Polylactide compositions. Part 1: Effect of filler content and size on mechanical properties of PLA/calcium sulfate composites

Murariu, Marius; Ferreira, Amália Da Silva; Degée, Philippe; Alexandre, Michaël; Dubois, Philippe

doi:10.1016/j.polymer.2007.02.067

Cited by 94 publications

(101 citation statements)

References 20 publications

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“…Recently the interest in poly(lactic acid) (PLA) as well as in its copolymers [1][2][3][4][5][6][7], blends [8,9] and composites [10][11][12][13][14][15][16][17][18][19][20][21] increased enormously for various reasons. PLA has several advantages compared to fossil fuel based polymers.…”

Section: Introductionmentioning

confidence: 99%

“…The use of this material may result in a reasonable application of the byproduct and allow the modification of PLA as well. PLA/CaSO 4 composites were reported to have advantageous properties including good strength, impact resistance and decreased price [18].…”

Section: Introductionmentioning

confidence: 99%

“…Recently several papers were published by some of the authors showing the advantages of CaSO 4 as filler [18][19][20][21][22]. It was shown that the β-anhydrite II (AII) form of gypsum is thermally stable, does not absorb significant amounts of water and its use as filler in PLA results in composites with good thermal, mechanical and impact properties.…”

Section: Introductionmentioning

confidence: 99%

“…The study of several CaSO 4 types with different particle characteristics indicated that good homogeneity and advantageous properties can be achieved at an average particle size of 9 μm. The good performance of the composites was attributed to favorable interactions developing between the filler and the polymer matrix [18]. However, this relatively large particle size usually results in easy debonding especially in such stiff matrices like PLA [23].…”

Section: Introductionmentioning

confidence: 99%

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Factors affecting the properties of PLA/CaSO4 composites: homogeneity and interactions

Molnár

Móczó

Murariu

et al. 2009

Express Polym. Lett.

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Abstract. Composites were prepared from poly(lactic acid) (PLA) and a natural CaSO4 filler to study the developed structure and the interaction of the components. The filler was characterized very thoroughly by several techniques and the results indicated that the filler contains a considerable amount of small particles with size much below the volume average size of 4.4 μm. The presence of these small particles did not result in inhomogeneity, considerable extent of aggregation was not observed in the composites. The filler was coated with stearic acid to modify interactions and optimum coverage corresponded to the amount estimated from the specific surface area of the filler. Mechanical properties changed only slightly with increasing amounts of the uncoated filler, but coating resulted in a drastic change of tensile properties and deformation behavior. Considerable plastic flow was observed around filler particles on the fracture surface of broken specimens. The quantitative estimation of interfacial interactions and their comparison to existing data proved that the interaction of PLA and CaSO4 corresponds to values observed in other mineral filled polymers. On the other hand, the reinforcing effect of the coated filler is extremely poor indicating almost zero interaction. Additional experiments proved that considerable amount of stearic acid dissolves in PLA and plasticizes the polymer. Stearic acid seems to desorb also from the surface of the filler, dissolve in the polymer and modify matrix properties.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Factors affecting the properties of PLA/CaSO4 composites: homogeneity and interactions

Molnár

Móczó

Murariu

et al. 2009

Express Polym. Lett.

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show abstract

“…16], polyamide elastomer [17], acrylonitrile-butadiene-styrene copolymer, or various impact modifiers [18][19][20][21][22][23][24][25][26] is effective. Furthermore, plasticizers such as citrate esters [27][28][29][30][31][32][33][34][35][36][37], polyethylene glycols [27,33,[38][39][40][41][42][43][44] or manifold other molecules [29,43,[45][46][47][48] can be used.…”

mentioning

confidence: 99%