MACROMOLECULAR RAPID COMMUNICATIONS
·
2023
·Vol. 44
·期 20
·2300344
·
IF 4.6
Fangjun Liu,Chenxi Shen,Feng You,Wufan Zhao,Caoting Deng,Xueliang Jiang
High-performance polypropylene (PP) foam is a vital polymer product in industrial areas. However, the poor melt strength of ordinary PP homopolymer limits its foaming molding. In this work, high melt strength polypropylene (HMSPP) is prepared by using styrene (St) and tripropylene glycol diacrylate (TPGDA) as comonomers, and then PP foams are prepared by mold foaming method. The results show that adding St in the grafting process of TPGDA will obviously improve the melt strength of the PP matrix, and its melt strength (28 184 Pa.s) is 7.4 times higher than that of pure PP. HMSPP foam has more regular and uniform cells and higher cell density, which significantly improves the sound and thermal insulation properties of PP foam. Compared with pure PP foam, the average sound transmission loss (52.9 dB) of HMSPP foam with a low foaming ratio increased by 64%, and the thermal conductivity (0.0867 W mK −1 ) decreased by 46%. Therefore, the obtained HMSPP foam can be used in sound insulation or thermal insulation area. This work provides an available route for the high-performance utilization of PP foam.
研究领域:
材料科学
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聚合物工程
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产品关联
DOI
PubMed
高影响因子
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2019
·Vol. 305
·期 1
·1900452
·
IF 3.038
Ya-Lan Yu,Zi-Han Zhou,Wan-Ting Yu,Yu-Zhen Song,Min-Qian Xie
Magnetic, porous poly (tripropylene glycol diacrylate) (PTPGDA) microspheres are successfully prepared using a combination of microfluidic emulsification and free-radical polymerization. The porous structure can be precisely controlled by controlling the amount of the oil-phase emulsifier polyglycerol polyricinoleate (PGPR). The effects of PGPR content and pH on the contact angle of the microspheres is investigated. The contact angle of the microspheres increases with the raise of PGPR content, and the hydrophobicity of the microspheres remains stable at different pHs. The microstructure, magnetic properties, and oil adsorption abilities of the microspheres are also studied. The as-prepared microspheres perform adsorption well, the higher the PGPR content, the more pore structures and larger contact angle occurres on the microspheres, which improves the adsorption capacity. In addition, the adsorption capacity of the microspheres for diesel can reach 3.38 g·g −1 when the mass fraction of PGPR in oil phase is 50% w/v. After adsorbing oil, the microspheres can be separated, recovered, and reused by applying an external magnetic field. The magnetic microspheres have good oil adsorption abilities and recyclability, which shows their potential for use in oil removal.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
POLYMER SCIENCE SERIES B
·
2014
·Vol. 56
·期 5
·632-638
·
IF 0.633
Shi Jingsong,Chen Penghui,Wang Kemin,Lu Jian,Nie Jun
A novel polymeric photoinitiator based on benzoxazine was synthesized by introducing 4-hydroxy benzophenone, diglycolamine and paraformaldehyde into the macromolecular chain. Its molecular structure was characterized by 1 H NMR, FTIR, and UV-Vis spectroscopy. Photopolymerization of tripropylene glycol diacrylate and trimethylolpropane triacrylate initiated by polybenzoxazine, benzoxazine, and benzophenone was studied by real time FTIR spectroscopy. The results obtained are discussed.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2014
·
IF 2.302
Kemin Wang,Kun Yang,Qiang Yu
A novel polymeric photoinitiator, poly(glycidyl benzophenone ether) (PGBE), with a side-chain benzophenone (BP) group was synthesized from poly(epichlorohydrin) and 4-hydroxybenzophenone. The structure of PGBE was characterized by IR and 1 H NMR. The light absorption of PGBE was detected by UV spectrophotometer with the maximum absorption wavelength at 283 nm in acetonitrile solvent, which were red-shifted compared with BP. The obvious advantage of this initiator was the elimination of amine based hydrogen donors and to provide alternative hydrogen donors with easy availability and non-toxicity. The photopolymerizations of tripropylene glycol diacrylate (TPGDA) and trimethylolpropane triacrylate (TMPTA) initiated by PGBE and BP/EDAB were studied by real-time FT-IR. The polymeric initiator was found to have higher efficiency than BP/EDAB.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
Nuclear Engineering and Technology
·
2015
·
IF 0.77
Jun Wei,Xiang Li,Tong Song,Zi-Fan Song,Zhen-Qi Chang,Da-Qiao Meng
The catalytic exchange of hydrogen isotopes between hydrogen and water has been known to be a very useful process for the separation of tritium from tritiated water. For the process, a highly active hydrophobic catalyst is needed. This study provides an effective fabrication method of size-controlled platinum/poly[styrene-divinylbenzene-tri(propylene glycol) diacrylate] [Pt/poly(SDB-TPGDA)] hydrophobic catalyst beads with a narrow size distribution. Platinum nanoparticles were prepared by γ-ray-induced reduction in the aqueous phase first, and then uniformly dispersed in SDB-TPGDA comonomer after the hydrophobization of platinum nanoparticles with alkylamine stabilizers. The porous Pt/poly(SDB-TPGDA) hydrophobic catalyst beads were synthesized by the UV-initiated polymerization of the mixture droplets prepared in a capillary-based microfluidic system. The size of as-prepared catalyst beads can be controlled in the range of 200–1,000 μm by adjusting the flow rate of dispersed and continuous phases, as well as the viscosity of the continuous phase. Sorbitan monooleate and cyclohexanol were used as coporogens to control the porosities of the catalyst beads.
