Rheological and thermal properties of polylactide/organic montmorillonite nanocomposites

Wang, Biao; Wan, Tong; Zeng, Wei

doi:10.1002/app.36770

Cited by 14 publications

(9 citation statements)

References 35 publications

(48 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…TCP molecules can migrate to the surface of the PLA blends forming an insulating layer and improving the thermal stability of the blends . Moreover, similar results have been reported by Wang et al They found that the char formation from the addition of MMT acted as a heat barrier, which inhibited the volatiles of the decomposition products resulting in the increased thermal resistance of the blends …”

Section: Resultssupporting

confidence: 73%

Properties and characteristics of polylactide blends: Synergistic combination of poly(butylene succinate) and flame retardant

Suparanon

Phusunti

Phetwarotai

2017

Polymers for Advanced Techs

View full text Add to dashboard Cite

A study on the influence of flame-retardant types, poly(butylene succinate) (PBS) contents, and combination of flame retardant and PBS on the mechanical, thermal, morphological, and flame retardancy properties of polylactide (PLA) and PLA/PBS blends was investigated. Blending of PLA, PBS, and flame retardant was prepared by a twin screw extruder. Tricresyl phosphate (TCP) and montmorillonite (MMT) were used as a flame retardant, whereas PBS acted as a flexible material for enhancing the fire resistance and toughness of PLA, respectively. The results revealed that the introducing of TCP and MMT greatly improved the impact strength of the PLA. The impact toughness of PLA blends with 20 wt% of PBS increased to about 244% that of neat PLA. The addition of flame retardants markedly improved the limiting oxygen index of PLA from 18.0% to 30.1% and 24.3% for the blends containing TCP and MMT. The V-0 rating in UL-94 testing was achieved with PLA/TCP blend. Elongation at break, impact toughness, and thermal stability of PLA significantly increased with the increment of PBS concentration. The synergistic effect of flame retardant and PBS afforded the PLA blends with outstanding increase of impact resistance. Furthermore, the flame retardant of TCP in the system not only affected dripping behavior and total flame time of PLA/PBS blends but also improved limiting oxygen index values due to the forming of char layer and inhibiting of burning mechanism.

show abstract

Section: Resultssupporting

confidence: 73%

Properties and characteristics of polylactide blends: Synergistic combination of poly(butylene succinate) and flame retardant

Suparanon

Phusunti

Phetwarotai

2017

Polymers for Advanced Techs

View full text Add to dashboard Cite

show abstract

“…Furthermore, to investigate the effect of OMMT on the tensile ductility of PLA matrix, the tensile performance of PLA/OMMT (100/x) with various OMMT loadings also are presented in Figure . It can be pointed out that the incorporation of OMMT could improve the elongation at break of PLA slightly (from 3.5% for neat PLA to 4.3% with 1 phr OMMT) without EPDM, which is in accordance with the literature . However, compared to the minor toughening effect of OMMT on PLA/OMMT samples, the incorporation of OMMT made a stronger enhancement in the ductility of these PLA/EPDM/OMMT samples due to the great compatibilizing effect of OMMT in the immiscible PLA/EPDM blends.…”

Section: Resultsmentioning

confidence: 99%

Compatibilization of poly(lactic acid)/ethylene‐propylene‐diene rubber blends by using organic montmorillonite as a compatibilizer

Wang

Pang

Pan

et al. 2016

J of Applied Polymer Sci

View full text Add to dashboard Cite

This work focuses on phase morphology and properties of immiscible poly(lactic acid)/ethylene‐propylene‐diene rubber (PLA/EPDM) blends compatibilized with organic montmorillonite (OMMT). Effect of OMMT loading on phase morphology, mechanical properties, and blown film bubble stability was investigated. Transmission electron micrographs show that a large number of OMMT nanolayers locate at interfacial region between PLA and EPDM phase, as well as in EPDM phase due to higher affinity of OMMT with EPDM. Scanning electron micrographs show that EPDM domain size decreases largely with increasing OMMT loading, which is associated with reduction of interfacial energy and inhibition of coalescence by the OMMT locating at the interface, acting as an emulsifier to enwrap the discrete domains. As OMMT loading increases from 0 to 1 phr, elongation at break increases from 20.4 to 151.7% and notched impact strength is enhanced from 8.2 to 31.7 kJċm−2. The reduced EPDM domain is the main reason for enhanced toughness of PLA/EPDM/OMMT samples according to crazing with shear yielding mechanism. However, with more than 2 phr of OMMT, the toughness decreases largely due to excessive stress concentration and OMMT aggregation. Attempts were made to produce ductile films from the PLA/EPDM/OMMT nanocomposites by using blown film extrusion. Improvement in blown film bubble stability and tensile ductility of PLA/EPDM/OMMT films also shows that OMMT is an efficient compatibilizer, as well as a processing aid for PLA/EPDM blends. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 44192.

show abstract

“…The resulting platelet alignment decreases the apparent viscosity so that it approaches that of the neat polymer melt [32,31]. This ability to re-orient the silicates layers or tactoids in response to externally applied flows also controls the viscoelastic properties of the composites [33].…”

Section: Composites Characterizationmentioning

confidence: 99%

Surfactant-free dimer fatty acid polyamide/montmorillonite bio-nanocomposites

Macheca

Gnanasekaran²,

Focke³

2013

Colloid Polym Sci

View full text Add to dashboard Cite

Polyamide bio-nanocomposites were successfully prepared using a surfactant-free approach. The clay morphology was fixed by dispersing the ammonium ion-exchanged clay in acetic acid. This was mixed wi th an aceti c aci d sol uti on of the polyamide and the composite was recovered by precipitation with water. The composites featured a mixed morphology containing some exfoliated clay sheets together with nano-sized clay tactoids.Bio-nanocomposites containing as much as 27.5 wt.% clay were obtained. At this filler level, and depending on the temperature, the modulus was up to nine times higher than that of the parent polymer. Addition of clay also increased the glass transition temperature by as much as 5°C. This indicates that the high interfacial surface area, presented by the clay platelets dispersed in the matrix, significantly impaired the polymer chain mobility.

show abstract

Rheological and thermal properties of polylactide/organic montmorillonite nanocomposites

Cited by 14 publications

References 35 publications

Properties and characteristics of polylactide blends: Synergistic combination of poly(butylene succinate) and flame retardant

Properties and characteristics of polylactide blends: Synergistic combination of poly(butylene succinate) and flame retardant

Compatibilization of poly(lactic acid)/ethylene‐propylene‐diene rubber blends by using organic montmorillonite as a compatibilizer

Surfactant-free dimer fatty acid polyamide/montmorillonite bio-nanocomposites

Contact Info

Product

Resources

About