JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 43
·e53050
·
IF 3.057
Lili Xing,Yirong Wang,Jin Cheng,Aijing Li,Jiali Gu,Xue Dong,Guoqiang Chen,Tieling Xing
With the rapid development of textile technology, single-function textile finishing is difficult to meet the current needs of people for textiles. Textiles with flame retardancy, superhydrophobicity, UV resistance, and other functions are increasingly favored by people. At present, most of the preparation processes of multifunctional textiles are complex and time-consuming. In this work, a flame retardant hexamethylenediamine tetramethylene phosphate ammonium salt of hexamethylenediamine - N, N, N′, N′ - tetra (methylphosphonic acid) (AHDTMPA) was synthesized using hexamethylenediamine tetramethylene phosphate (HDTMPA) and urea with aqueous solution as solvent. Then AHDTMPA and cetyltrimethoxysilane were added into the solution with methyl trimethoxysilane (MTMOS) and tetraethyl orthosilicate (TEOS) as precursors to obtain a multifunctional sol. Finally, the multifunctional cotton fabric can be obtained by immersing the cotton fabric in the multifunctional sol in one-step. The limiting oxygen index (LOI) and water contact angle (WCA) value of the finished cotton fabric was 27.6% and 131.4°, respectively. The FT-IR characterization results and the SEM analysis verified the synthesis of AHDTMPA. The micro calorimeter combustion (MCC) and thermo gravimetric (TG) analysis indicated that the finished samples had less heat release capacity and less weight loss. The smoke density test showed good smoke suppression of the finished cotton fabric. Moreover, the whiteness of finished samples was nearly unchanged. In this work, the flame retardant and hydrophobic multi-functional cotton fabric was prepared by one-step, and the method is simple and efficient. The prepared functional cotton fabrics can be widely used in home textile fabrics, automotive interior fabrics, clothing fabrics, flags, tents, and protective clothing.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 37
·e52878
·
IF 3.057
Jianhua Wu,Meng Li,Ying Cao,Jianmin He,Mingjin Xue,Aoqi Zhu,Yongyi Huang,Yiting Xu,Birong Zeng,Lizong Dai
Polyurethane is a promising topcoat in anticorrosive coating system. As a topcoat, the study on improving its weathering resistance is significative. In this work, we present an anticorrosive filler, named GOFA based on p-fluoroaniline chemical modified graphene oxide, and explored the potential of GOFA to improve the weatherability and corrosion resistance of polyurethane coatings. The results of the comprehensive experimental studies showed that the addition of 0.5 wt.% GOFA leaded to an improvement in the hydrophobicity of the polyurethane coating and the composite coating exhibits an excellent shielding effect against corrosive media. At the same time, the ultraviolet aging resistance the GOFA modified polyurethane composite coating also showed satisfactory results. It is inspired that adding a small amount of GOFA can make the composite polyurethane coating have excellent anti-corrosion performance and weather resistance.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 38
·e52896
·
IF 3.057
Jiaojiao Lv,Bing Chen,Botuo Zheng,Mingfeng Chen,Huawei Qiao,Shanshan Li,Huagui Zhang
Aimed at promoting the flame retardancy of epoxy resin (EP) and widening its applications, a novel flame retardant, poly(phosphorus-silicon-alkyne) (PPSA), is synthesized from poly(silicon-alkyne) and 9,10-dihydro-9-oxa-10-phenanthroline-10-oxide (DOPO) to modify EP. The structure of PPSA is characterized by Fourier transform infrared and 1 H nuclear magnetic resonance. The PPSA introduction into EP significantly improves its chemical and physical properties. When containing 2.5–10 phr of PPSA, the modified EP achieve better flame resistance capability than neat EP. In particular, EP/PPSA-5.0 reaches a limiting oxygen index value of 31.2% and passes vertical burning test (UL-94) V-0 rating at the same time. The total heat release and total smoke production are lowered by 31.1% and 24.9%, respectively. In addition, the initial decomposition temperature ( T 5% ) of the modified EP is basically unchanged thanks to good stability of PPSA. Characterization of char residues generated in the combustion of EP/PPSA reveals that PPSA protects the EP from fire by diluting flammable gas with phosphorus free radicals and forming compact thermal stable layer containing silicon and phosphorus. Subsequently, measurements of mechanical properties show that impact strength and flexural strength are markedly improved by PPSA incorporation. Therefore, PPSA modifies EP to obtain excellent thermal stability and mechanical properties, justifying an outstanding flame retardant with comprehensive properties.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 35
