Susceptibility to Degradation in Soil of Branched Polyesterurethane Blends with Polylactide and Starch

The new segmented poly(thiourethane-urethane)s (PTURs) based on 1,1′-methanediylbis(4-isocyanatocyclohexane) (HMDI, Desmodur W®), polycarbonate diol (PCD, Desmophen C2200) and (methanediyldibenzene-4,1-diyl)dimethanethiol were synthesized by one-step melt polyaddition method. The obtained PTURs, with a content of 30–60 wt% of the hard segments (HS), were tested in which the influence of changes in the HS content on their properties was determined. The polymers were characterized by Fourier transform infrared spectroscopy (FTIR), gel permeation chromatography (GPC), thermal analysis (DSC, TGA) and thermomechanical analysis (DMTA). Additionally, tensile strength, optical (refractive index, UV-VIS and color) and surface properties of the obtained polymers (contact angle and surface free energy) and adhesion to copper were examined. FTIR analysis verified the supposed structure of the polymers obtained and showed a complete conversion of the isocyanate groups. TGA analysis confirmed the relatively good thermal stability of the polymers. On the other hand, after performing the DSC analysis, it was possible to state that the obtained materials were partially or completely amorphous, and the microphase separation decreased with increasing HS content in the polymer. Similar observations were made from the DMTA data. In addition, the hardness, tensile strength, modulus of elasticity, storage modulus, adhesion to copper, refractive index and total free surface energy increased with increasing HS content in the polymer.

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“…[ 5 ]. The PUs can also form suitable blends [ 14 , 15 , 16 , 17 , 18 ] or composites [ 19 , 20 , 21 , 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of New Polycarbonate-Based Poly(thiourethane-urethane)s

Puszka

Sikora

2022

Polymers

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“…Partial biodegradation of the PLA granules was observed which was due to microbial action rather than physical discharge (Shogren et al 2003 ). The presence of the cracks and holes confirmed the biodegradation process (Brzeska et al 2022 ). A greater number of cracks was observed on the biocomposites with higher rates of biodegradation (i.e.…”

Section: Resultsmentioning

confidence: 56%

Synthesis of a new biocomposite for fertiliser coating: assessment of biodegradability and thermal stability

Ketabchi

Soltani

Chan

2023

Environ Sci Pollut Res

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The bio- and thermal degradation as well as the water absorption properties of a novel biocomposite comprising cellulose nanoparticles, natural rubber and polylactic acid have been investigated. The biodegradation process was studied through an assembled condition based on the soil collected from the central Malaysian palm oil forests located in the University of Nottingham Malaysia. The effects of the presence of the cellulose nanoparticles and natural rubber on the biodegradation of polylactic acid were investigated. The biodegradation process was studied via thermal gravimetric analysis and scanning electron microscopy. It was understood that the reinforcement of polylactic acid with cellulose nanoparticles and natural rubber increases the thermal stability by ~ 20 °C. Limited amorphous regions on the surface of the cellulose nanoparticles accelerated the biodegradation and water absorption processes. Based on the obtained results, it is predicted that complete biodegradation of the synthesised biocomposites can take place in 3062 h, highlighting promising agricultural applications for this biocomposite.

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“…Partial biodegradation of the PLA granules was observed which was due to microbial action rather than physical discharge [Shogren et al 2003]. The presence of the cracks and holes con rmed the biodegradation process [Brzeska et al 2022]. A greater number of cracks was observed on the biocomposites with higher rates of biodegradation (i.e.…”

Section: Morphological Analysesmentioning

confidence: 99%

Synthesis of a New Biocomposite for Fertiliser Coating: Assessment of Biodegradabilityand Thermal Stability

Ketabchi

Soltani

Chan

2023

Preprint

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The bio- and thermal degradation as well as the water absorption properties of a novel biocomposite comprising cellulose nanoparticles, natural rubber and polylactic acid have been investigated. The biodegradation process was studied through an assembled condition based on the soil collected from the central Malaysian palm oil forests located in the University of Nottingham Malaysia. The effects of the presence of the cellulose nanoparticles and natural rubber on the biodegradation of polylactic acid were investigated. The biodegradation process was studied via thermal gravimetric analysis (TGA) and scanning electron microscopy (SEM). It was understood that the reinforcement of polylactic acid with cellulose nanoparticles and natural rubber increases the thermal stability by ~20 °C. Limited amorphous regions on the surface of the cellulose nanoparticles accelerated the biodegradation and water absorption processes. Based on the obtained results, it is predicted that complete biodegradation of the synthesised biocomposites can take place in 3062 h, highlighting promising agricultural applications for this biocomposite.

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Susceptibility to Degradation in Soil of Branched Polyesterurethane Blends with Polylactide and Starch

Cited by 3 publications

References 42 publications

Synthesis and Characterization of New Polycarbonate-Based Poly(thiourethane-urethane)s

Synthesis and Characterization of New Polycarbonate-Based Poly(thiourethane-urethane)s

Synthesis of a new biocomposite for fertiliser coating: assessment of biodegradability and thermal stability

Synthesis of a New Biocomposite for Fertiliser Coating: Assessment of Biodegradabilityand Thermal Stability

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