JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 140
·期 7
·e53465
·
IF 3.057
Zhoufeng Wang,Junwei Hu,Bolin Wang,Yingying Liu,Xiubo Long
A series of novel copolyarylates(co-PARs) containing phenol red units in the backbone were synthesized by interfacial polymerization at 10°C from bisphenol A (BPA), phenol red (PR) and diacid chloride monomers. The obtained copolyarylates (co-PARs) are all amorphous, the inherent viscosity ( η inh ) of 0.22–0.62 dl g −1 , and the number- and weight-average molecular weight are 10,200–46,200 and 38,600–203,600, respectively. Adding a small number of PR units to the molecular chains improved the processing fluidity of polyarylates, and the glass transition temperatures ( T g ) decreased from 202.8 to 166.7°C. In addition, the co-PARs have excellent thermal stability with the maximum thermal decomposition temperature of 532.4–545.2°C. The co-PARs show the best mechanical properties (57.6 MPa) when the PR content is 15 mol%. The transmittances of the co-PARs at 400 and 450 nm are 79.2%–97.9% and 87.0%–99.8%, respectively, and the cut-off wavelength is between 320 and 328 nm. The designed and synthesized copolyarylates can be considered as a promising and easy-to-process high-performance engineering plastic.
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
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 36
·16107-16118
·
IF 2.7
Zhoufeng Wang,Bolin Wang,Yingying Liu,Xiubo Long,Wenlong Yao
A series of linear block polymers and random polymers were synthesized by interfacial polycondensation using two bisphenols with similar structures, bisphenol S (BPS) and bisphenol A (BPA), and terephthaloyl chloride and isophthaloyl chloride. Random polymers and block polymers with the expected topology were structurally characterized by 1H NMR, FTIR, GPC, WAXD, and Raman spectroscopy. The results demonstrated that there was no significant difference in the thermal stability of the block and random polyarylates, which was due to the fact that the covalent bonds of the linked monomers did not change substantially, and the bond energies were the same. However, due to the alteration of the molecular sequence structure, the block polymer exhibited a lower glass transition temperature, a pronounced melting peak, and better solubility. With physical cross-linking points consisting of microcrystalline phases formed by the relatively regular molecular chain structure, the block polyarylates exhibited a higher modulus of elasticity than the random polyarylates. This illustrated that it is possible to prepare new functional polyarylates without changing the monomer composition, but only by manipulating the reaction process.
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
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2025
·
IF 2.7
Hong Chen,Zhibo Huang,Qingyan Fan,Jinbao Guo
Thermotropic liquid crystalline polyarylates (TLCPs) with low dielectric loss at high frequencies have garnered significant attention due to their exceptional properties and high frequencies communication application. To investigate the influence of molecular structures on the dielectric constant and loss factor of TLCPs, 4,4′-dihydroxy diphenyl sulfone (SDP), 4,4′-dihydroxy diphenyl ether (ODP), 4,4′-dihydroxy diphenyl ketone (DHBP), and 4,4′-dihydroxy diphenyl sulfide (TDP) are introduced to copolymerize with 6-hydroxy-2-naphthoic acid (HNA) and terephthalic acid (TA) by one-pot melt polycondensation, which are defined as TLCP-I, TLCP-II, TLCP-III, and TLCP-IV, respectively. All prepared ternary TLCPs exhibit a nematic LC state between 300 and 350 °C, and the crystallinity of the modified TLCPs is reduced to a certain extent by introducing bisphenol moieties compared with the referenced polyarylate (TLCP-0) from 4-hydroxybenzoic acid (HBA) and HNA. Meanwhile, the consequent TLCPs exhibit good thermal stability, and the maximum weight loss rate temperature exceeds 500 °C. Furthermore, the initial storage modulus of TLCP-II, TLCP-III, and TLCP-IV films at room temperature are 1.2, 0.85, and 1.5 GPa, respectively, showing good tensile strength. Most importantly, the dielectric loss factors of TLCP-II, TLCP-III, and TLCP-IV are much less than 0.01 in the range of 1–10 4 kHz, thus suggesting an ideal low-dielectric-material candidate.
