The Effect of Calcium Carbonate on the Photo‐Oxidative Behavior of Poly(butylene adipate‐<i>co</i>‐terephthalate)

Titone, Vincenzo; Mantia, Francesco Paolo La; Mistretta, Maria Chiara

doi:10.1002/mame.202000358

Cited by 17 publications

(17 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The elastic modulus increases with the weathering time for all the samples. This behaviour has been already observed in other polymer systems [ 26 , 32 , 33 , 34 ] and has been attributed to the decrease in the molecular weight due to the photo-oxidation and the consequent increase in the degree of crystallinity (see Table 2 ). The crystallinity degree increases because the lower molecular weight provokes a larger crystallisation.…”

Section: Resultssupporting

confidence: 75%

See 1 more Smart Citation

Investigation on the Properties and on the Photo-Oxidation Behaviour of Polypropylene/Fumed Silica Nanocomposites

et al. 2021

Self Cite

View full text Add to dashboard Cite

This work investigates the effects of very small amounts of fumed silica on the morphology and on the rheological and mechanical behaviour of polypropylene nanocomposites and on their photo-oxidation behaviour. Polypropylene nanocomposites were prepared using a twin-screw corotating extruder with 0, 1 and 2 wt/wt% of SiO2. Morphological, mechanical, thermomechanical and rheological properties were examined. It was found that the viscosity of the matrix is reduced by the presence of the silica nanoparticles, suggesting a poor adhesion between the two phases and probably some lubricating effect. On the contrary, the mechanical and, in particular, the thermomechanical properties of the matrix are considerably improved by the presence of the silica. In particular, elastic modulus and tensile strength increases remarkably, and this effect becomes more and more remarkable with an increasing temperature. As for the photo-oxidation behaviour, the presence of silica improves the photostability of the polypropylene matrix. This effect has been attributed to both the barrier to the oxygen and to the absorbance of the UV radiation from the silica nanoparticles. Finally, no significant effect of the silica nanoparticles has been put in evidence on the crystallisation behaviour of the polypropylene. As for the effect of the silica content, the difference in the properties of the two nanocomposites is relatively small and all the measured properties depend much less than linearly with its amount. This has been correlated with the reaggregation of the nanoparticles that, having a larger size, decrease the contact area between the matrix and the filler.

show abstract

Section: Resultssupporting

confidence: 75%

“…The degree of crystallinity (X C ) was evaluated from the melting enthalpy results (ΔH m ) of each sample using the following Equation (1) [ 26 ]:

where

is the enthalpy of fusion,

is enthalpy of fusion for 100% crystalline polymer and

is the weight fraction of polymer. For polypropylene,

= 207 J/g [ 27 ].…”

Section: Methodsmentioning

confidence: 99%

Investigation on the Properties and on the Photo-Oxidation Behaviour of Polypropylene/Fumed Silica Nanocomposites

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…On the other hand, the elastic modulus (Figure 11B) increases upon increasing the exposure time for all the samples, as has been observed in other semicrystalline polymers [55]. However, in the case of PBAT, the increase can be attributed to the formation of crosslinks of the amorphous phase that make the polymer matrix more rigid, as observed in a previous work [55]. Interestingly, the elastic modulus increase as a function of photo-oxidation time for PBAT/BC 5% and PBAT/BC 10% was clearly lower than in the case of pure PBAT films, in particular after 72 h for the composite blown film containing 10 wt% BC.…”

Section: Pbat/bc Blown-film Mechanical Propertiessupporting

confidence: 80%

Section: Pbat/bc Blown-film Mechanical Propertiessupporting

confidence: 79%

Use of Biochar as Filler for Biocomposite Blown Films: Structure-Processing-Properties Relationships

et al. 2021

Self Cite

View full text Add to dashboard Cite

In this work, biocomposite blown films based on poly(butylene adipate-co-terephthalate) (PBAT) as biopolymeric matrix and biochar (BC) as filler were successfully fabricated. The materials were subjected to a film-blowing process after being compounded in a twin-screw extruder. The preliminary investigations conducted on melt-mixed PBAT/BC composites allowed PBAT/BC 5% and PBAT/BC 10% to be identified as the most appropriate formulations to be processed via film blowing. The blown films exhibited mechanical performances adequate for possible application as film for packaging, agricultural, and compost bags. The addition of BC led to an improvement of the elastic modulus, still maintaining high values of deformation. Water contact angle measurements revealed an increase in the hydrophobic behavior of the biocomposite films compared to PBAT. Additionally, accelerated degradative tests monitored by tensile tests and spectroscopic analysis revealed that the filler induced a photo-oxidative resistance on PBAT by delaying the degradation phenomena.

show abstract

“…Although the influence of temperature was widely studied in the literature [ 14 , 15 , 16 , 17 , 18 , 19 ], the influence of relative humidity on the processing and mechanical properties is still an open field of research.…”

Section: Introductionmentioning

confidence: 99%

Effect of Moisture Content on the Processing and Mechanical Properties of a Biodegradable Polyester

Titone

Correnti²,

Mantia

2021

Polymers

Self Cite

View full text Add to dashboard Cite

This work is focused on the influence of moisture content on the processing and mechanical properties of a biodegradable polyester used for applications in injection molding. The pellets of the biodegradable polyester were exposed under different relative humidity conditions at a constant temperature before being compression molded. The compression-molded specimens were again placed under the above conditions before the mechanical testing. With all these samples, it is possible to determine the effect of moisture content on the processing and mechanical properties separately, as well as the combined effect of moisture content on the mechanical properties. The results obtained showed that the amount of absorbed water—both before processing and before mechanical testing—causes an increase in elongation at break and a slight reduction of the elastic modulus and tensile strength. These changes have been associated with possible hydrolytic degradation during the compression molding process and, in particular, with the plasticizing action of the moisture absorbed by the specimens.

show abstract

The Effect of Calcium Carbonate on the Photo‐Oxidative Behavior of Poly(butylene adipate‐co‐terephthalate)

Cited by 17 publications

References 49 publications

Investigation on the Properties and on the Photo-Oxidation Behaviour of Polypropylene/Fumed Silica Nanocomposites

Investigation on the Properties and on the Photo-Oxidation Behaviour of Polypropylene/Fumed Silica Nanocomposites

Use of Biochar as Filler for Biocomposite Blown Films: Structure-Processing-Properties Relationships

Effect of Moisture Content on the Processing and Mechanical Properties of a Biodegradable Polyester

Contact Info

Product

Resources

About