JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 134
·期 46
·45431
·
IF 1.86
Ya Liu,Peng Qian,Yang Yu,Li Xiao,Yongliang Wang,Shufeng Ye,Yunfa Chen
Heavy metal ions such as Cu 2+ and Pb 2+ impose a significant risk to the environment and human health due to their high toxicity and non-degradable characteristics. Herein, Al(OH) 3 -polyacrylamide chemically modified with dithiocarbamates (Al-PAM-DTCs) was synthesized using formaldehyde, diethylenetriamine, carbon disulfide, and sodium hydroxide for rapid and efficient removal of Cu 2+ and Pb 2+ . The synthesized adsorbent was characterized by Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis, scanning electron microscopy–energy dispersive X-ray spectroscopy analysis, and transmission electron microscope measurements. Al-PAM-DTCs showed rapid removal of Cu 2+ (<30 min) and Pb 2+ (<15 min) with high adsorption capacities of 416.959 mg/g and 892.505 mg/g for Cu 2+ and Pb 2+ respectively. Al-PAM-DTCs also had high capacities in removing suspended solids and metal ions simultaneously in turbid bauxite suspensions. FTIR, thermodynamic study, and elemental mapping were used to determine the adsorption mechanism. The rapid, convenient, and effective adsorption of Cu 2+ and Pb 2+ indicated that Al-PAM-DTCs has great potential for practical applications in purification of other heavy metal ions from aquatic systems. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45431.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 134
·期 47
·45544
·
IF 1.86
Chengzhen Geng,Qian Zhang,Weihua Lei,Fengmei Yu,Ai Lu
Silica is the most widely-used filler to reinforce liquid silicone rubber (LSR), but the high viscosity of LSR/silica suspension significantly limits its processing flexibility. To balance the processibility and reinforcing efficiency of LSR/silica systems, two kinds of enols (propenol and 1-undecylenyl alcohol) and a saturated alcohol (1-undecylic alcohol) were employed to modify the silica surface. Various rheological tests were carried out to investigate the processibility as well as filler networking and crosslinking processes of the modified systems. Tensile tests were also adopted to verify the reinforcing effect. It was found that surface modification of silica by 1-undecylenyl alcohol could significantly reduce the viscosity of its suspension with LSR. Meanwhile, the mechanical strength of LSR could be largely enhanced by six times with 10 wt % modified silica. This work will merit design and production of LSR materials with balanced processibility and mechanical performance. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45544.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 134
·期 33
·45070
·
IF 1.86
X. Y. Li,X. X. Wang,X. Y. Jiang,F. Xu,H. Y. Liu,L. G. Bai,H. Y. Yan,X. Q. Qiao
A multiwalled carbon nanotube (MWCNT) composite monolithic column was prepared by the redox initiation method, and MWCNTs were embedded into the monolithic material. In this experiment, 1-octene was used as monomer, triethylene glycol dimethacrylate was used as the crosslinking agent, propanol and 1-dodecanol were used as porogens, hydroxyl-functionalized MWCNTs were used as the inorganic material, and dibenzoyl peroxide and N,N -dimethyl aniline were used as initiators. The MWCNT composite monolithic column was characterized by scanning electron microscopy, mercury intrusion porosimetry, and nitrogen adsorption–desorption isotherm measurements. The MWCNT composite monolith showed a uniform structure and a high permeability. The MWCNT composite monolithic column uses the high-performance liquid chromatography to analyze the sample. Compared with the monolithic column without MWCNTs, the MWCNT composite monolith not only improved the column efficiency but also shortened the separation time. Six small molecules were successfully separated by the MWCNT composite monolith in 3 min, with the highest column efficiency reaching 36,000 plates/m In addition, the monolith was also used to separate complex protein samples, including snailase, plasma, and egg white. Therefore, the monolithic column was suitable both for the separation of macromolecules and small molecules. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45070.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 135
·期 10
·45940
·
IF 1.86
Mei Wang,Jianchun Jiang,Jianling Xia,Shouhai Li,Mei Li
