Physical state and biodegradation behavior of starch-polycaprolactone systems

Bastioli, Catia; Cerutti, Antonio; Guanella, I.; Romano, G.; Tosin, Maurizio

doi:10.1007/bf02067484

Cited by 123 publications

(72 citation statements)

References 7 publications

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“…This also explains why no more material could be found for the thermophilic samples after 30 days, since almost 2 ⁄3 of the theoretical amount of methane had been produced at that time and soon thereafter reached it's plateau value, corresponding to complete conversion. The degradation of PCL and Mater-Bi in semicontinuous activated sludge (SCAS), both mesophilic and thermophilic, demonstrated only small changes in viscosity for the samples, 19 in contrast to the molecular weights presented in Figure 3. The mesophilic samples in the study by Bastioli et al hardly displayed any changes at all, apart from the Mater-Bi samples, while the thermophilic samples show small changes.…”

Section: Biotic Environmentcontrasting

confidence: 64%

Effect of processing additives on (bio)degradability of film-blown poly(?-caprolactone)

Albertsson

Renstad

Erlandsson

et al. 1998

J. Appl. Polym. Sci.

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Poly(-caprolactone)s (PCL) with slip masterbatch, Erucamide, SiO 2 and Erucamide ϩ CaCO 3 as low-molecular-weight processing additives, were film-blown in a single screw extruder. The films and recycled PCL without additives were exposed to composting, anaerobic sewage sludge (37 and 55°C), pure fungal culture, and chemical hydrolysis at two pH (7 and 10.5) and at two temperatures (room temperature and 50°C). Recycling and addition of processing additives resulted in a slightly slower degradation rate compared with the degradation of pure PCL. The degradations in biotic environment were generally faster than in abiotic environment. Higher degradation rates are observed in more complex environments (composts and anerobic sewage sludge) due to synergism between high temperature and a richer fauna of microorganisms. In the biotic environments, faster reductions in number-average molecular weight (M n ) than in weight-average molecular weight (M w ) were observed. A decrease of M n with up to 75-80% was estimated for composted pure PCL, while similar samples in anaerobic sludge at 55°C were completely degraded in 50 days. The mechanical properties of the samples subjected to composting exhibited a more rapid enbrittlement compared to the samples subjected to abiotic hydrolysis. The observed increase in crystallinity with increasing degree of degradation is explained by crystallization made possible by chain cleavage in the amorphous phase.

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Section: Biotic Environmentcontrasting

confidence: 64%

Effect of processing additives on (bio)degradability of film-blown poly(?-caprolactone)

Albertsson

Renstad

Erlandsson

et al. 1998

J. Appl. Polym. Sci.

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show abstract

“…For example, films produced using blowing technique aresticky during processing [6]. We can overcome this difficulty by blending it with starch and CAP.…”

Section: Thermal Analysis Propertiesmentioning

confidence: 99%

“…We can overcome this difficulty by blending it with starch and CAP. The melt temperature of starch is about 230 o C [6], so it helps to overcome PCL stickiness problems during extrusion when processed at high temperatures. For PCL, the recorded values of melting temperature (T m ) were 55.7 o C, 57.8 o C, 59.9 o C. These give mean equals to 57.8 o C and a standard deviation S = 1.69.…”

Section: Thermal Analysis Propertiesmentioning

confidence: 99%

Mechanical and thermal properties of promising polymer composites for food packaging applications

Ali

2016

IOP Conf. Ser.: Mater. Sci. Eng.

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“…Founded in 1989, Novamont has developed four different classes of materials all based on blends of TPS and synthetic polymers (Bastioli, 1998). The film-grade product is based on blends of TPS and polycaprolactone (Bastioli, Cerutti, Guanella, Romano, & Tosin, 1995). This grade degrades in a composting environment in about 20-35 days (Bastioli, 1998).…”

Section: Novamontmentioning

confidence: 99%