H 3 PO 4 complexes. The results show that the polynorbornene backbone and crosslinked micromorphology produced low methanol permeability in the membranes (from 1.5 × 10 −7 to 3.8 × 10 −6 cm 2 /s) and endowed the membranes with good mechanical properties (with elastic modulus values of 692.7 to 159.7 MPa, elongation at break values from 2.7 to 22.7%, and tensile strength at break values from 14.4 to 5.5 MPa) and excellent thermal stability (up to 280°C). Furthermore, the proton conductivities of the membranes increased with increasing temperature and increasing content of IDA/H 3 PO 4 in the membranes. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2010
·Vol. 119
·期 2
·1204-1210
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IF 1.203
Shaoping Yang,Shiyu Fu,Hao Liu,Yiming Zhou,Xueyun Li
Environment-friendly carboxymethyl cellulose (CMC) hydrogel beads were successfully prepared using epichlorohydrin (ECH) as a crosslinking agent in the suspension of fluid wax. There was an ether linkage formed between ECH and CMC, which was identified from bands in FTIR spectra of the prepared hydrogel. The prepared hydrogel beads with diameters about 4 mm were apparently spherical and fully transparent. The X-ray diffraction (XRD) spectra indicated that the adsorption of metal ion onto the oxygen atom of carboxyl group led to change in crystallinity patterns of hydrogels. The scanning electron microscope (SEM) images clearly showed that the hydrogels had an internal porous structure. The adsorption capacity increased as initial concentrations of metal ions and the pH value of metal ion solution increased. Freundlich and Langmuir isotherm models were employed to analyze the data from batch adsorption experiments. There are vey good correlation coefficients of linearized equations for Langmuir model, which indicated that the sorption isotherm of the hydrogel beads for metal ions can be fitted to the Langmuir model. The maximum adsorption amount of hydrogel beads for metal ions is 6.49, 4.06, and 5.15 mmol/g for Cu(II), Ni(II), and Pb(II), respectively. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2009
·Vol. 113
·期 2
·1330-1334
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IF 1.187
Chaohui Zhang,Xiaogang Zhao,Danming Chao,Xiaofeng Lu,Chunhai Chen,Ce Wang,Wanjin Zhang
A nonliquid crystal polymer was prepared by introducing the azobenzene group into the main chain of the poly(amic acid). The polymer film can be easily prepared by a general method. The obtained film exhibits a high bending intensity and shows fast bending response and a very large bending angle (reach of 90°) at room temperature without temperature heating, which can improve the efficiency of the transformation of energy from light to mechanical energy. The surface structure of the relief grating also was investigated by atomic force microscopy. The depth of typical surface relief was approximately 65 nm. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Chufan Jing,Zhenxue Pan,Xinyue Gou,Lin Xia,Yongming Li,Caihong Xu
The poor compatibility of liquid polycarbosilane with commercial photosensitive resins limits its application in 3D printing. To meet the practical requirement, the synthesis of photosensitive polycarbosilane capable of rapid photopolymerization has emerged as a new focus of research. In this work, a polycarbosilane with 2–10 mol% acrylate group from HEA was synthesized via a dehydrogenation coupling reaction between the Si–H of vinyl-containing polycarbosilane and the –OH of 2-hydroxyethyl acrylate, yielding over 90%. The acrylate-grafted polycarbosilane shows low viscosity, high ceramic yield, and good storage stability, and its photocuring rate increases with the content of grafted-acrylate. The 10 mol% acrylate-grafted polycarbosilane named VA10 with a 1% photoinitiator can be rapidly photocured under 405 nm LED light and produce a cured green body with enough mechanical properties, suggesting its high potential for accurate 3D printing. Upon pyrolysis at 1000°C, the precursor green body printed using the digital light processing (DLP) technique produced a honeycomb ceramic component with a ceramic yield of 77.6% and a density of 0.42 g/cm 3 , which exhibited a specific compressive strength of 68.7 ± 4.9 MPa/(g·cm 3 ).