研究领域:
化学工程
·
材料科学
·
核化学与化工
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Zhenyin Guo,Qingshan Yang,Songhan Wan,Kang Zhu,Hongtao Li,Chen Peng,Xianru He
Ethylene-vinyl acetate (EVM) rubber exhibits relatively poor elasticity, restricting its wide application. The effects of flexible vulcanization agents, ethylene glycol dimethacrylate (EGDMA) and tripropanediol diacrylate (TPGDA), on the mechanical properties and vulcanization characteristics of EVM were studied. At a 3 phr dosage, EGDMA and TPGDA increased elongation at break by 23.5% and 37.0%, respectively, while improving tension set recovery. These agents extended scorch time and reduced optimum vulcanization time. Vulcanization kinetics analysis demonstrated that these two agents shortened vulcanization time, improved production efficiency, and reduced initial reaction temperature (10°C–20°C) and activation energy (7–21 kJ/mol). This study offers a low-cost and simple method to enhance the elasticity and vulcanization properties of EVM and other rubber materials.
研究领域:
高分子科学
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材料工程
·
化学工程
·
应用化学
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2024
·
IF 4.1
Weifeng Ma,Wei Jia,Yanjing Gao,Fang Sun
In this study, we designed and synthesized four α-ketone aryl thioesters photoinitiators ( PTEs ) with excellent cytocompatibility for LED photopolymerization using a simple one-step reaction. We investigated the potential photopolymerization initiation mechanisms of PTEs under 405 nm LED irradiation through ultraviolet–visible absorption spectroscopy, high-resolution mass spectroscopy, and electron spin resonance. Our findings revealed that PTEs can effectively initiate the photopolymerization of acrylate monomer tripropylene glycol diacrylate (TPGDA) under either 405 nm or 455 nm LED irradiation, achieving double bond conversions of approximately 80 % or higher after 180 s of irradiation. Remarkably, compared to the commercial photoinitiator 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (TPO) and benzoyl methacrylate (MBF), PTEs exhibit certain advantage in initiating photopolymerization of triethylene glycol dimethacrylate (TEGDMA) widely used for dental materials under the irradiation of 405 nm. More importantly, MO-PTE has better cytocompatibility compared to TPO and exhibits a great potential in the fields of LED photopolymerization, biomaterials and food packaging.
研究领域:
材料科学
·
高分子化学
·
生物医学工程
·
牙科材料
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Ying Zhou,Ying Tian,Wen Wang,Yu Zhou
Solid-state lithium metal batteries (LMBs) using nonflammable solid electrolytes (SEs) are considered to be the new generation of energy storage devices with high energy density and good safety. However, many challenges, such as insufficient room-temperature ionic conductivity of SEs and tremendous electrode-electrolyte interfacial impedance, hinder the commercialization of solid-state LMBs. Here, we reported a novel composite solid electrolyte (CSE), consisting of a three-dimensional (3D) Li 6.25 Ga 0.25 La 3 Zr 2 O 12 (LLZO) nanoparticle-based framework and filled tripropylene gycol diacrylate (TPGDA)-based gel electrolytes, in which the gel electrolytes are prepared by in situ polymerization of the TPGDA monomer in the condition of liquid electrolyte . Owing to the high content of LLZO powder and PVDF binder, the nonflammable CSE shows superior thermal stability and outstanding mechanical property. Moreover, the CSE exhibits high room-temperature ionic conductivity (1.66 × 10 −3 S⋅cm −1 ) due to the large amount of liquid electrolyte loaded in the 3D framework. Besides, in-situ gel electrolytes facilitate the interfacial contact between electrolyte and lithium anode. Therefore, the LiFePO 4 /CSE/Li cell exhibits excellent cycling stability at room temperature , delivering a capacity retention ratio of 86.5% after 350 cycles at 1 C. This work can provide guidance in designing CSEs for high-performance lithium metal batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
电池技术
✓ 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）