Miscibility studies on blends of cellulose acetate and nylon 6

Shashidhara, G. M.; Guruprasad, K. H.; Varadarajulu, A.

doi:10.1016/s0014-3057(01)00215-4

Cited by 27 publications

(9 citation statements)

References 13 publications

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“…46 Existence of miscibility window for blends of polymer with polymer/ copolymer has been observed by several research groups. [47][48] Each sample was evaluated for three times. The mean values and corresponding standard deviation is displayed Scaffold wettability is known to be critical for biodegradation and biocompatibility for the aforementioned applications.…”

Section: Physico-chemical Properties Of the Membranementioning

confidence: 99%

In Situ Generation of Cellulose Nanocrystals in Polycaprolactone Nanofibers: Effects on Crystallinity, Mechanical Strength, Biocompatibility, and Biomimetic Mineralization

Joshi

Tiwari

Pant³

et al. 2015

ACS Appl. Mater. Interfaces

139

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Post-electrospinning treatment is a facile process to improve the properties of electrospun nanofibers for various applications. This technique is commonly used when direct electrospinning is not a suitable option to fabricate a nonwoven membrane of the desired polymer in a preferred morphology. In this study, a representative natural-synthetic hybrid of cellulose acetate (CA) and polycaprolactone (PCL) in different ratios was fabricated using an electrospinning process, and CA in the hybrid fiber was transformed into cellulose (CL) by post-electrospinning treatment via alkaline saponification. Scanning electron microscopy was employed to study the effects of polymer composition and subsequent saponification on the morphology of the nanofibers. Increasing the PCL content in the PCL/CA blend solution caused a gradual decrease in viscosity, resulting in smoother and more uniform fibers. The saponification of fibers lead to pronounced changes in the physicochemical properties. The crystallinity of the PCL in the composite fiber was varied according to the composition of the component polymers. The water contact angle was considerably decreased (from 124° to less than 20°), and the mechanical properties were greatly enhanced (Young's Modulus was improved by ≈20-30 fold, tensile strength by 3-4 fold, and tensile stress by ≈2-4 fold) compared to those of PCL and PCL/CA membranes. Regeneration of cellulose chains in the nanofibers increased the number of hydroxyl groups, which increased the hydrogen bonding, thereby improving the mechanical properties and wettability of the composite nanofibers. The improved wettability and presence of surface functional groups enhanced the ability to nucleate bioactive calcium phosphate crystals throughout the matrix when exposed to a simulated body fluid solution. Experimental results of cell viability assay, confocal microscopy, and scanning electron microscopy imaging showed that the fabricated nanofibrous membranes have excellent ability for MC3T3-E1 cell proliferation and growth. Given the versatility and widespread use of cellulose-synthetic hybrid systems in the construction of tissue-engineered scaffolds, this work provides a novel strategy to fabricate the biopolymer-based materials for applications in tissue engineering and regenerative medicine.

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Section: Physico-chemical Properties Of the Membranementioning

confidence: 99%

In Situ Generation of Cellulose Nanocrystals in Polycaprolactone Nanofibers: Effects on Crystallinity, Mechanical Strength, Biocompatibility, and Biomimetic Mineralization

Joshi

Tiwari

Pant³

et al. 2015

ACS Appl. Mater. Interfaces

139

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“…Miscibility and properties of cellulose acetate and nylon 6 blends has been investigated by Shashidhara and his group using viscometry method. 10 In this present work, we focus on polymer-polymer interaction of cellulose acetate (CA) and polyacrylonitrile (PAN) resulting from the viscosities of blend solutions using dimethylformamide (DMF) as a cosolvent. The obtained viscosity data are compared with DSC results and microscopy photographs.…”

Section: Introductionmentioning

confidence: 99%

Investigation on polyacrylonitrile/cellulose acetate blends

Barani

Bahrami

2007

Macromol. Res.

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The molecular interactions of polyacrylonitrile (PAN) and cellulose acetate (CA) were investigated thoroughly via dilute solution viscometry in dimethylformamide (DMF) as a common solvent at 30 o C. The intrinsic viscosities and viscometric interaction parameters were experimentally determined for both binary (polymer/ dimethylformamide) and ternary (PAN/CA/dimethylformamide) systems. As all investigated PAN/CA ternaries evidenced negative viscometric interaction parameter values (Δb & Δk < 0), the existence of repulsive intermolecular interactions was deduced, and PAN/CA blends were assigned as immiscible. Moreover, the results of microscopy photograph analysis indicated that pure PAN film evidences a homophasic structure, and the size of the phase domain increases gradually with increases in CA. In DSC analysis, it was determined that the glass transition temperature of the blend film increased slightly with increases in the CA content of the blend film.

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“…There are several studies on predicting the solid state compatibility by obtaining solution state compatibility with viscometric and thermal techniques [10,12,25–28]. In this study, EPDM rubber was added to IIR in different ratios and compatibility of two polymers was analyzed by viscometric technique.…”

Section: Introductionmentioning

confidence: 99%

The effects of compatibility on the mechanical properties and fatigue resistance of butyl/EPDM rubber blends

2010

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In this study, compatibility of butyl/ethylene‐propylene‐diene rubbers in different ratios was investigated byviscometric technique. For evaluating polymer compatibility, the parameters Δb suggested by Krigbaum&Wall, ΔB and μ that were suggested by Chee were calculated. Data obtained from viscometric study were used for preparing new compound recipe. Mechanical and rheological properties of the new compounds were measured and the changes in the properties before and after thermal aging were determined. Replacement of ethylene‐propylene‐diene rubber with butyl rubber in appropriate ratio improved the fatigue resistance of the vulcanizates. Improvement of dynamic mechanical properties of polymer blends is expected only in the case of blending compatible polymers in appropriate ratios. The compatibility of blends in different ratios has been studied by viscometric technique and mechanical measurements and obtained very similar results. It has been concluded that viscometric determination of butyl/ethylene‐propylene‐diene rubbers compatibility could be used as a simple technique for predicting the mechanical properties of the same rubber blend that was related with solid phase compatibility. POLYM. COMPOS., 31:1869–1873, 2010. © 2010 Society of Plastics Engineers.

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Miscibility studies on blends of cellulose acetate and nylon 6

Cited by 27 publications

References 13 publications

In Situ Generation of Cellulose Nanocrystals in Polycaprolactone Nanofibers: Effects on Crystallinity, Mechanical Strength, Biocompatibility, and Biomimetic Mineralization

In Situ Generation of Cellulose Nanocrystals in Polycaprolactone Nanofibers: Effects on Crystallinity, Mechanical Strength, Biocompatibility, and Biomimetic Mineralization

Investigation on polyacrylonitrile/cellulose acetate blends

The effects of compatibility on the mechanical properties and fatigue resistance of butyl/EPDM rubber blends

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