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 MEMBRANE SCIENCE
·
2024
·
IF 8.4
Heguo Han,Zheng Liu,Huiting Yu,Yuxuan Sun,Shenghai Li,Suobo Zhang
For thin-film composite (TFC) membranes applied in organic solvent nanofiltration (OSN), enhancing the adhesion between the active layers and the substrates can effectively improve the stability of the membranes. In this work, TFC OSN membranes with polyetherketone bearing amino group (PEK-NH 2 ) asymmetric substrates and amino-contained polyarylate active layers were fabricated by interfacial polymerization technique, and subsequently reacted with dialdehydes to form crosslinking between and within the substrates and the active layers. Crosslinking improved both of the solvent resistance of the substrates and the separation selectivity of the active layers. In addition, reverse pressure testing demonstrated that crosslinking allowed the active layers to adhere more strongly to the substrates. The optimized integrally crosslinked membranes exhibited methanol permeance of 10.4 L m −2 h −1 bar −1 and a molecular weight cut-off of about 320 g mol −1 in methanol. Moreover, the integrally crosslinked membranes maintained good stability for OSN operation in methanol for 12 days, and also exhibited unchanged OSN performance after soaked in N,N -dimethylformamide for 2 days. This work demonstrated a novel solvent-resistant membrane material and membrane-fabrication strategy with prospect for OSN application.
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
HIGH PERFORMANCE POLYMERS
·
2025
·
IF 1.6
Zeyuan Liu,Qian Liu,Peiqi Xu,Zhaoqi Wang,Danhui Wang,Xigao Jian,Shouhai Zhang
Novel polyarylates containing phthalazinone moieties (PAR-PH) were synthesized and characterized by co-solvent interfacial polymerization based on 4-(4′-hydroxyphenyl)-2,3-phthalazin-1-one (DHPZ) and isophthaloyl chloride (IPC). Effects of inorganic bases, monomer concentration, phase transfer catalysts and co-solvents on the interfacial polymerization reaction were investigated. When the organic phase solvent was cyclohexane with 3% butanone and 18-crown-6 was the phase transfer catalyst, PAR-PH achieved a maximum intrinsic viscosity (ηint) up to 0.52 dL/g. For some organic phase solvents of alkanes and chlorinated hydrocarbons, the addition of co-solvents increased the ηint of the polymer. PAR-PH exhibit excellent thermal resistance due to the introduction of rigid twisted phthalazinone moieties into the polymer main chains, with glass transition temperature (Tg) of 275°C. The 5% thermal weight loss temperature of PAR-PH was 463°C in N2 and residual mass ratios at 800°C of 52.0%, demonstrating excellent thermal stability.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
POLYMER INTERNATIONAL
·
2019
·Vol. 68
·期 10
·1729-1738
·
IF 2.433
Xinghua Guan,Heran Nie,Honghua Wang,Jiyong Zhao,Zhipeng Wang,Guangyuan Zhou,Qiang Gu
A series of copolyarylates (PP0–PP100) containing phthalide groups was synthesized via interfacial polymerization from a mixture of phenolphthalein (PP) and bisphenol A with molar equivalent of terephthalyl chloride. Incorporating PP into the polymer chain improved the solubility of the polyarylates in common organic solvents. The glass transition temperature (191–314 °C), residual weight percentage, Young's modulus (1.7–2.8 GPa), solubility and complex melt viscosity of the copolyarylates increased with increasing PP units in the copolymerization. By contrast, crystallinity and elongation at break (14.1 to 11.2%) of the copolyarylates decreased with increasing PP units in the polymer backbone. When the PP content increased over 30 mol% (PP30), the copolyarylates became amorphous polymers. When the PP content was below 30 mol%, the copolyarylates exhibited good melt processability. With regards to its solubility, thermal stability, mechanical properties and melt processability, PP30 may be considered as a promising candidate in the field of processable high-performance engineering plastics. © 2019 Society of Chemical Industry
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
POLYMER
·
2025
·
IF 4.5
Yu Zhang,Guang-ming Yan,Jie Yang,Gang Zhang
Low dielectric polymers are urgently needed in wireless communication. Compared with porous structure, the introduction of free volume can reduce the dielectric constant without damage the mechanical properties. Therefore, a new kind of low dielectric constant polyarylates with furan as the reactive pendent groups (PAFRs) were innovatively designed and synthesized based on furfural. The introduction of pendent furan groups was found to increase the free volume and molecular chain space that further affect the dielectric properties. The dielectric constant and dielectric loss of PAFRs decreased down to 2.57–2.92 and 0.005–0.0091 at 1 MHz, respectively, with excellent thermal (T g > 209 °C) and mechanical properties (Tensile strength >73 MPa). Furthermore, reversible crosslinked low dielectric constant polyarylates (C-PAFR) were designed and prepared by dynamic covalent based on pendent furan groups. The crosslinked structure further reduced the dielectric constant as the dielectric constant of crosslinked PAFR films (C-PAFR23) could even decrease down to 2.17. In addition, the dynamic crosslinked structure endowed C-PAFRs with excellent solvent resistance and good re-processability with the on/off Diels-Alder reaction. We believe such recyclable dynamic crosslinked low dielectric materials are interesting and would be applicable in the field of wireless communication.
