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JournalISSN: 0170-0839

Polymer Bulletin 

Springer Science+Business Media
About: Polymer Bulletin is an academic journal published by Springer Science+Business Media. The journal publishes majorly in the area(s): Polymerization & Polymer. It has an ISSN identifier of 0170-0839. Over the lifetime, 10458 publications have been published receiving 129346 citations.


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Journal ArticleDOI
TL;DR: In this article, the authors studied the electrical conductivity of carbon black (CB) filled polymer blends and found that CB distribution is unevenly distributed in each component of the polymer blend, and that the filler distribution concentrates at interface of two polymers.
Abstract: Dispersion state of carbon black(CB) was studied in polymer blends which are incompatible with each other. It was found that CB distributes unevenly in each component of the polymer blend. There are two types of distribution. (1) One is almost predominantly distributed in one phase of the blend matrix, and in this phase fillers are relatively homogeneously distributed in the same manner as a single polymer composite. (2) In the second, the filler distribution concentrates at interface of two polymers. As long as the viscosities of two polymers are comparable, interfacial energy is the main factor determining uneven distribution of fillers in polymer blend matrices. This heterogeneous dispersion of conductive fillers has much effect on the electrical conductivity of CB filled polymer blends. The electrical conductivity of CB filled polymer blends is determined by two factors. One is concentration of CB in the filler rich phase and the other is phase continuity of this phase. These double percolations affect conductivity of conductive particle filled polymer blends.

921 citations

Journal ArticleDOI
TL;DR: In this paper, the conductivite ionique de sels de lithium dissous dans du polyoxyde d'ethylene, diminue par stockage, a temperature ambiante.
Abstract: La conductivite ionique de sels de lithium dissous dans du polyoxyde d'ethylene, diminue par stockage, a temperature ambiante. Ceci est du a une cristallisation qui peut etre inhibee par addition de caoutchouc nitrile et d'un macromere de polyoxyde d'ethylene

668 citations

Journal ArticleDOI
TL;DR: In this article, the degree of deacetylation of chitosan by 1H NMR spectroscopy was determined by using 2 wt% CD3COOD/D2O solvents.
Abstract: This paper describes a novel method to determine the degree of deacetylation of chitosan by 1H NMR spectroscopy. Measurements were carried out at 70°C by using 2 wt% CD3COOD/D2O and 2 wt% DC1/D2O as solvents for chitosan. In the case of DC1/D2O system, effect on hydrolysis of chitosan should be taken into consideration, and the pulse repetition delay required for 45° pulse is 40s. Whereas, in regard to CD3COOD/D2O system, 6s pulse repetition delay is enough for 45° pulse, and moreover, high magnetic field NMR apparatus is necessary, because signal of CD2H residue in CD3COOD overlaps with that of CH3 residue in N-acetyl residue and determination of the difference of two spectra is required. The proposed method is more effective, precise and simple, comparing with the conventional colloid titration and elemental analysis methods. Assignments of 1H and 13C NMR spectra of chitosan are also reported.

655 citations

Journal ArticleDOI
TL;DR: In this paper, a method was developed to stop the crosslinking reaction of a polydimethylsiloxane system without disturbing the state of the sample, and the loss modulus and the storage modulus were found to be identical over several decades of frequency and for temperatures ranging between -50°C and +180°C.
Abstract: A method has been developed to stop the crosslinking reaction of a polydimethylsiloxane system without disturbing the state of the sample. Oscillatory shear experiments on samples just before and just beyond the gelation point demonstrated the transition of the material from a viscoelastic liquid to a viscoelastic solid. At the gel point the loss modulus and the storage modulus were found to be identical over several decades of frequency and for temperatures ranging between -50°C and +180°C. Both moduli were proportional to the square root of the frequency.

392 citations

Journal ArticleDOI
TL;DR: In this paper, the authors synthesize polysquaraines and polycroconaines with a small band gap, down to 0.5 eV. The small gap arises from the regular alternation of strong donor and acceptor-like moieties in a conjugated backbone.
Abstract: Polysquaraines and polycroconaines have been synthesized. They form a new class of polymers with a small band gap, down to 0.5 eV. The small gap arises from the regular alternation of strong donor and acceptor-like moieties in a conjugated backbone.

365 citations

Performance
Metrics
No. of papers from the Journal in previous years
YearPapers
2023243
2022673
2021849
2020378
2019358
2018334