Thermal analysis of high‐density polyethylene and low‐density polyethylene with enhanced biodegradability

Contat‐Rodrigo, Laura; Ribes‐Greus, A.; Imrie, Corrie T.

doi:10.1002/app.10974

Cited by 65 publications

(37 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…polystyrene and polyethylene or poly (methyl acrylate)), indicating the existence of polymer chains in CPDs. [ 42 − 44 ] The DTG curve (blue line in Figure 2c) presented the weight loss rate, and the peak in DTG curve was used to estimate the degree of thermal degradation. [ 45 ] DTG curve showed three‐stage degradation of CPDs, which was different with those classical polymers.…”

Section: Figurementioning

confidence: 99%

Deep Red Emissive Carbonized Polymer Dots with Unprecedented Narrow Full Width at Half Maximum

et al. 2020

View full text Add to dashboard Cite

The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adma.201906641. Development of high-performance carbon dots (CDs) with emission wavelength longer than 660 nm (deep red emission) is critical in deep-tissue bioimaging, yet it is still a major challenge to obtain CDs with both narrow full width at half maximum (FWHM) and high deep red/ near-infrared emission yield. Here, deep red emissive carbonized polymer dots (CPDs) with unprecedented FWHM of 20 nm are synthesized. The purified CPDs in dimethyl sulfoxide (DMSO) solution possess quantum yield (QY) as high as 59% under 413 nm excitation, as well as recorded QY of 31% under 660 nm excitation in the deep red fluorescent window. Detailed characterizations identify that CPDs have unique polymer characteristics, consisting of carbon cores and the shells of polymer chains, and π conjugated system formed with N heterocycles and aromatic rings governs the single photoluminescence (PL) center, which is responsible for high QY in deep red emissive CPDs with narrow FWHM. The CPDs exhibit strong absorption and emission in the deep red light region, low toxicity, and good biocompatibility, making them an efficient probe for both one-photon and two-photon bioimaging. CPDs are rapidly excreted via the kidney system and hepatobiliary system.

show abstract

Section: Figurementioning

confidence: 99%

Deep Red Emissive Carbonized Polymer Dots with Unprecedented Narrow Full Width at Half Maximum

et al. 2020

View full text Add to dashboard Cite

show abstract

“…To assess the potential applications of these blends, their characterization, as well as the study of their degradation process must be performed. As it has already been shown in previous works 14–17. Thermal Analysis can provide useful information about the irreversible changes in the properties of polymers caused by degradation in soil of polymeric materials.…”

Section: Introductionmentioning

confidence: 83%

Thermal characterisation of photo‐oxidized HDPE/Mater‐Bi and LDPE/Mater‐Bi blends buried in soil

Moriana

Contat‐Rodrigo

Santonja-Blasco

et al. 2008

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

Blends of high and low density polyethylene with a commercial biodegradable material (Mater-Bi) were subjected to an accelerated soil burial test. A set of samples was previously photo-oxidized to evaluate the effects of UV-irradiation on the degradation in soil process of these blends. Thermogravimetric as well as calorimetric analysis were performed to study the biodegradation, photo-degradation and their synergetic effects. Differential scanning calorimetry was carried out to analyze the morphological changes as a consequence of the photo-oxidation process. UV-irradiation slightly modifies the crystalline content of HDPE/Mater-Bi blends, increasing the heterogeneity of this blend. Criado master curves were plotted to analyses the degradation kinetic model. Broido and Coats-Redfern methods have been used for calculating the Ea of the thermal decomposition mechanisms. Thermogravimetric results reveal that noncomplexed starch is more affected by biodegradation than the polyethylene matrix and the starch/ EVOH complexes chains from Mater-Bi. However, the effects of both photo-oxidation and biodegradation processes on the thermal decomposition of Mater-Bi is influenced by the polymeric matrix used. Previous photo-oxidation finds to slow down the degradative effects caused by the soil burial test on the HDPE/Mater-Bi blends.

show abstract

“…The polyolefin degradation temperature range is broader and occurs at lower than reported values with similar heating rates and atmospheres. 18,19 The low value of the molecular weight of the polyethylene may contribute to onset and peak degradation at lower temperatures. 20 A comparison of the constant heating rate technique with the high resolution method, which employs heating rates adjustable in accordance with the rate of weight loss (Fig.…”

Section: Tga Of Componentsmentioning

confidence: 99%

Compositional analysis of thermoplastic wood composites by TGA

Renneckar

Zink-Sharp

Ward

et al. 2004

J of Applied Polymer Sci

View full text Add to dashboard Cite

A method has been developed for the quantitative determination of the composition of thermoplastic wood composites. The method involves area measurements of the two peaks in the derivative curve of a tracing produced by the thermogravimetric analysis (TGA) of a thermoplastic composites sample in an inert atmosphere. This may involve the standard, constant heating rate method or the high resolution (Hi-Res™) TGA method; both produce virtual baseline separation between wood and polyolefin peaks over a wide compositional range. Because this baseline separation suffers from a mutual effect on the thermal degradation of wood and polyolefins, best results are obtained if the parameters relating peak area with polyolefin content are different below and above 40% polyolefin content.

show abstract

Thermal analysis of high‐density polyethylene and low‐density polyethylene with enhanced biodegradability

Cited by 65 publications

References 26 publications

Deep Red Emissive Carbonized Polymer Dots with Unprecedented Narrow Full Width at Half Maximum

Deep Red Emissive Carbonized Polymer Dots with Unprecedented Narrow Full Width at Half Maximum

Thermal characterisation of photo‐oxidized HDPE/Mater‐Bi and LDPE/Mater‐Bi blends buried in soil

Compositional analysis of thermoplastic wood composites by TGA

Contact Info

Product

Resources

About