Strengthening blends of poly(lactic acid) and starch with methylenediphenyl diisocyanate

Wang, Hua; Sun, Xiuzhi Susan; Seib, Paul A.

doi:10.1002/app.2018

Cited by 254 publications

(169 citation statements)

References 25 publications

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“…c is the degree of crystallinity; !H m is the heat of fusion of the sample; !H f corresponds to the heat of fusion for 100% crystalline material, and w PLA is the net weight fraction of the PLA. The heat of fusion of 100% crystalline PLA ("H f ) is approximately 93.6 J/g [19].…”

Section: Transmission Electron Microscopy (Tem)mentioning

confidence: 99%

Effects of SEBS-g-MAH on the properties of injection moulded poly(lactic acid)/nano-calcium carbonate composites

Chow¹,

Leu²,

Ishak³

2012

Express Polym. Lett.

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Poly(lactic acid)/nano-precipitated calcium carbonate (PLA/NPCC) composites toughened with maleated styrene-ethylene/butylene-styrene (SEBS-g-MAH) were prepared by melt-compounding on a co-rotating twin-screw extruder followed by injection moulding. The mechanical properties of the PLA nanocomposites were characterized by tensile, flexural and impact tests, while their morphology were investigated using transmission electron microscopy (TEM). The thermal properties of the composites were examined with differential scanning calorimeter (DSC) and thermogravimetric analyzer (TGA). The elongation at break and impact strength of the PLA/NPCC nanocomposites increased significantly after addition of SEBS-g-MAH. Both nano-dispersed NPCC and small NPCC clusters were found in PLA matrix. Also, some SEBS-g-MAH encapsulated NPCC can be observed. Thermal stability of PLA/NPCC was enhanced prominently by the addition of SEBS-g-MAH

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Section: Transmission Electron Microscopy (Tem)mentioning

confidence: 99%

Effects of SEBS-g-MAH on the properties of injection moulded poly(lactic acid)/nano-calcium carbonate composites

Chow¹,

Leu²,

Ishak³

2012

Express Polym. Lett.

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“…It serves as a continuous matrix component in plant cell walls, providing mechanical strength and structural support (Wang et al 2001;El-Wakil 2009;Yu et al 2010;Ouyang et al 2012). Lignin and derivatives chemistry is applicable for use in composites because they have small particle size, are hydrophobic, and can form chemical connections with other materials.…”

Section: Introductionmentioning

confidence: 99%

“…It is well known that the mechanical properties of composites are closely related to the interfacial connection between the filler and the matrix (Yu et al 2010) and that interfacial adhesion can be improved by adding a reactive compatibilizer or coupling agent (Wang et al 2001;El-Wakil 2009). Silane coupling agents such as 3-aminopropyltriethoxysilane (KH550), γ-glycidoxypropyltrimethoxysilane (KH560), and g-methacryloxypropyltrimethoxysilane (KH570) have been widely used (Pilla et al 2008;Pilla et al 2009;Chen et al 2010;Wang et al 2011;Zhong et al 2011;Yu et al 2012) and have also been applied in PLA and inorganic composites (Rakmae et al 2012) with natural fillers, such as coconut shell powder (Chun et al 2012), kenaf fiber (Huda et al 2008), cellulose fiber (Frone et al 2011), and wood flour (Pilla et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Modification of Lignin with Silane Coupling Agent to Improve the Interface of Poly(L-lactic) Acid/Lignin Composites

Zhu¹,

Xue²,

Wei³

et al. 2015

BioResources

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To improve the mechanical properties of lignin-filled poly(L-lactic) composites, three silane coupling agents, 3-aminopropyltriethoxysilane (KH550), γ-glycidoxypropyltrimethoxysilane (KH560), and g-methyacryloxypropyltrimethoxysilane (KH570), were treated systematically with different solvents to modify the interfacial connections. The treatment of lignin with 2 wt.% aqueous KH550 solution was proved to be the most successful. Chemical bonding between the filler and the matrix was formed, according to the FTIR spectra. Furthermore, scanning electron microscope images showed that such treated lignin particles dispersed well in the composites. The tensile strength and Young's modulus of the composite improved significantly from 55.1 and 1589 MPa to 67.0 and 1641 MPa, respectively, with 5 wt.% treated lignin addition. Although its elongation at break decreased from 20.3 to 12.4% after 5 wt.% of the treated lignin was added, it was still better than that of poly(L-lactic acid) without any additive (10.3%).

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“…Pure PLA can degrade to carbon dioxide, water, and methane in the environment over a period of several months to two years, compared to other petroleum plastics needing very longer periods [10] [11]. On the other hand, it is well known that the fiber reinforcement is a viable method to improve the material properties of biodegradable polymers and to reduce the overall costs of the prepared materials [12].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Raw and Chemically Modified Sponge-Gourd Fiber Reinforced Polylactic Acid Biocomposites

Al-Mobarak¹,

Gafur²,

Mina³

2018

MSA

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This research work has been undertaken to fabricate environmentally friendly biocomposites for biomedical and household applications. Sponge-gourd fibers (SGF) obtained from Luffa cylindrica plant were chemically treated separately using 5 and 10 wt% NaOH, acetic anhydride and benzoyl chloride solutions. SGF reinforced polylactic acid (PLA) biocomposites were fabricated using melt compounding technique. Surface morphological, structural, mechanical and thermal properties, as well as antibacterial activities of raw and chemically modified SGF reinforced PLA (SGF-PLA) composites were characterized by field emission scanning electron microscopy, Fourier transform infrared spectrometry, X-ray diffractometry, universal testing method, thermogravimetry, and Kirby-Bauer agar diffusion method, respectively. Surface morphology indicates that after treatment of fibers, the interfacial adhesion between PLA and fibers is improved. X-ray diffractometry result shows that chemical treatment of fibers improves the crystallinity and exhibits new chemical bond formation in the composites. After chemical treatment, compressive strength of the composites is found to increase by 10% -35%. The thermal stability of the treated fiber reinforced composites is also found to increase significantly. The composites have no antibacterial activities and no cytotoxic effect on non-cancer cell line. Soil burial test has confirmed that the composites are biodegradable. Benzoyl chloride treatment of fibers shows superior mechanical properties and enhances thermal stability among the composites.

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Strengthening blends of poly(lactic acid) and starch with methylenediphenyl diisocyanate

Cited by 254 publications

References 25 publications

Effects of SEBS-g-MAH on the properties of injection moulded poly(lactic acid)/nano-calcium carbonate composites

Effects of SEBS-g-MAH on the properties of injection moulded poly(lactic acid)/nano-calcium carbonate composites

Modification of Lignin with Silane Coupling Agent to Improve the Interface of Poly(L-lactic) Acid/Lignin Composites

Preparation and Characterization of Raw and Chemically Modified Sponge-Gourd Fiber Reinforced Polylactic Acid Biocomposites

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