The influence of matrix crystallinity, filler grain size and modification on properties of PLA/calcium carbonate composites

Piekarska, Klaudia; Piórkowska, Ewa; Bojda, Joanna

doi:10.1016/j.polymertesting.2017.06.025

Cited by 40 publications

(20 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This phenomenon could be attributed to the SA, which decreasing the thermal stability of Ti 3 C 2 T x . However, the weight loss temperatures of T onset well exceed 250 °C, which evidencing the Ti 3 C 2 T x ‐g‐ SA/PLA composites have good stability in the processing temperature range of the PLA . Furthermore, the thermal stability of Ti 3 C 2 T x ‐g‐ SA/PLA composites is close to unchanged when containing low loading of Ti 3 C 2 T x ‐g‐ SA (2 wt % is the largest), indicating the composites have good practicability in the low loading range of Ti 3 C 2 T x ‐g‐ SA.…”

Section: Resultsmentioning

confidence: 91%

Enhanced mechanical properties of poly(lactic acid) composites with ultrathin nanosheets of MXene modified by stearic acid

Yang

Liu

et al. 2019

J of Applied Polymer Sci

View full text Add to dashboard Cite

MXene modified by stearic acid (Ti 3 C 2 T x -g-SA) is incorporated into poly(lactic acid) (PLA) matrix to prepare Ti 3 C 2 T x -g-SA/PLA composites. The effects of Ti 3 C 2 T x -g-SA to pure PLA are investigated, including crystallization, mechanical, and thermal properties. Fourier transform infrared spectroscopy and X-ray diffraction analyses confirm that Ti 3 C 2 T x interlayer is successfully intercalated by SA, and the interlayer spacing of Ti 3 C 2 T x is increased. Differential scanning calorimetry illustrates that the cold crystallization enthalpy (ΔH cc ), melting enthalpy (ΔH m ), and crystallinity (X c ) of Ti 3 C 2 T x -g-SA/PLA composites are improved by the plasticization and heterogeneous nucleation effect of Ti 3 C 2 T x -g-SA. Specially, the Ti 3 C 2 T x -g-SA/PLA composites exhibit excellent mechanical properties at an appropriate content of the Ti 3 C 2 T x -g-SA. Compared with pure PLA, the elongation at break of the Ti 3 C 2 T x -g-SA/PLA composite is increased 5.9-fold (up to 131.6%) when only containing 0.5 wt % Ti 3 C 2 T x -g-SA. Besides, the Ti 3 C 2 T x -g-SA/PLA composites exhibit good thermal stability in the low loading (lower than 1 wt %) of Ti 3 C 2 T x -g-SA.

show abstract

Section: Resultsmentioning

confidence: 91%

Enhanced mechanical properties of poly(lactic acid) composites with ultrathin nanosheets of MXene modified by stearic acid

Yang

Liu

et al. 2019

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…A much more interesting change in the crystallinity index—for composite filled with platy one, the parameter has decreased 2.5 times whereas for cuboid material the parameter has increased by 20% compared to pristine polymer sample. The effect of nucleation and an increase in the degree of crystallinity after adding CaCO 3 [ 58 ] and other fillers are known and described in the literature [ 59 ]. The difference is due to the aspect ratio of montmorillonite plates, which are in general much thinner than calcium carbonate filler.…”

Section: Resultsmentioning

confidence: 99%

The Impact of Filler Geometry on Polylactic Acid-Based Sustainable Polymer Composites

et al. 2020

View full text Add to dashboard Cite

Recently, biocomposites have emerged as materials of great interest to the scientists and industry around the globe. Among various polymers, polylactic acid (PLA) is a popular matrix material with high potential for advanced applications. Various particulate materials and nanoparticles have been used as the filler in PLA based matrix. One of the extensively studied filler is cellulose. However, cellulose fibres, due to their hydrophilic nature, are difficult to blend with a hydrophobic polymer matrix. This leads to agglomeration and creates voids, reducing the mechanical strength of the resulting composite. Moreover, the role of the various forms of pure cellulose and its particle shape factors has not been analyzed in most of the current literature. Therefore, in this work, materials of various shapes and shape factors were selected as fillers for the production of polymer composites using Polylactic acid as a matrix to fill this knowledge gap. In particular, pure cellulose fibres (three types with different elongation coefficient) and two mineral nanocomponents: precipitated calcium carbonate and montmorillonite were used. The composites were prepared by a melt blending process using two different levels of fillers: 5% and 30%. Then, the analysis of their thermomechanical and physico-chemical properties was carried out. The obtained results were presented graphically and discussed in terms of their shape and degree of filling.

show abstract

“…The production of PLA-based composites using inorganic fillers created many possibilities for modifications, resulting in a significant range of applicability of this polymer [ 13 ]. The addition of fillers makes it possible to modify the crystalline structure; improve thermomechanical properties [ 14 , 15 , 16 ], thermal conductivity [ 17 ], and barrier properties [ 18 ]; as well as decrease flammability [ 19 ]. Moreover, in the case of using fibrous fillers, such as glass or basalt fibers, a significant improvement of the mechanical properties is noted [ 20 , 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Surface Treatment with Isocyanate and Aromatic Carbodiimide of Thermally Expanded Vermiculite Used as a Functional Filler for Polylactide-Based Composites

et al. 2021

View full text Add to dashboard Cite

In this work, thermally expanded vermiculite (TE-VMT) was surface modified and used as a filler for composites with a polylactide (PLA) matrix. Modification of vermiculite was realized by simultaneous ball milling with the presence of two PLA chain extenders, aromatic carbodiimide (KI), and 4,4’-methylenebis(phenyl isocyanate) (MDI). In addition to analyzing the particle size of the filler subjected to processing, the efficiency of mechanochemical modification was evaluated by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The composites of PLA with three vermiculite types were prepared by melt mixing and subjected to mechanical, thermomechanical, thermal, and structural evaluation. The structure of composites containing a constant amount of the filler (20 wt%) was assessed using FTIR spectroscopy and SEM analysis supplemented by evaluating the final injection-molded samples’ physicochemical properties. Mechanical behavior of the composites was assessed by static tensile test and impact strength hardness measurements. Heat deflection temperature (HDT) test and dynamic thermomechanical analysis (DMTA) were applied to evaluate the influence of the filler addition and its functionalization on thermomechanical properties of PLA-based composites. Thermal properties were assessed by differential scanning calorimetry (DSC), pyrolysis combustion flow calorimetry (PCFC), and thermogravimetric analysis (TGA). The use of filler-reactive chain extenders (CE) made it possible to change the vermiculite structure and obtain an improvement in interfacial adhesion and more favorable filler dispersions in the matrix. This translated into an improvement in impact strength and an increase in thermo-mechanical stability and heat release capacity of composites containing modified vermiculites.

show abstract

The influence of matrix crystallinity, filler grain size and modification on properties of PLA/calcium carbonate composites

Cited by 40 publications

References 23 publications

Enhanced mechanical properties of poly(lactic acid) composites with ultrathin nanosheets of MXene modified by stearic acid

Enhanced mechanical properties of poly(lactic acid) composites with ultrathin nanosheets of MXene modified by stearic acid

The Impact of Filler Geometry on Polylactic Acid-Based Sustainable Polymer Composites

The Effect of Surface Treatment with Isocyanate and Aromatic Carbodiimide of Thermally Expanded Vermiculite Used as a Functional Filler for Polylactide-Based Composites

Contact Info

Product

Resources

About