Phosphate ester groups containing ricinoleic acid-based Ca/Zn (LPPRA-Ca and LPPRA-Zn) stabilizer was successfully synthesized from ricinoleic acid (RA) and used as thermal stabilizers for poly(vinyl chloride) (PVC). These thermal stabilizers were characterized by Fourier transform infrared spectrometry, 1 H nuclear magnetic resonance, and inductively-coupled plasma atomic emission spectroscopy. The effects of LPPRA-Ca/LPPRA-Zn, CaSt 2 /ZnSt 2 , and other stabilizers on the thermal stability of PVC were studied through Congo Red test, discoloration tests, thermogravimetric analysis (TGA), TGA–infrared, and TGA–mass spectrometry. The thermal stability tests show that LPPRA-Ca/LPPRA-Zn displays the best initial color stability and long-term thermal stability for PVC. The superior performance is attributed to the synergistic effect of LPPRA-Ca and LPPRA-Zn. Moreover, a lower Zinc content of LPPRA-Zn in PVC helps to decrease the “zipper dehydrochlorination” of the product, which contributes to a better initial thermal stability. Except for the better stabilization performance, LPPRA-Ca/LPPRA-Zn also displays better plasticization performance for PVC compared with other stabilizers. A possible stabilizing mechanism of PVC/LPPRA-Ca/LPPRA-Zn system was presented. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 45940.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 134
·期 35
·45251
·
IF 1.86
Shan Wu,Lei Wang,Lixin Wu,Zixiang Weng,Yu Zhou
Although organically modified montmorillonite (OMMT) has been incorporated into unsaturated polyester (UP) resin to enhance properties, the aggregation often leads to defects which directly affect the properties of nanocomposites. In this work, OMMT slurry modified by a new allyl surfactant with carbon–carbon double bond, hexadecyl allyl dimethyl ammonium chloride (C 16 -DMAAC), was employed to prepare nanocomposites by in situ polymerization. The results illustrated that the existence of OMMT slurry helped monomers enter the OMMT galleries, leading to well-dispersed OMMT in the UP matrix. The mechanical properties and thermal properties of OMMT nanocomposites were improved. With OMMT loading of 5 wt %, the tensile strength and flexural strength can be improved by 22% and 38%, respectively. Meanwhile, the onset thermal decomposition temperature ( T –10 ) value was ameliorated from 310.6 °C to 330.6 °C. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45251.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 134
·期 34
·45229
·
IF 1.86
Chunyang Shang,Yanjun Chen,Chaocan Zhang,Zongyi Deng,Zhihui Wu
This article describes a new and simple method to control the release of payloads encapsulated in chitosan capsules. The capsules with the liquid core and rigid shell are performed by drop-wisely adding chitosan solution into anionic surfactant solution. The capsules can be destroyed by β-CD because β-CD binds and sequesters surfactant from the shell through the host-guest interaction. The destruction process is studied by optical microscopy and scanning electron microscopy. The capsules can swell in acid solution and shrink in alkaline solution. It is found that the destruction speed increases with increasing acidity or alkalinity of β-CD solution. Rhodamine B encapsulated in the liquid-core of chitosan capsules can be released from the capsules in β-CD solution. The release rate can be adjusted by the pH value of β-CD solution. The release speed of the capsule increases with the increase of acidity or alkalinity in β-CD solution. The above concept can provide more versatility for controlled release of a variety of payloads such as drugs, cosmetics, and so on. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45229.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 134
·期 21
·
IF 1.86
Xiaoya Jiang,Xiaoyan Jiao,Doudou Zhang,Ligai Bai,Haiyan Liu,Hongyuan Yan
A polymer monolithic column was prepared via redox system in a stainless steel column (50 × 4.6 mm i.d.) by using 1,6-hexanediol diacrylate as monomer and ethylene dimethacrylate as cross linking agent. Characteristics of the homemade monolithic column were investigated by scanning electron microscopy, nitrogen adsorption-desorption and mercury intrusion porosimeter, respectively. The results showed that the resulting monolithic column occupied relative uniform porous skeleton structure. Furthermore, the monolith was tested by separating aromatic compounds in conjunction of high performance liquid chromatography with the highest column efficiency of more than 21,000 plate per meter, which was relative high for polymer-based monolithic column with 4.6 mm i.d. At last, the monolithic column was used to simultaneously separate and quantitatively analyzes five active compounds in Chinese herb Rheum palmatum L. The validation of the method was carried out, which indicated that the accuracy represented by recovery was in the range of 98.48% to 101.57%. Limit of detection and limit of quantification for the five active compounds were less than 33.7 ng and 90.8 ng, respectively. All the results indicated that the present method was simple and efficient for quantitative analysis of the five active compounds from Chinese herb Rheum palmatum L. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44874.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Yumei Luo,Kefu Pu,Jie Gao,Yun Zhou,Jinyu Wan,Xiaodong Bai
Two kinds of porous polymer were prepared based on high functionality components. Thermogravimetric analysis (TGA) is used to compare the thermal degradation behavior and kinetics of these two materials. The thermogravimetric tests of rigid polyurethane foam (H-RPUF) and polyurea aerogel (H-PUA) were carried out in nitrogen atmosphere at different heating rates. The thermal degradation characteristics of the porous polymer were obtained. The apparent activation energy ( E a ) of thermal degradation of the porous polymer was investigated by model-free methods. The results showed that the thermal degradation temperature and ash content of H-RPUF were higher than those of H-PUA, and the volatile content was lower. With the rise of heating rate, thermal hysteresis effect of the two porous polymer was relatively high, while the release amount of volatiles was unchanged. For the Kissinger method, E a of H-PUA and H-RPUF was 212.8 kJ mol −1 and 157.4 kJ mol −1 , respectively. According to Starink method, the average activation energy of H-PUA and H-RPUF was 220.2 kJ mol −1 and 107.2 kJ mol −1 , respectively. Obtained by Flynn-Wall-Ozawa model, the average activation energy of H-PUA and H-RPUF was 219.0 kJ mol −1 and 111.5 kJ mol −1 , respectively. The data obtained from the three models all show that E a of thermal degradation of H-PUA is higher than that of H-RPUF, and it is less likely to decompose.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 37
·e55941
·
IF 2.7
Zhitao Yang,Zhen Zhang,Cheng Li,Yiping Fang,Yong Liu,Qingfeng Yi
Since the advent of all-solid-state lithium-ion batteries (ASSLIBs), they have been widely regarded as the ideal high-temperature-resistant energy storage devices. The solid-state electrolyte, a crucial component, should possess high ionic conductivity, excellent flexibility, and significant mechanical strength. Poly(ethylene oxide)-based all-solid-state polymer electrolytes (PEO-ASSPE) appear to meet these criteria. However, PEO-ASSPE exhibits poor stability at elevated temperatures, where localized overheating and internal thermal runaway can lead to battery short-circuit failure. To address these issues, this study employs a ethylene-methacrylic acid copolymer (EMAA) as a structural support polymer, blended via a eccentric rotor mixer. The homogeneously dispersed EMAA within the PEO matrix forms an interpenetrating network structure and interacts with other components, significantly enhancing the high-temperature electrochemical stability of the composite polymer electrolytes (CPEs) while maintaining ionic conductivity. Research has demonstrated that when the EMAA content is 40 wt.%, the resulting CPE-40EMAA exhibit high ionic conductivity (4.07 × 10 −4 S cm −1 ), a high lithium-ion transference number (0.564), a broad electrochemical stability window (5.1 V), and excellent high-temperature lithium metal cycling stability (stable cycling for 800 h at current density of 0.1 mA cm −2 ), which sufficiently meets the electrochemical performance requirements for ASSPEs in high-temperature energy storage batteries.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Xianrui Jiang,Tianyu Hu,Ke Yao,Ruotong Xiong,Jiashu Qu,Qichang Liu,Chaolu Niu,Potao Sun,Wenxia Sima
