JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2023
·
IF 2.2
Qin Yin,Xuefen Wu,Xiaomei Wang
In this article, we synthesized a series of poly butyl acrylate-co-methacrylic acid-2-acrylamido-2-methyl propanesulfonic acid (PBAS) with different molecular weight and monomer molar ratios by 1,1-diphenylethene (DPE) method on industrial scale. The PBAS was applied as a dispersant for waterborne TiO2 paste to prepare waterborne inkjet ink. The successful synthesis of PBAS was confirmed by FTIR and 1H-NMR. To evaluate the printability and storage properties of pastes and inks, we characterized the particles, particle distribution, the storage modulus, viscosity, precipitation coefficient, and delamination height. The method creatively used in our study to characterize the printing smoothness of the ink in the industrial practical application was the filter rate of ink. We also proposed a method of using soft and hard precipitation to characterize the precipitation situation. The results of the experiment indicated that compared with commercial dispersants, PBAS5/6 had excellent performance in printing flow and anti-settling performance. This paper demonstrates the optimum dispersibility of PBAS was obtained when the molecular weight was 8500, the acid value was 100 mg KOH/g, and the 2-acrylamido-2-methylpropanesulfonic acid (AMPS) content was 20%. This fruitful work pointed out the great prospects of industrial synthetic water-based dispersants.
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
JOURNAL OF POLYMER RESEARCH
·
2015
·Vol. 22
·期 12
·1-8
·
IF 1.92
Zhao Minjian,Fu Zhifeng,Shi Yan,Yang Wantai
Poly(methyl methacrylate)- b -poly( tert -butyl acrylate) (PMMA- b -P t BA) block copolymers were prepared based on the new mechanism of 1,1-diphenylethylene (DPE) controlled radical polymerization in homogeneous systems. Firstly, monomer methyl methacrylate (MMA), initiator 2,2-azobisisoheptonitrile (ABVN) and a control agent DPE were solution polymerized to form DPE-containing PMMA precursor. Then the second monomer tert -butyl acrylate ( t BA) was simply heated in the presence of DPE-containing PMMA precursor used as macroinitiator, and block copolymers were synthesized successfully. The effects of polymerization temperature and solvent on molecular weight and molecular weight distribution of polymers throughout the polymerization were investigated. DPE-containing poly(styrene) precursor could not induce block polymerization.
研究领域:
高分子科学
·
材料化学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2018
·
IF 3.483
Pibo Liu,Hongwei Ma,Li Han,Lincan Yang,Heyu Shen,Chao Li,Yang Li
Three amine-functionalized 1,1-diphenylethylene (DPE) derivatives (DPE-(NMe 2 ) 2 , DPE-NMe 2 and DPE-SiH/NMe 2 ) were used to study the end-capping reactions of poly(styryl)lithium (PS-Li) for investigating the effect on end-capping of electron-donating groups in DPE structures. In situ 1 H NMR was used to measure the kinetic parameters of end-capping reactions. When the DPE derivative was held constant in the PS-Li capping reaction, the kinetic parameter (k SD ) did not change with the variance of either concentration or degree of polymerization of PS-Li. Additionally, the k SD value changed dramatically when various electronic properties of the DPE derivative substituents were modified. Electron-withdrawing groups accelerated the end-capping reaction, while electron-donating groups decelerated it. The k SD experimental values of DPE-(NMe 2 ) 2 , DPE-NMe 2 and DPE-SiH/NMe 2 were found to be 0.155 × 10 −3 , 1.26 × 10 −3 , and 6.24 × 10 −3 L 1/2 mol −1/2 s −1 , respectively. An intuitive model was established to simulate the precision of the sequence-controlled copolymerization with DPE derivatives based on investigations of end-capping kinetics. The model depicts the degree of fictitious styrene propagation for the chain insertion of one DPE derivative unit. The fictitious degrees of polymerization of styrene (FDPs) for DPE-NMe 2 and DPE-SiH/NMe 2 were calculated to be 37 and 13, respectively, suggesting that using DPE derivatives containing an electron-withdrawing group in the synthesis of sequence-controlled polymers might lead to a more precise structure.
研究领域:
高分子化学
·
材料科学
✓ 已验证
DOI
高影响因子
Nature Sustainability
·
2025
·
IF 27.1
Zhang Bo,Li Zhiguo,Han Daliang,Min Zhiwen,Cui Changjun,Wang Li,Li Qiang,Mao Xuejiao,Sun Yuanmiao,Weng Zhe,Yang Quan-Hong
The transition to clean energy necessitates the development of alternative or complementary battery chemistries to lithium-ion batteries. Aluminium (Al) metal batteries (AMBs) are a promising option owing to their high energy density and advantages in terms of abundance, recyclability, manufacturability and sustainability. However, state-of-the-art AMBs rely primarily on electrolytes featuring chloroaluminate anions such as Al 2 Cl 7 − . Unfortunately, such electrolytes create a disparity between achievable energy density and potential, in addition to having high corrosivity, high cost, high viscosity and poor transport kinetics. Here we break this paradigm by formulating an organochloro electrolyte with AlCl 3 salt in dipropyl ether (DPE) solvent. Notably, this AlCl 3 /DPE electrolyte shows no corrosion behaviour towards stainless steel current collectors during 90-day soaking. It enables stable cycling of the Al anode for over 2,000 h at 0.2 mA cm −2 and a high Coulombic efficiency of 99.85%, and prototype Al//Mo 6 S 8 full cells survive 300 cycles. Underlying these unprecedented performances is the unique organochloro solvation structure, AlCl 2 (DPE) 2 + , which is desolvatable and immobilizes free Cl − . By extending the horizon of electrolyte design into the organic domain, this work addresses the notorious issues facing AMBs and paves the way for the implementation of multivalent rechargeable batteries.