研究领域:
材料科学
·
无线通信材料
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Zhe Zhai,Chi Jiang,Na Zhao,Wenjing Dong,Peng Li,Haixiang Sun,Q. Jason Niu
Preparation of highly permeable and selective organic solvent nanofiltration (OSN) membranes is desired for precise chemical separations. Although the emerging nanomaterials and novel preparation methods have significantly boosted the membrane performance, it still requires much effort to drive them toward scale-up production with lower cost and easier preparation process. Herein, we constructed a polyarylate membrane from one kind of porous organic cage, namely Noria through traditional interfacial polymerization technique. Under the catalysis of triethylamine, Noria in aqueous phase would react with terephthaloyl chloride (TPC) in hexane to form a dense nano-film. The inner cavity of Noria molecule provided nano-channel for both polar and non-polar solvents to transport through the membrane. Specially, the Noria + TPC membrane exhibits a high permeance for methanol up to 18 L m −2 h −1 bar −1 . This is resulted from the low interaction energy between methanol and Noria as revealed by the molecular dynamics (MD) simulation. In addition to the excellent performance, the simple preparation process with low-cost materials suggests the great potential of Noria + TPC membrane for practical application. Moreover, it would inspire the exploration of other molecules with tailored chemical structures for the assembly of high-performance membranes in future.
研究领域:
材料科学
·
化学工程
·
分离技术
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Shuwen Yu,Shichun Li,Huazhao Wang,Chunhua Zhu,Jingwei Hou,Sheng Cui,Xiaodong Shen,Yu Liu
The Kr/Xe separation based on membranes is of great significance for radioactive 85 Kr capture from nuclear fuel reprocessing plants and expensive Xe production, thus the membrane material that has both high separation performance and stability is highly sought after. Herein, the crosslinked polymeric micro-porous polyarylate (PAR) membrane was synthesized by interfacial polymerization, and its Kr/Xe separation performance and stability under various conditions including γ irradiation were investigated. The PAR membrane displays Kr permeance of 0.22 GPU and Kr/Xe selectivity of 3.6 tested with mixed gas at room temperature, which is better than other reported polymeric membranes and even better than the amorphous carbon membrane. After the γ irradiation, the PAR can preserve its chemical structures , while the physical ageing is accelerated, which leads to only 25% decrease in Kr/Xe selectivity after 20 kGy irradiation. This work demonstrates that the micro-porosity and the crosslinking structures play crucial roles in improving both separation performance and stability of polymeric membranes for radioactive Kr/Xe separation.
