Direct Polycondensation of Castor Oil Based Dimer Acid and Aromatic Diamines Using Triphenylphosphite

Bajpai, Anjali; Khare, Kanchan

doi:10.1081/ma-120028207

Cited by 11 publications

(5 citation statements)

References 18 publications

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“…[16][17][18] The band at 723/722/722/719 cm À1 shows the absorptions due to polymethylene groups of the dimer acid. 19 It is known that N-H and O-H absorption bands are seen at the same region, 3100-3600 cm À1 , as sharp and broad bands, respectively. 18 The sharp bands at 3297/3296/3294 cm À1 seen in the spectra of polyamides without a monofunctional reactant and with acetic and oleic acid, respectively are assigned to N-H groups that are hydrogen bonded to C O groups.…”

Section: Ft-ir Studiesmentioning

confidence: 99%

Influence of monofunctional reactants on the physical properties of dimer acid‐based polyamides

Çavuş

Gürkaynak

2006

Polymers for Advanced Techs

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Dimer acid-based polyamides were synthesized by condensation polymerization in the absence and presence of monofunctional reactants. Acetic acid, oleic acid and propyl amine were used as monofunctional reactants. The influences of the equivalent percentage (E%) and type of monofunctional reactant on the physical properties of dimer acid-based polyamides such as glass transition temperature (T g ), melting point (T m ), heat of fusion (DH), degree of polymerization (DP), number average molecular weight (M n ), and kinematic viscosity were investigated. The molecular weight and viscosity of dimer acid-based polyamides decreased with the increase in equivalent percentage of monofunctional reactant. Differential scanning calorimetry (DSC) studies showed that acetic acid and propyl amine had higher effect on the thermal properties of polyamides than that of oleic acid. In the case of polyamides prepared in the presence of acetic acid, the values of T g , T m , and DH of the polyamides increased remarkably with the increase in acetic acid content. On the contrary, propyl amine had a decreasing effect on the values of T g , T m , and DH of the polyamides. Incorporation of oleic acid into the polymer structure had no significant effect on the values of T g and T m of the dimer acid-based polyamides.

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Section: Ft-ir Studiesmentioning

confidence: 99%

Influence of monofunctional reactants on the physical properties of dimer acid‐based polyamides

Çavuş

Gürkaynak

2006

Polymers for Advanced Techs

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“…Its major constituent, recinoleic acid (12‐hydroxy‐cis‐9‐octadecenoic acid) is a hydroxyl‐containing fatty acid . Therefore, CO can be used directly as a starting material for the preparation of polyurethanes, polyesters, polyamides, epoxy resins, and alkyd resins . Owing to their significant biocompatibility, vegetable oil‐based polyurethanes found interesting applications in biomedical area such as drug delivery systems, bone tissue engineering, bioadhesives, and wound dressing …”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of novel antibacterial castor oil-based polyurethane membranes for wound dressing application

Yari

Yeganeh

Bakhshi

et al. 2013

J. Biomed. Mater. Res.

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Preparation of novel antibacterial and cytocompatible polyurethane membranes as occlusive dressing, which can provide moist and sterile environment over mild exudative wounds is considered in this work. In this regard, an epoxy-terminated polyurethane (EPU) prepolymer based on castor oil and glycidyltriethylammonium chloride (GTEAC) as a reactive bactericidal agent were synthesized. Polyurethane membranes were prepared through cocuring of EPU and different content of GTEAC with 1,4-butane diamine. The physical and mechanical properties, as well as cytocompatibility and antibacterial performance of prepared membranes were studied. Depending on their chemical formulations, the equilibrium water absorption and water vapor transmission rate values of the membranes were in ranges of 3-85% and 53-154g m(-2) day(-1), respectively. Therefore, these transparent membranes can maintain for a long period the moist environment over the wounds with low exudates. Detailed cytotoxicity analysis of samples against mouse L929 fibroblast and MCA-3D keratinocyte cells showed good level of cytocompatibility of membranes after purification via extraction of residual unreacted GTEAC moieties. The antibacterial activity of the membranes against Escherichia coli and Staphylococcus aureus bacteria was also studied. The membrane containing 50% GTEAC exhibited an effective antibacterial activity, while showed acceptable cytocompatibility and therefore, can be applied as an antibacterial occlusive wound dressing.

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“…As part of our research on sustainable materials, we aimed to improve the low-temperature, shock-resistant properties of PA11 obtained from sustainable resources such as vegetable oil. We worked on dimer acid (DA, i.e., dicarboxylic acid) derived from unsaturated fatty acids, and demonstrated its elasticity, flexibility, hydrolytic stability, hydrophobicity, low toxicity, amorphousness, and low glass transition temperature ( T g ). , Furthermore, the chemical functionalities and physical properties of the DA made it usable as a monomer for polymers or polyols, adhesives, plasticizers, and lubricants . We studied DA as a shock absorber dispersed in a PA11 matrix, and it was observed that the DA was randomly incorporated into the PA11 chain to improve the mechanical properties of PA11 .…”

Section: Introductionmentioning

confidence: 99%

Effects of Hard Segment Length on the Mechanical Properties of Poly(PA11-co-DA) Periodic Copolymers

Park

Hong

Lee³

et al. 2022

ACS Sustainable Chem. Eng.

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Polyamide 11 (PA11) is a semicrystalline polymer with excellent mechanical property. However, the use of PA11 with high crystallinity as an engineering plastic is limited because of its low impact resistance. In this work, a series of sustainable poly(PA11-co-DA) copolymers (PAx-p-DAy) were synthesized via polycondensation from vegetable oil-based dimer acid (DA) and diamine terminated polyamide 11 (ATPA11-x). The molecular structure of PAx-p-DAy was characterized by 1 H NMR, 13 C NMR, FT-IR, XRD, and viscometry. The mechanical properties of the periodic copolymers depended on the bulky DA content and the chain length of ATPA11-x. As the content of bulky DA increased and the chain length of ATPA11-x decreased, the degree of crystallinity of the PAx-p-DAy copolymers decreased, but the tensile strength, elongation, and tensile toughness increased. In addition, the low-temperature and room-temperature impact toughness of the copolymer was also remarkably improved. These thermoplastic polyamides have the potential to be widely applied.

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Direct Polycondensation of Castor Oil Based Dimer Acid and Aromatic Diamines Using Triphenylphosphite

Cited by 11 publications

References 18 publications

Influence of monofunctional reactants on the physical properties of dimer acid‐based polyamides

Influence of monofunctional reactants on the physical properties of dimer acid‐based polyamides

Preparation and characterization of novel antibacterial castor oil-based polyurethane membranes for wound dressing application

Effects of Hard Segment Length on the Mechanical Properties of Poly(PA11-co-DA) Periodic Copolymers

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