Structure of Poly(1,4-benzamide) Solutions

Panar, M.; Beste, Lawrence F.

doi:10.1021/ma60060a043

Cited by 150 publications

(42 citation statements)

References 4 publications

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“…Also the LiCl salt added to the polymer dope (to increase the solubility) stiffens the polymer chain and increases the orientation. 26 It also increases the polymer-solvent interaction and decreases the interaction between the polymer dope and the nonsolvent which further delays coagulation. All these factors favor a slow rate of coagulation resulting in very low void concentration as seen from the SEM photograph in Figure 6.…”

Section: Data Inmentioning

confidence: 99%

Synthesis, characterization, and fiber studies of certain aromatic polyamides

Balasubramanian

Nanjan

Santappa

1982

J. Appl. Polym. Sci.

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SynopsisThree aromatic polyamides containing alkyl and ether linkages in the main chain were synthesized, using low-temperature solution and interfacial polycondensation procedures, and were characterized by viscosity, solubility, UV, IR, TGA, and DSC studies. Fibers were spun using a laboratory-scale wet spinning unit and their mechanical and morphological properties studied. The results were correlated with structure and spinning conditions.

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Section: Data Inmentioning

confidence: 99%

Synthesis, characterization, and fiber studies of certain aromatic polyamides

Balasubramanian

Nanjan

Santappa

1982

J. Appl. Polym. Sci.

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“…There is evidence that in both types of solvent systems the polymer has become a polyelectrolyte (154,159). Aggregation is also evident in many instances.…”

Section: Other Poly Amino Acidsmentioning

confidence: 99%

Stiff Chain Polymer Lyotropic Liquid Crystals

Miller¹

1978

Annu. Rev. Phys. Chem.

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“…Lacquer grade NC, with a nitrogen content of about 11%, has been found to form LC structures in 13 solvents, including dimethylacetamide (DMA) [8].…”

Section: Introductionmentioning

confidence: 99%

“…In previous studies, LC structure was identified by birefringence measurements [5,8,9], and differential scanning calorimetric (DSC) measurements [9]. The aim of this work was to investigate the relationship between LC structure, as detected by birefringence and DSC, and rheological properties of pyro NC-DMA solutions which had viscosities in the range suitable for extrusion.…”

Section: Introductionmentioning

confidence: 99%

The effect of liquid crystal structure on the rheological properties of nitrocellulose-dimethylacetamide solutions

Warren¹

1984

Rheol Acta

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Abstract." Solutions of Pyro grade nitrocellulose (NC) in dimethyl acetamide (DMA), containing between 42.5% and 60% NC (w/w), have been studied by differential scanning calorimetry and polarised light microscopy. The results showed that NC forms a lyotropic liquid crystal structure in DMA. A transition from the liquid crystal phase to an isotropic phase occurred over the temperature range 27 °C to 67 °C, and the enthalpy of transition increased with NC concentration. Rheological properties were determined using an extrusion rheometer with a slit die. The solutions were shown to have a yield stress for flow which increased with increasing NC concentration. The solutions were also found to be thixotropic.

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Structure of Poly(1,4-benzamide) Solutions

Cited by 150 publications

References 4 publications

Synthesis, characterization, and fiber studies of certain aromatic polyamides

Synthesis, characterization, and fiber studies of certain aromatic polyamides

Stiff Chain Polymer Lyotropic Liquid Crystals

The effect of liquid crystal structure on the rheological properties of nitrocellulose-dimethylacetamide solutions

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