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2011
·Vol. 124
·期 1
·109-115
·
IF 1.24
Jikui Wang,Guofeng Cai,Xudong Zhu,Xiaping Zhou
The oxidative chemical polymerization of 3, 4-ethylenedioxythiophene (EDOT) was conducted at room temperature in the presence of poly(styrene sulfonate) (PSS) as the doping agent, sodium supersulphate (Na 2 S 2 O 8 ) and ferric sulphate(Fe 2 (SO 4 ) 3 ) as the compound oxidant and deionized water as the solvent. In order to remove sodium ion (Na + ), ferric ion (Fe 3+ ), and sulfate ion (SO4 2− ), certain amount of ion exchanger was added after 24 h, the dark blue poly(3, 4-ethylenedioxythiophene) (PEDT)/PSS solution was obtained. The influence of different proportions of EDOT and PSS, different proportions of EDOT and the compound oxidant, different stirring rates on the morphology, and surface resistivity were discussed. The influence of pH value of the PEDT/PSS solution, the coating thickness, and soak time on the surface resistivity was investigated. Recipe and experimental conditions were optimized and the PEDT/PSS solution was obtained with excellent performance which has relatively low in surface resistance, good water tolerance, and light transmittance. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Ao Ji,Xingqi Luo,Xinguo Yang
Multiple factors stimulate human beings in their daily lives, but uniformly collecting these signals is challenging. This study proposes a physically cross-linked method that employs hydrogen bonding interactions to prepare poly(vinyl alcohol)/perylene imide (PVA/PI) hydrogels. The prepared PVA/PI hydrogels demonstrate favorable compressive strength (45–75 kPa) and adhesion properties. At room temperature, elongation reaches approximately 400%. Additionally, the PVA/PI hydrogels exhibit strong mechanical properties, with a maximum elongation of 200%, and high ionic-electronic conductivity of 29.6 S m −1 , even after being soaked in a 2 M HCl solution for 24 h. The water-soluble PI in the PVA/PI hydrogels is environmentally responsive, resulting in a current response time of 100 ms under 365 nm irradiation, as well as reversible fluorescence changes across different pH levels. Both the PVA5/PI1 and PVA5/PI1/HCl2 (the concentrations were 5 wt%, 1 mg mL −1 and 2 mol L −1 , respectively) hydrogels demonstrate high sensitivity (0.49 and 7.88 kPa −1 ) and a wide pressure monitoring range (0.088–30.67 kPa and 0.088–18.67 kPa, respectively) as pressure sensors. The first developed recyclable PVA/PI hydrogel shows promise for use in wearable sensing devices and is expected to be applied in complex environments.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Kaifeng Gu,Jianyu Wang,Chuanjie Fang,Liping Zhu
Nanofiltration (NF) membranes play a huge role in industrial manufacturing with their unique selective permeability. Membrane material and structure are the main factors affecting the effectiveness of NF separation. Typically, NF membranes are produced by interfacial polymerization (IP). Therefore, control of the IP process is particularly important. This work provides a NF membrane preparation process by combining internal modulation of the separation layer and surface modification. The diffusion of polyethyleneimine (PEI) molecules is accelerated by the introduction of ethanol and cetyltrimethylammonium bromide into the PEI aqueous phase solution, resulting in the formation of a loose interior. In addition, the high selectivity is maintained by high molecular weight PEI modifying. After optimizing the process, the NF membrane permeate flux and selectivity can be increased compared to the blank group (MgCl 2 desalination from 90% to 97%, permeate flux from 17 to 35 L m −2 h −1 ). The resulting PEI/TMC NF membranes also show excellent separation properties in mixed salt applications for magnesium-lithium separation.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 45
·e56215
·
IF 2.7
Xinxin Xu,Shangchao Ji,Lei Shi,Hailong Chen,Dong Liu,Jiawen Dai,Xianze Yin,Baoqing Shentu,Long Zheng
Developing nonchemical cross-linked natural rubber (NR) latex gloves with antibacterial properties and simultaneously enhanced mechanical strength and elongation at break is challenging. In this study, liquid-like silica (SiO 2 ) nanofluids (SiO 2 nfs) with hard SiO 2 cores and soft organic molecule shells are synthesized and then self-assembled with graphene oxide (GO) via electrostatic interactions to create GO@SiO 2 nfs hybrids, which are blended with NR latex. Strong hydrogen bonding and electrostatic interactions between NR latex particles and GO@SiO 2 nfs hybrids form physically cross-linked GO@SiO 2 nfs/NR composite films. The rigid GO in the hybrids provided reinforcement, while the vicious SiO 2 nfs facilitated the energy dissipation during stretching. This synergy results in simultaneous improvements in the mechanical strength and elongation at break of the GO@SiO 2 nfs/NR composite films. Their tensile strength increased by 95.2% compared with pure NR films and by 20.6% compared with GO/NR composite films, and the elongation at break improved by 27.8% and 19.4%, respectively. Furthermore, the presence of quaternary ammonium cation in SiO 2 nfs conferred excellent antibacterial efficacy against Escherichia coli and Staphylococcus aureus to the GO@SiO 2 nfs/NR composite films. These results offer valuable insights for the development of high-performance, nonchemical cross-linked NR latex products.
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高影响因子
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