研究领域:
储能
·
电化学
·
电池技术
·
材料科学
·
可持续能源
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2019
·
IF 3.621
Lincan Yang,Li Han,Hongwei Ma,Heyu Shen,Chao Li,Songbo Zhang,Lan Lei,Xinyu Hao,Yang Li
Alkyne functional group plays a significant and versatile role in the post-polymerization modifications to prepare advanced materials. We found an inevitable side reaction, specifically a coupling reaction between poly(styryl)lithiums and alkynes protected with trimethylsilyl groups, when alkyne-contained 1,1-diphenylethylene (DPE) derivative was incorporated into a polymer chain through living anionic polymerization (LAP) method in the previous study. Herein, we redesigned the structure of alkynyl-functionalized DPE derivative by introducing more bulky protecting group ( i.e. 1-phenyl-1′-[4-[2-(triisopropylsilyl)ethynyl]phenyl]ethylene, DPE-TPSE), and found that this strategy is effective for restraining the side reaction through investigating the end-capping reaction. However, the phenomenon of multi peaks in SEC is still existed in the copolymerization with scant feeding of DPE-TPSE, which was revealed by Kinetic Monte Carlo simulation and can be attributed to excessively low cross-over of P-DPE-Li to P-St-Li for high reactivity of DPE-TPSE. Further, this unexpected phenomenon was completely eliminated by introducing another electron-donating methoxyl group into the DPE structure ( i.e. 1-(4-methyloxyphenyl)-1′-[4-[2-(triisopropylsilyl)ethynyl]phenyl]ethylene, DPE-OTPSE) and the in situ 1 H NMR method was applied to precisely analyze the kinetics and sequence for the copolymerization with DPE-OTPSE. The apparent kinetic constants for DPE-OTPSE and St ( K OTPSE and K St ) are calculated to be 4.35 × 10 -4 min −1 and 3.15 × 10 -4 min −1 , respectively, and the r St is calculated to be 0.27, which indicates the sequence of DPE-OTPSE units in chain presents gradient feature.
✓ 已验证
DOI
高影响因子
Polymer Chemistry
·
2020
·Vol. 11
·期 32
·5163-5172
·
IF 5.342
Lincan Yang,Heyu Shen,Li Han,Hongwei Ma,Chao Li,Lan Lei,Songbo Zhang,Pibo Liu,Yang Li
Synthesis of functionalized sequence-controlled polymers by utilizing 1,1-diphenylethylene (DPE) derivatives in living anionic polymerization is an effective method. Considering the capacity of sequence information and the diversity of functionalization, further progress of this method may provide a deep understanding of the copolymerization behavior of various DPE derivatives with commercial monomers. In this paper, we introduced two categories of DPE derivatives in anionic polymerization to enrich a variety of sequence-controlled polymers. The kinetics and monomer sequences of the terpolymerizations of St with two DPE derivatives through a one-step and multi-step feeding process were carefully studied. The results show that the terpolymer sequence displayed intriguing transformations by precisely controlling the reactivity difference between DPE derivatives, and facilely regulating the feed strategies of monomer pairs. The gradient, block and random distributions of two categories of DPE derivative units in the chain can be easily generated. The diversity of Tg values of these terpolymers with similar chemical compositions could prove that the various sequences have distinct effects on polymer properties.
研究领域:
高分子化学
·
材料科学
·
聚合物化学
·
阴离子聚合
·
功能高分子
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2016
·Vol. 23
·期 6
·1-8
·
IF 1.969
Li Hui,Zhang Qiuyu
In this paper, P n BA- g -PMMA brush-like and centipede multigraft copolymers were synthesized via DPE seeded emulsion polymerization and miniemulsion polymerization. PMMA macromonomers with single tail and double tails were prepared by DPE-technique in emulsion and Steglich esterification. Then P n BA- g -PMMA multigraft copolymers were obtained by miniemulsion copolymerization. The molecular weight and polydispersity indices of PMMA macromonomers and graft copolymers were characterized by GPC. The structural characteristics, weight content of PMMA and the number of grafting sites in brush-like and centipede multigraft copolymers were determined by 1 H NMR. The thermal performance of graft copolymers were analyzed by DSC and TGA. AFM confirmed microphase separation between P n BA block and PMMA block.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）