·e52842
·
IF 3.057
Jie-Ping Fan,Cong-Bo Huang,Yu-Tong Cheng,Chun-Fang Xie,Hui-Ping Chen,Hai-Long Peng
Bio-macromolecule hemoglobin (Hb) is a kind of iron-rich metalloprotein that abundant in erythrocytes with various physiological properties. Separating Hb from bio-matrix with high efficacy is crucial to Hb application but quite challenging. In this study, a supermacroporous molecularly imprinted membrane (MIM) was prepared with high performance on recognizing bovine hemoglobin (BHb). By using the silk fibroin and calcium alginate as mechanical modifiers, the mechanical strength of the prepared membrane was significantly improved to at around 0.25 MPa, and the supermacroporous structure in MIM was also formed. The MIM adsorption capacity of BHb was as high as 121.8 mg g −1 at the initial concentration of 0.5 mg mL −1 . The MIM separation factor of BHb from BHb/BSA mixtures was as high as 7.34, and the relative imprinting factor was at around 4.0. The prepared MIM demonstrated the superiority and the valuable application prospect on specific separation of BHb.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 38
·e52920
·
IF 3.057
Wei Wang,Li Lei,Qiuru Bao,Yuan Liu,Qi Wang
The flame retardant work of polyolefin materials has always been a challenge in the industry. Herein, we report a triazine charring agent (TM) containing hydroxyl and triazine ring. Combined with ammonium polyphosphate (APP), TM was applied to prepare flame retardant thermoplastic polyolefin (TPO) composites. The results of thermogravimetric analysis (TGA) test show that TM has high initial pyrolysis temperature and retention rate of char residue at high temperature. The UL-94, limit oxygen index (LOI) and cone calorimetry tests (CCT) were used to characterize the flame retardancy of TPO composites. The UL-94 V-0 rating and LOI value of 29.2% are achieved with a loading of 9.17 wt% flame retardant (TPO-3). In particular, the fire performance index (FPI) associated with the flashover time also increases to 0.037 m 2 s/kW compared with TPO (0.030 m 2 s/kW). The synergistic effects of APP/TM were investigated in depth. The results show that APP/TM system forms a dense and continuous char layer on the surface of TPO during combustion, which effectively insulates the substrate from heat and oxygen erosion. Additionally, APP/TM system also plays a weak but important flame retardant role in the gas phase, including quenching effect of phosphorous compounds and dilution effect of non-combustible gases.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 39
·e52858
·
IF 3.057
Xiankun Wu,Chang-an Xu,Mangeng Lu,Kunxin Wang,Zhao Li,Hui Yang
To explore high thermal properties, low dielectric constant and loss for copper clad laminates, poly(phenylene oxide) (PPE) with different end groups (allyl and epoxide groups) were successfully prepared. Firstly, low molecular weight polyphenylene ether was synthesized using the redistribution method. Then the polyphenylene ether thermosetting polymers by modifying their terminal hydroxyl groups were reported and their fundamental materials properties were compared. Through property tests and data analyses, it was found that PPE with vinyl end groups had the best performances, especially high glass transition temperature (about 230°C), the thermal conductivity was 0.32–0.38 Wm −1 K −1 , low dielectric constant (about 2.5) and low dielectric loss (about 4.4 × 10 −3 ). The possible reason was that the main chain of polyphenylene ether contains non-polar crosslinkable group (CC). In a word, through properties comparison of thermosets of PPE, the results demonstrated that the materials of all systems were suitable for using as printed circuit boards.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 41
