Effect of water on the relaxation spectrum of poly(methylmethacrylate)

Ceccorulli, Giuseppina; Pizzoli, Maria

doi:10.1007/s289-001-8183-9

Cited by 20 publications

(17 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Generally, PMMA bone cement showed little bit of water absorbing nature when it was placed in aqua-medium. 43 The contact angles of pure bone cement, BC-0.5, BC-1, and BC-1.5 are 81, 78.8, 76.3, and 74 , respectively, within the accuracy level of 61 . Decreasing nature of contact angle with increasing concentration of nanoLDH has shown better hydrophilicity of nanocomposites than that of pure bone cement (Fig.…”

Section: Biocompatibilitymentioning

confidence: 80%

Bone cement/layered double hydroxide nanocomposites as potential biomaterials for joint implant

Kapusetti

Misra

Singh

et al. 2012

J Biomedical Materials Res

View full text Add to dashboard Cite

Poly(methyl methacrylate)-based bone cement and layered double hydroxide (LDH) nanocomposites have been used as a grouting material for total joint arthroplasty. Few weight percentage of nanoLDH was uniformly dispersed in the bone cement matrix to have adequate interaction with matrix polymer. Mechanical strength, stiffness, toughness, and fatigue resistance of the nanocomposites are found to be higher than that of pure bone cement. Nanocomposites are thermally stable as compared to pristine bone cement. Direct mixing of the nanoLDH without any organic solvent makes these nanocomposites biocompatible. Biocompatibility was evaluated and compared with that of commercial bone cement by measuring hydrophilic nature, hemolysis assay, thrombosis assay, and deposition of apatite in simulated body fluid immersion. Finally, the viability of human osteoblast cells on the above developed nanocomposites was testified for actual biocompatibility. The experiment showed better cell growth in nanocomposites as compared to pure bone cement. Thus, these nanocomposites are found to be better grouting material than bone cement.

show abstract

Section: Biocompatibilitymentioning

confidence: 80%

Bone cement/layered double hydroxide nanocomposites as potential biomaterials for joint implant

Kapusetti

Misra

Singh

et al. 2012

J Biomedical Materials Res

View full text Add to dashboard Cite

show abstract

“…Hydrophilicity has been evaluated through contact angle measurement. In general, PMMA bone cement has little bit of water‐absorbing nature when it is placed in aqua medium 46. Bone cements prepared using benzene and DMF as solvents show the contact angle of 103 and 111°, respectively (Fig.…”

Section: Resultsmentioning

confidence: 99%

Toughening of bone cement using nanoparticle: The effect of solvent

Misra

Kapusetti

Jaiswal

et al. 2011

J of Applied Polymer Sci

View full text Add to dashboard Cite

Drawbacks of poly(methyl methacrylate) (PMMA)-based bone cement as a grouting agent for in vivo fixation of orthopedic and dental implants such as considerable low mechanical strength have been improved using nanotechnology. Bone cement-layered silicate nanocomposites have been prepared without any heat treatment in the presence of polar (dimethyl formamide, DMF) and nonpolar (benzene) solvents. Solvents have been removed completely from the bone cement after its preparation. Nanostructure is very much dependent on the solvent used for nanocomposite preparation, and benzenebased nanocomposites are highly intercalated, whereas DMF-based nanocomposites do not exhibit intercalation. Thermal stability of bone cement has improved in the presence of nanoclays. The relative enhanced interaction in case of benzene-based nanocomposites has been shown through FTIR and UV-vis studies. The significant improvement in modulus and toughness of bone cement has been demonstrated in the presence of minimum amount of nanoclay for benzene-based nanocomposites, whereas no change in modulus and reduced toughness have been observed for DMF-based nanocomposites. The decrease of contact angle has been witnessed with increasing nanoclay concentration indicating better hydrophilic materials suitable for biomedical applications for greater cell growth. The reason for varying property enhancement in different solvents has been discussed considering the polarity effect and interactions.

show abstract

“…The increase in diameter of POFs it could be explained on the basis of water in polymers acting as a plasticizer accompanied by an increase in the thermal coefficient of (volume) expansion and a reduction of T g 32, 33. Amorphous polymers including PMMA exhibit a known order of anisotropic thermal expansion.…”

Section: Resultsmentioning

confidence: 99%

“…Changes in both physical and chemical properties are common to take place in polymers as a result of water absorption 21, 24, 32, 33. Most probable physical changes that could occur in POFs are volume and refractive index changes.…”

Section: Resultsmentioning

confidence: 99%

Aging behavior of polymer optical fibers: Degradation characterization by FTIR

Appajaiah

Kretzschmar

Daum

2006

J of Applied Polymer Sci

View full text Add to dashboard Cite

The optical transmission loss behavior was investigated for commercially available poly(methyl methacrylate) (PMMA) based polymer optical fibers (POFs). POFs were exposed to various climates of temperature and humidity. Optical transmission measurements using multiplexer (a prototype device) reveal that POFs exhibited an early drop-off followed by a slow decline of transmission at 1008C with low humidity and nearly 100% loss of transmission at the early stages of exposure at 928C with 95% relative humidity (RH) and at 1208C with low humidity. Fourier transform infrared (FTIR) and gel permeation chromatography (GPC) analysis data show no significant molecular changes in the PMMA core after climatic exposures. However, the attenuated total reflection (ATR)-FTIR data shows a few molecular changes in claddings due to degradation. Scanning electron microscopy (SEM) data illustrate the shrinkage and folding structure in claddings. The loss of the optical transmission at the early (initial) stages of exposure is attributed to the physical changes (like thermal expansion), and the same at the later stages mainly to chemical changes (e.g., oxidative degradation). The experiments conducted here show that the POFs optical transmission stability is strongly dependent on the chemical composition of claddings.

show abstract

Effect of water on the relaxation spectrum of poly(methylmethacrylate)

Cited by 20 publications

References 12 publications

Bone cement/layered double hydroxide nanocomposites as potential biomaterials for joint implant

Bone cement/layered double hydroxide nanocomposites as potential biomaterials for joint implant

Toughening of bone cement using nanoparticle: The effect of solvent

Aging behavior of polymer optical fibers: Degradation characterization by FTIR

Contact Info

Product

Resources

About