Increased glass transition temperature in motionally constrained semicrystalline polymers

Aharoni, Shaul M.

doi:10.1002/(sici)1099-1581(199803)9:3<169::aid-pat740>3.3.co;2-q

Cited by 43 publications

(66 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This rise can be attributed to the increase of the degree of crystallinity due to retrogradation, which correlates with the A : AP ratio. Increase of the degree of crystallinity in semi-crystalline polymer, interacting via hydrogen bonding, is known to increase the glass transition temperature (Jonas and Legras, 1993;Aharoni, 1998;Mano et al, 2005;Yee-Chan et al, 2007).…”

Section: Degree Of Gelatinization (Dg)mentioning

confidence: 99%

Structuring of indirectly expanded snacks based on potato ingredients: A review

Sman

Broeze

2013

Journal of Food Engineering

View full text Add to dashboard Cite

Section: Degree Of Gelatinization (Dg)mentioning

confidence: 99%

Structuring of indirectly expanded snacks based on potato ingredients: A review

Sman

Broeze

2013

Journal of Food Engineering

View full text Add to dashboard Cite

“…These are typically low molecular weight compounds able to improve processing conditions by increasing the free volume between polymer chains, thus lowering the melt viscosity or the Tg of the polymer. Consequently, they can soften the polymer and improve the flexibility and properties of the final product [26]. Commonly used plasticizers Q6 include triethyl citrate, tributyl citrate, triacetin, poly(ethylene glycol) (PEG) and poly(propylene glycol) [27].…”

Section: Polymers Used In Hmementioning

confidence: 99%

Polymeric formulations for drug release prepared by hot melt extrusion: application and characterization

Stanković

Frijlink

Hinrichs

2015

Drug Discovery Today

106

View full text Add to dashboard Cite

“…Previous studies demonstrated that a number of factors with synergic effect determine the degradation rate, including hydrophilicity, crystallinity, molecular weight, glass transition temperature and the bulk sample dimensions [35,36]. It should be pointed out that the diffusion of water into polymer matrix is a key step during degradation process.…”

Section: Mechanism Analysis Of Enzymatic Degradationmentioning

confidence: 99%

Enzymatic degradation and radiopaque attenuation of iodinated poly(ester-urethane)s with inherent radiopacity

et al. 2014

View full text Add to dashboard Cite

Biodegradable radiopaque iodinated polyurethanes (I-PUs) based on poly(e-caprolactone) diol (PCL) as soft segment have been synthesized using 4,4 0 -isopropylidene-(2,6-diiodophenol) (IBPA) as chain extender. In order to elucidate the effect of iodinated chain extender on degradation properties of I-PUs, a control polyurethane with bisphenol A as chain extender was also synthesized. The enzymatic degradation study of these I-PUs was carried out using phosphate-buffered solution (pH 7.4) at 37°C. The mass loss, surface morphology, iodine content, radiopacity, hydrophilicity and thermal properties of the samples during degradation were characterized with scanning electron microscopy (SEM), energy-dispersive X-ray detector (EDX), differential scanning calorimetry (DSC), X-ray diffraction (XRD) and static contact angle. Results of enzymatic degradation during 3 months indicated that the incorporation of iodinated chain extender greatly hindered the in vitro degradation of I-PUs compared with the control PU-C sample. The reason for the retarded degradation was attributed to the bulky iodine atoms on IBPA chain extender with steric hindrance, which decreased the surface hydrophilicity of I-PUs and slowed water/lipase diffusion rate. Moreover, the radiopacity of I-PUs does not sharply attenuate after long-time degradation, which is useful for interventional biomedical applications.

show abstract

Increased glass transition temperature in motionally constrained semicrystalline polymers

Abstract: semicrystalline polymers poly (-caprolactam) (nylon-6) and poly (ethylene terephthalate) (PET).

Cited by 43 publications

References 44 publications

Structuring of indirectly expanded snacks based on potato ingredients: A review

Structuring of indirectly expanded snacks based on potato ingredients: A review

Polymeric formulations for drug release prepared by hot melt extrusion: application and characterization

Enzymatic degradation and radiopaque attenuation of iodinated poly(ester-urethane)s with inherent radiopacity

Contact Info

Product

Resources

About