·e52996
·
IF 3.057
Yue Qin,Mengdi Chen,Jinzhao Li,Yuechuan Wang
Cycloaliphatic diepoxides, CAEs, are well known for their better thermal, chemical and optical properties, compared with the glycidyl ether type epoxides. However, the shortages including low moisture resistance, and high reflective index or high dielectric constant limit their use for the emerging advanced optical and electronic applications, In this work, we have synthesized two new cycloaliphatic diepoxides containing different fluorinated linkers (2,2′-((2,2,3,3-tetrafluorobutane-1,4-diyl)bis(oxy))bis(7-oxabicyclo[4.1.0]heptane) (TCE) and 2,2′-((2,2,3,3,4,4,5,5-octafluorohexane-1,6-diyl)bis(oxy))bis(7-oxabicyclo[4.1.0]heptane) (OCE) and characterized their chemical structures using 1 H NMR, 19 F NMR, and Fourier transform infrared spectroscopy. We have cured these two fluorine-containing CAEs, using hexahydro-4-methylphthalic anhydride (HMPA) and compared them with a commercial CAE, 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate (ERL-4221) under the same condition. Compared to the cured ERL-4221 (C-ERL-4221), the cured fluorinated CAEs (C-OCE, C-TCE) have much better water resistances (saturated water absorption after 6 days in water: 0.70%, 1.72%, and 2.83%, for C-OCE, C-TCE, and C-ERL-4221, respectively) and lower dielectric constant ( D k ) ( D k : 2.54–2.44 and 2.78–2.66 vs. 4.01–4.00 @ 1 Hz-5 MHz), and similar thermal stability (the statistical heat-resistant index [ T s ]: 169°C, 175°C vs. 175.5°C), although their glass transition temperature ( T g ) and storage moduli are lower ( T g : 136°C, 171°C vs. 250°C; moduli: 0.56GPa, 1.25GPa vs. 1.38GPa). These results reveal that fluorine atoms on the linkers effectively reduce dielectric constant and improve hydrophobicity and wettability, providing new insights into the design of fluorine-containing cycloaliphatic diepoxides.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 42
·e53041
·
IF 3.057
Yijun Zhang,Dawei Pan,Changfan Chang,Hua Liu,Zuozhen Liu
A highly reactive intrinsic epoxy flame retardant FREP was successfully synthesized via ring-opening reaction between DOPO and amino-tetrafunctional epoxy resin (AG-601), and the structure of the synthesized FREP was characterized by FTIR and MS. FREP was then introduced into the epoxy resin as an additive, aiming to improve fire safety. The flame-retardant properties and thermal stabilities of epoxy thermosets were investigated by limiting oxygen index (LOI), vertical burning test (UL94) and cone calorimetry (CONE). The results indicated that EP/FREP-4 thermoset passed UL94 V-0 rating with a LOI value of 34.6%, where the phosphorus content was 1.5 wt%. When compared with neat EP, the peak heat release rate (pk-HRR), total heat release (THR) and total smoke production (TSP) decreased by 63.1%, 42.6%, and 22.1%, respectively. Meanwhile, the lower av-EHC of EP/FREP thermosets indicated that FREP plays a significant role in gas-phase flame retardancy. Additionally, DMA analysis showed that FREP improved the crosslinking density of EP, which had little effect on the glass transition temperature ( T g ). Thermogravimetric analysis (TGA), Py-GC/MS analysis, and SEM were used to investigate the flame retardant mechanism. Excellent flame retardancy was attributed to phosphorus and nitrogen's synergistic effect in the gas and condensed phases.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 41
·e52981
·
IF 3.057
Wanfen Pu,Kaiping Tian,Hongzhou Wang