Thermal faults occur in the continuous operation of electrical equipment. This poses a threat to the stable operation of power systems. However, existing detection methods do not apply to large-scale temperature measurement scenarios due to high cost and poor stability. To solve the above problems, a reversible thermochromic microcapsule is proposed in this work. Silicone rubber composite can be endowed with thermal sensing capability by doping an appropriate amount of thermochromic microcapsules inside the silicone rubber matrix. The test results showed that the color of the obtained thermochromic composites changed sensitively with the change in external temperature. The material undergoes a sudden color change at about 50°C achieving a reversible color change from blue to colorless. The color difference before and after the color change can be up to 37.24. In addition, the color difference shows an exponential decay trend with time. When the dopant concentration of the microcapsules is 1.5 wt%, the composite material shows excellent color-changing performance, and the insulation strength is increased by 6.92% compared with the pure silicone rubber. Meanwhile, the water contact angle of the composite is 115.3°, which proves that it has good hydrophobicity. Notably, the thermochromic composite also showed excellent weathering properties in thermal aging experiments. The thermochromic microcapsule proposed in this work can realize the visualization of the local overheating state of the electrical equipment, which provides a new idea for the application of thermal fault prewarning of the electrical equipment.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Panpan Zhang,Susu Xing,Zibo Lin,Zhenxia Zhao,Hao Kong,Jing Li
Based on the high chemical stability and excellent end-group functionalization capability of polyhedral oligomeric silsesquioxane (POSS), this study utilized thiol-functionalized POSS (POSS-SH) in a click chemistry reaction with styrene-butadiene-styrene triblock copolymer (SBS). The objective was to design a functional group forming a chemical bond with the polymer matrix, resulting in the preparation of thiol-functionalized polyacrylonitrile (PAN) fibers chemically cross-linked with POSS-SH/PAN/SBS hybrid material. This hybrid material not only enhanced the compatibility between the components but also facilitated a connection between the fiber and SBS, thereby improving the mechanical properties of the modified asphalt. Fourier transform infrared spectroscopy, field emission scanning electron microscopy (FESEM), and atomic force microscopy analyses confirmed the successful modification of POSS-SH/PAN fibers. FESEM analysis of the modified asphalt verified that POSS-SH/PAN fibers contributed to strengthening the interfacial performance between the fiber and asphalt. Cone penetration and dynamic shear rheometer tests indicated that, compared to SBS-modified asphalt, PAN/SBS and POSS-SH/PAN/SBS-modified asphalt exhibited enhanced shear strength, deformation resistance, and viscoelastic properties. Additionally, at 46°C, the storage modulus (G′) of 1.5% POSS-SH/PAN/SBS-modified asphalt increased by 11% compared to 1.5% PAN/SBS asphalt, with increases of 13.75% and 10.8% in loss modulus (G″) and complex modulus (G*), respectively.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Zhijiao Chen,Cong Peng,Shichao Li,Zhanjun Wu,Tao sun
Phthalonitrile monomer containing oxazine ring (BPS-Ph) was synthesized using bisphenol-S, aniline, paraformaldehyde, and 4-nitrophthalonitrile via a two-step method. The differential scanning calorimetry (DSC) data of the curing process of BPS-Ph monomer indicates that the peak polymerization temperature of the cyan group is about 250°C and that confirms the promoting effect of oxazine ring on the curing reaction of phthalonitrile. The rheological data of E51/DDS containing BPS-Ph indicates that the BPS-Ph monomer also has promoting effect on the curing process. The activation energy was studied via the iso-conversional method principle. The activation energy corresponding to the E51/DDS crosslinking reaction is 75.79 and 60.54 kJ mol −1 , respectively, for pure E51/DDS and E51/DDS/BPS-Ph. Moreover, the activation energy of the crosslinking of phthalhydrazine is 74.1 kJ mol −1 which is rather lower than that in pure BPS-Ph, and that implies the synergistically catalytic effect of the oxazine ring and the amine. The addition of BPS-Ph monomer significantly improves the thermal behaviors of the thermoset. The char yield in N 2 atmosphere increased from 15.6% to 53.9% when adding 30% BPS-Ph to the E51/DDS. Moreover, the peak weight loss temperature decreased from 407 to 385°C. The phase separation size of poly-BPS-Ph in E51/DDS is about tens to hundreds nanometers according to the atomic force microscopy (AFM) phase diagram. It is indicated that incorporation of phthalonitrile monomer containing oxazine ring into epoxy/amine system is an applicable and effective way to promote the thermal behavior of the thermoset.
✓ 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）