Physical and Mechanical Properties of Poly(Butylene Succinate) and Poly(Lactic Acid) under Landfill Conditions

2020 ◽  
Vol 856 ◽  
pp. 245-252
Author(s):  
Narumon Seeponkai ◽  
Krisana Poolsawat
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Physical And Mechanical Properties ◽  
Degradation Process ◽  
Chain Scission ◽  
Poly Lactic Acid ◽  
Ester Bond ◽  
Butylene Succinate ◽  
Erosion Mechanism ◽  
Scanning Electron

In this study, the disintegration of poly(butylene succinate)(PBS) and poly(lactic acid) (PLA) under landfill conditions was investigated. Both polymers were melted, injected into a dumbbell-shape, and buried under the soil for 20 weeks. The morphology of the polymer from the scanning electron microscope (SEM) revealed that, after 6 weeks of the burial, the PBS polymer produced many micro-voids in the bulk of polymer. The amount of the voids increased with time. While the morphology of PLA showed a few voids and some cracks during the degradation process. Moreover, the mechanical properties of the PLA were decreased after 2 weeks following with PBS after 4 weeks of the burial times. The weight loss and the water uptake of PBS and PLA were slightly increased. From the result, it was found that the degradation of PBS and PLA proceeds via random chain scission of the ester bond through bulk erosion mechanism. The degradation of PLA degraded faster than the PBS due to the low crystallinity in the polymer chain. This result can be applied to the design waste management of biodegradable polymer products.

scholarly journals Poly(Lactic Acid)–Poly(Butylene Succinate)–Sugar Beet Pulp Composites; Part I: Mechanics of Composites with Fine and Coarse Sugar Beet Pulp Particles

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2531
Author(s):  
Rodion Kopitzky
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Sugar Beet ◽  
Cell Structure ◽  
Sugar Beet Pulp ◽  
Poly Lactic Acid ◽  
Butylene Succinate ◽  
Fracture Patterns ◽  
Beet Pulp ◽  
The Impact

Sugar beet pulp (SBP) is a residue available in large quantities from the sugar industry, and can serve as a cost-effective bio-based and biodegradable filler for fully bio-based compounds based on bio-based polyesters. The heterogeneous cell structure of sugar beet suggests that the processing of SBP can affect the properties of the composite. An “Ultra-Rotor” type air turbulence mill was used to produce SBP particles of different sizes. These particles were processed in a twin-screw extruder with poly(lactic acid) (PLA) and poly(butylene succinate) (PBS) and fillers to granules for possible marketable formulations. Different screw designs, compatibilizers and the use of glycerol as a thermoplasticization agent for SBP were also tested. The spherical, cubic, or ellipsoidal-like shaped particles of SBP are not suitable for usage as a fiber-like reinforcement. In addition, the fineness of ground SBP affects the mechanical properties because (i) a high proportion of polar surfaces leads to poor compatibility, and (ii) due to the inner structure of the particulate matter, the strength of the composite is limited to the cohesive strength of compressed sugar-cell compartments of the SBP. The compatibilization of the polymer–matrix–particle interface can be achieved by using compatibilizers of different types. Scanning electron microscopy (SEM) fracture patterns show that the compatibilization can lead to both well-bonded particles and cohesive fracture patterns in the matrix. Nevertheless, the mechanical properties are limited by the impact and elongation behavior. Therefore, the applications of SBP-based composites must be well considered.

Short Review: Potential Production of Acacia Wood and its Biocomposites

2018 ◽  
Vol 917 ◽  
pp. 37-41 ◽  
Author(s):  
Muhammad Khusairy bin Bakri ◽  
Elammaran Jayamani ◽  
Soon Kok Heng ◽  
Akshay Kakar
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Review Paper ◽  
Natural Fiber ◽  
Physical And Mechanical Properties ◽  
Short Review ◽  
Fiber Composites ◽  
Poly Lactic Acid ◽  
Hybrid Polymer ◽  
Potential Production

In this short review paper, the physical and mechanical properties of acacia wood, poly lactic acid (PLA) and polyhydroxyalkanoates (PHA) were analyzed. Existing factors that affect the mechanical properties of natural fiber composites were investigated and identified. By knowing these factors, a possibility and potentiality in implementing the natural acacia wood reinforced material with hybrid polymer were discussed. It was found that the acacia wood had the potential to re-condition soil and have the potential to become reinforced materials in hybrid polymer composites. In addition, using fully biodegradable polymer such as PLA and PHA made it sustainable and environmentally friendly.

Base-Catalyzed Hydrolysis Behavior of PLA/PBS Blends

2013 ◽  
Vol 821-822 ◽  
pp. 941-944
Author(s):  
Shi Jie Zhang ◽  
Yi Wen Tang ◽  
Li Hua Cheng
Keyword(s):  
Molecular Weight ◽  
Lactic Acid ◽  
Degradation Rate ◽  
Degradation Process ◽  
Poly Lactic Acid ◽  
Biodegradable Materials ◽  
Butylene Succinate ◽  
New Type

Poly (butylene succinate) (PBS) was mixed with Poly (lactic acid) (PLA) through Haake Reomix, a new type of biodegradable materials can be obtained. With the increasing addition of PBS and the raise of the solution basicity, the degradation rate of blends increase sharply. The GPC analysis can approve the reduction of molecular weight in the degradation process of PLA/PBS blends.

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