A low viscosity amphoteric polyacrylamide (LHPAM) was synthesized with Acrylamide and a Cationic etherifying agent. FTIR, SEM, and EDS all suggest that it successfully synthesized a new material. It can be demonstrated from TG and DSC that the temperature resistance of LHPAM is higher than that of partially hydrolyzed polyacrylamide (HPAM) and it can be found from ultraviolet–visible spectrophotometer that the flocculability of LHPAM is stronger than that of HPAM. The viscosity testing shows that the viscosity of LHPAM is greater than that of HPAM at the beginning, but the viscosity of LHPAM has been ultimately lower than that of HPAM after 1d. In addition, LHPAM reacts with Cr 3+ to form a gel with an interpenetrating network structure, while HPAM is a gel with a comb-shaped system, and the gelation time of LHPAM is longer than that of HPAM. However, the final gelation strength is the same. The final flow experiment shows that the plugging rates of LHPAM and HPAM are greater than 95%, but the resistance coefficient of LHPAM is smaller than that of HPAM. This study expands the application of HPAM in profile control and water shutoff, which is of great significance for enhanced oil recovery.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 42
·e53034
·
IF 3.057
Yu Feng,Ziyuan He,Zhijie Yang,Wenxin Tang,Qingguo Chi,Qingguo Chen
The bottleneck problem of the development of high-voltage motors to a larger capacity can be solved if the thermal conductivity is improved without sacrificing the insulation characteristics of the main insulation material. In this paper, a spraying technology based on electrospinning is proposed that can evenly spray boron nitride (BN) with high thermal conductivity onto the surface of mica tape. With the increase in BN content, the insulation and thermal conductivity of mica tape are optimized to varying degrees. When the BN content reaches 2.25 wt%, the in-plane conductivity increases from 1.6 to 2.7 w/(m K), while the out-of-plane conductivity increases from 0.17 to 0.26 w/(m K). Additionally, the direct-current (DC) breakdown strength has increased from 90.6 to 96.9 kV/mm and the dielectric constant and dielectric loss are almost unchanged. Finally, through simulation verification, if the modified mica tape is applied to the main insulation of a synchronous motor, the operating temperature of the motor insulation will be reduced from 73.5 to 66.1°C. This study provides a new research idea for the preparation of high thermal conductivity insulating materials.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 38
·e52901
·
IF 3.057
Yu-Fan Hu,Xue-Jun Zhou,Shi-Hao Ni,Feng-Yang Wu,Ji-You Zong,Tai-Bao Yang,Ding-Xiang Yan,Jian-Hua Tang,Jun Lei,Zhong-Ming Li
Thermal interface material (TIM) is crucial for electronic devices to dissipate heat, but the high interface thermal resistance between polymer matrix and filler is a major problem affecting its thermal conductivity (TC). In this study, we prebuilt excellent thermally conductive pathway of isotropic spherical boron nitride (sBN) using a facile method, that is, pressing fillers, to decrease the interface thermal resistance before filling matrix silicon rubber (SR), and prepared a TIM with high isotropic TC. At 50 wt% filler content, the through-plane and in-plane TCs of sBN/SR composite reached 9.36 and 7.82 W/(m·K), respectively, which are higher than the highest value of previous research on bulk BN/SR composites (not including film), 4.13 and 6.56 W/(m·K), respectively. Meanwhile, the thermal decomposition temperature of TIM is 47.2°C higher than that of pure SR. In addition, the TIM has a low hardness (shore A hardness <70) and can be bent and folded, so can be used to substitute traditional thermally conductive silicone pad.
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 39
·e52943
·
IF 3.057
Congyang Ma,Sheng Wang,Yage Li,Tianjia Yu,Youwei Yao,Hongda Du,Qiang Cai
Generally, foamed epoxy resin prepared by chemical method has relatively large average cell size and low cell density, resulting in low mechanical properties and poor heat resistance. In this work, a new type of composite foaming agent (CFA) was prepared by filling the chemical foaming agent 4,4′-bisoxybenzenesulfonyl hydrazide (OBSH) into microporous silica microspheres (MSMs), and then used for epoxy resin foaming research. The effects of curing agent diethylenetriamine (DETA) and CFA contents on cell density and size were also discussed. The best epoxy resin foaming sample has a cell density of 10 6 cells cm −3 with an average cell diameter of 65 μm, and a high compressive strength of 34 MPa as well as a good heat resistance. These results indicate the potential application of CFA in epoxy resin foaming area.
✓ 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）