Introduction of a reliable method for determination of intrinsic viscosity for any polymer with high precision

Xiong, Xiaopeng; Ke, Qirong; Zhu, Shiqin

doi:10.1007/s10118-014-1388-y

Cited by 7 publications

(5 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This method, also working for uncharged and non-linear macromolecules, is being increasingly used. [3][4][5][6] In the present communication, we apply the above mentioned alternative approach to a further class of polyelectrolytes, namely to cationic copolymers of acrylamide (AM) and diallyldimethylammonium chloride (DADMAC), varying the content of DADMAC, i.e. changing their degree of charging.…”

Section: Introductionmentioning

confidence: 99%

Polyelectrolytes in dilute solution: viscometric access to coil dimensions and salt effects

2015

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Polyelectrolytes in dilute solution: viscometric access to coil dimensions and salt effects

2015

View full text Add to dashboard Cite

show abstract

“…When ammonia and HBPEI are added to the CMC aqueous solution, The viscosity of the CMC-NH 3 -HBPEI solution increased sharply and began to stabilize around 5 h. The phenomenon might be due to the presence of NH 4 + in the solution, which can neutralize the COO − of CMC, reducing the dispersion of CMC in the aqueous solution and making it easier to form an aggregated state, thus increasing the viscosity substantially. The high viscosity of the binder solution facilitates the slowing down of precipitation and agglomeration of suspended particles, thus improving the stability of the electrode slurry [27][28][29].…”

Section: Resultsmentioning

confidence: 99%

Hybrid Ionically Covalently Cross-Linked Network Binder for High-Performance Silicon Anodes in Lithium-Ion Batteries

Zeng

Yue

et al. 2023

Batteries

View full text Add to dashboard Cite

Silicon has gained considerable attention as an anode material in lithium-ion batteries due to its high theoretical capacity. However, the significant volume changes that occur during lithiation/delithiation processes often result in poor cycling stability of silicon anodes. In this study, a hybrid ionically covalently cross-linked network binder carboxymethylcellulose-hyperbranched polyethyleneimine (CMC-HBPEI) is successfully constructed by “switching” ionic bonds and partially “converting” them to covalent bonds to buffer the volume variation of silicon anodes. In this hybrid cross-linked network, the covalently cross-linked network is responsible for maintaining the structural integrity of the anode, while the ionically cross-linked network utilizes the bonding reversibility to sustainably dissipative the mechanical stress and self-heal the structural breakages generated from the lithiation expansion of silicon. By changing the drying temperature of the anode, the ratio of covalent and ionic bonds in the hybrid cross-linked network can be adjusted to balance the mechanical stability and bonding reversibility of the CMC-HBPEI binder. Even after 300 cycles of charging/discharging under a current density of 500 mAg−1, the specific capacity of the optimized Si/CMC-HBPEI anode remains at 1545 mAhg−1.

show abstract

“…The relative viscosity (Equation ) was determined from the ratio between the flow time of the polymer solutions ( t ) and the flow time of pure solvent ( t 0 ) 16–18 . The intrinsic viscosity was determined by Equation ().…”

Section: Methodsmentioning

confidence: 99%

Synthesis and characterization of a novel rigid rod polymer based on 2,6‐dihydroxyterephthalic acid and 2,3,5,6‐tetraminopyridine

Wang

Deng

Jia

2021

J of Applied Polymer Sci

View full text Add to dashboard Cite

Poly‐p‐phenyleneterephthalamide (PPTA) is widely used in national defense, military industry, and aerospace. However, with weak compression resistance and twist resistance, development of PPTA is greatly impeded. In this work, a novel rigid rod polymer was synthesized by polycondensation of 2,6‐dihydroxyterephthalic acid with 2,3,5,6‐tetraminopyridine which have a large quantity of hydrogen bonds between these polymer chains which provide excellent thermal properties named poly [N‐(2,5‐diamino‐6‐[imino]‐3‐pyridyl)‐4‐formyl‐2,6‐dihydroxybenzamide] (PPDA). The structure of the polymers was characterized by X‐ray diffraction and Fourier transform infrared spectroscopy. The resulting showed that PPDA has good thermal stability and crystallinity, the maximum thermal decomposition temperature close to 900°C under the nitrogen atmosphere. At the same time, PPDA was insoluble in most organic solvents and exhibited good chemical stability. This indicated a superior performance over that of the poly(2,6‐diimidazo(4,5‐b:4′5′‐e)pyridinylene‐1,4(2,5‐dihydroxy)phenylene). In addition, we can foresee that PPDA will play an important role in prospective surgery and aramid areas.

show abstract

Introduction of a reliable method for determination of intrinsic viscosity for any polymer with high precision

Cited by 7 publications

References 24 publications

Polyelectrolytes in dilute solution: viscometric access to coil dimensions and salt effects

Polyelectrolytes in dilute solution: viscometric access to coil dimensions and salt effects

Hybrid Ionically Covalently Cross-Linked Network Binder for High-Performance Silicon Anodes in Lithium-Ion Batteries

Synthesis and characterization of a novel rigid rod polymer based on 2,6‐dihydroxyterephthalic acid and 2,3,5,6‐tetraminopyridine

Contact Info

Product

Resources

About