研究领域:
材料科学
·
核能工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 28
·e54044
·
IF 3
Zhoufeng Wang,Yingying Liu,Bolin Wang,Xiubo Long,Junwei Hu
A series of polyarylates composed of different bisphenol monomers were synthesized by interfacial polymerization using 9,9-bis(4-hydroxyphenyl)fluorene (BHPF), 2,2-bis(4-hydroxyphenyl)butane (BPB), terephthaloyl chloride (TPC), and isophthaloyl chloride (IPC) as raw materials. The DFT calculations showed that the energy required for the reaction of BHPF with TPC/IPC was between 15.82 and 16.04 Kcal/mol, which was higher than the energy required for the reaction of BPB with TPC/IPC of 8.05–8.40 Kcal/mol. The solubility test showed that the solubility of BHPF-BPB-type polyarylate was better than that of BPB-type polyarylate in various organic solvents with T g ranging from 199.3 to 215.0°C, indicating that the solubility was improved while increasing the T g of the products. The weight loss ( T 5% ) and maximum weight loss ( T max ) of BHPF-BPB-type polyarylates under N 2 atmosphere ranged from 464.6–489.4°C and 521.7–534.6°C, indicating good thermal stability. The tensile strength of the BHPF-BPB-type polyarylates ranged from 53.21 to 61.23 MPa, Young's modulus ranged from 1479.66 to 1867.23 MPa and elongation at break ranged from 19.5% to 30.1%. The mechanical property test showed that the BHPF-BPB-type polyarylates have high tensile strength. These characteristics indicate that BHPF-BPB-type polyarylates have a very broad potential for application in engineering plastics.
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
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 23
·10497-10506
·
IF 2.7
Zhoufeng Wang,Yingying Liu,Bolin Wang,Xiubo Long,Wenlong Yao
Random and block polyarylates were synthesized using bisphenol A (BPA), bisphenol fluorene (BHPF), terephthaloyl chloride (TPC), and isophthaloyl chloride (IPC) as raw materials. The synthesis strategies of one-step and stepwise interfacial polymerization methods were adopted. Both types of polyarylates exhibited similar solubility, with block polyarylates showing slightly broader solvent selectivity. The presence of large sterically hindered fluorene groups in BHPF monomers rendered both block and random polyarylates amorphous by restricting the movement of macromolecular segments. The polyarylates demonstrated excellent thermal stability (T5% = around 490 °C) and a high glass transition temperature (Tg > 210 °C). As the covalent bonds of the monomer linkage showed no significant difference, the thermal stability of both types of products was similar. The glass transition temperature increased with an increase in TPC and diefluorene monomer content. The tensile strengths of the random and block polyarylate films ranged from 45.77–69.89 MPa and 49.49–55.29 MPa, respectively, indicating the high tensile strength of the resulting polyarylates. While the block polyarylates did not show significant differences from the conventional properties of random polyarylates, the synthesis of block polyarylates in this study represents a novel attempt, further highlighting the significant influence of the large pendant group of the main chain on the ordered arrangement of molecular segments.
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
JOURNAL OF POLYMER RESEARCH
·
2013
·Vol. 20
·期 10
·1-9
·
IF 2.019
Liu Pengqing,Zeng Luxian,Ye Guangdou,Xu Jianjun
A series of co-polyarylates containing m -aryl ether units were synthesized from bisphenol A, 1,3-bis(4′-formylchloridephenoxy)benzene and terephthaloyl chloride via interfacial polycondensation in order to improve the processability of the bisphenol A-based polyarylate (U-polymer). The structure and properties of the co-polyarylates were characterized using infrared spectra, differential scanning calorimety, thermogravimetric analyses, wide angle x-ray diffraction and solubility testing, etc. The results show that the introduction of the asymmetry and flexible m -aryl ether units could improve the solubility obviously, but the solubility parameter of the co-polyarylate almost keeps a constant with changing the content of m -aryl ether units. As the content of m -aryl ether unit increases, the crystallization ability of the polyarylate weakens, meanwhile, the melting temperature shifts to low temperature as expected and the melting enthalpy reduces. When the content of the m -aryl ether units is higher than 60 %, the co-polyarylates become amorphous polymers. Moreover, there is almost no reduction of the thermal stability with increasing the content of the m -aryl ether units. In addition, the stability of each chemical bond of the co-polyarylate to thermal decomposition was systematically studied by means of pyrolysis-gas chromatography/mass spectrometry, and the thermal decomposition mechanism of the co-polyarylate was obtained.
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
危险品化学品经营许可证（带存储）