Thermal, mechanical, and rheological properties of plasticized poly(<scp>L</scp>‐lactic acid)

Ge, Huanhuan; Yang, Fan; Hao, Yanping; Wu, Guangfeng; Zhang, Huiliang; Dong, Lisong

doi:10.1002/app.37620

Cited by 72 publications

(43 citation statements)

References 29 publications

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“…Peak temperatures and peak areas were determined using the instrument software. The percentage of crystallinity ( X c ) for each material was calculated according to the following equation:

{italicX}_{italicc} (%) = (Δ {italicH}_{italicm} / W Δ H °_{italicm}) \times 100

where Δ H m (J/g) is the heat of fusion of the sample, W is the PLA weight fraction in the sample, and Δ H ° m is the theoretical heat of fusion of 100% crystalline PLA (93.7 J/g) …”

Section: Methodsmentioning

confidence: 99%

“…The physical properties of PLA may be modified by blending the polymer with other biodegradable polymers or copolymers. To easily achieve property modulation, the crucial point seems to be the miscibility and compatibility between the phases . Poly(propylene glycol), poly( ε ‐caprolactone) (PCL), poly(ethylene oxide), poly(hydroxy butyrate), and poly(ethylene glycol) were found to be efficient plasticizers for PLA .…”

Section: Introductionmentioning

confidence: 99%

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Characterization of an antimicrobial poly(lactic acid) film prepared with poly(ε‐caprolactone) and thymol for active packaging

Qin

Yuan

et al. 2014

Polymers for Advanced Techs

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Antimicrobial active films based on poly(lactic acid) (PLA) were prepared with poly(ε‐caprolactone) (PCL) and thymol (0, 3, 6, 9, and 12 wt%) by solvent casting methods. The films were characterized by thermal, structural, mechanical, gas barrier, and antimicrobial properties. Scanning electron microscopy analysis revealed that the surface of film became rougher with certain porosity when thymol was incorporated into the PLA/PCL blends. Thymol acted as plasticizers, which reduce the intermolecular forces of polymer chains, thus improving the flexibility and extensibility of the films. The addition of PCL into the pure PLA film decreased the glass transition temperature of the films. The presence of thymol decreased the crystallinity of PLA phase, but did not affect the thermal stability of films. Water vapor barrier properties of films slightly decreased with the increase of thymol loading. The antimicrobial properties of thymol containing films showed a significant activity against Escherichia coli and Listeria monocytogenes. The results indicated the potential of PLA/PCL/thymol composites for applications in antimicrobial packaging. Copyright © 2014 John Wiley & Sons, Ltd.

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“…Peak temperatures and peak areas were determined using the instrument software. The percentage of crystallinity ( X c ) for each material was calculated according to the following equation:

{italicX}_{italicc} (%) = (Δ {italicH}_{italicm} / W Δ H °_{italicm}) \times 100

where Δ H m (J/g) is the heat of fusion of the sample, W is the PLA weight fraction in the sample, and Δ H ° m is the theoretical heat of fusion of 100% crystalline PLA (93.7 J/g) …”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characterization of an antimicrobial poly(lactic acid) film prepared with poly(ε‐caprolactone) and thymol for active packaging

Qin

Yuan

et al. 2014

Polymers for Advanced Techs

View full text Add to dashboard Cite

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“…Nevertheless, improvement in thermal and mechanical properties of PLA is still needed to pursue commercial success. To achieve high performance of PLA, many studies on PLA‐based nanocomposites have been performed by incorporating nanoparticles, such as clays , carbon nanotubes , and hydroxyapatite . However, research on PLA‐based nanocomposites containing graphene sheets (GSs) or graphite nanoplatelets has just started .…”

Section: Introductionmentioning

confidence: 99%

Preparation of polylactide/graphene composites from liquid-phase exfoliated graphite sheets

Xiao

Bergeret

et al. 2013

Polym. Compos.

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Polylactide (PLA)/graphene nanocomposites were prepared by a facile and low‐cost method of solution‐blending of PLA with liquid‐phase exfoliated graphene using chloroform as a mutual solvent. Transmission electron microscopy (TEM) was used to observe the structure and morphology of the exfoliated graphene. The dispersion of graphene in PLA matrix was examined by scanning electron microscope, X‐ray diffraction, and TEM. FTIR spectrum and the relatively low ID/IG ratio in Raman spectroscopy indicate that the structure of graphene sheets (GSs) is intact and can act as good reinforcement fillers in PLA matrix. Thermogravimetric analysis and dynamic mechanical analysis reveal that the addition of GSs greatly improves the thermal stability of PLA/GSs nanocomposites. Moreover, tensile strength of PLA/GSs nanocomposites is much higher than that of PLA homopolymer, increasing from 36.64 (pure PLA) up to 51.14 MPa (PLA/GSs‐1.0). POLYM. COMPOS., 35:396–403, 2014. © 2013 Society of Plastics Engineers

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“…However, despite its beneficial properties such as biodegradability, biocompatibility, and process capability, PLA is brittle in nature and thus requires another agent to improve flexibility. One of the most popular and practical methods to overcome this drawback is by blending PLA with other polymers and plasticizers . Among the other polymers, poly(ethylene glycol) (PEG) is one of the most commonly used plasticizers; it can improve the chain mobility, elongation at break, and softness of PLA .…”

Section: Introductionmentioning

confidence: 99%

Environmental usefulness of PLA/PEG blends for controlled‐release systems of soil‐applied herbicides

Rychter

Lewicka

Rogacz

2019

J of Applied Polymer Sci

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Blends consisting of biodegradable polylactide (PLA) and poly(ethylene glycol) (PEG) were investigated for their usefulness as an environmentally friendly herbicide formulation with prolonged activity. The aim of this study was to evaluate the release rate of selected soil‐applied herbicides from the PLA/PEG blend containing PEG of various molecular weights and to assess the phytotoxicity of the PEGs according to OECD 208 guidelines. The release rate of immobilized herbicides was correlated with degradation of the blends used. The progress of PLA/PEG blend degradation in water, soil, and activated sludge was estimated by sample weight loss, changes in blend composition, and microscopic observations of the blend surfaces during the experiment. The proposed formulation of the immobilized herbicide in a blend consisting of slowly biodegradable PLA and water‐soluble PEG provides the possibility to release the herbicides for a relatively long time, for approximately six months, which is a demand of weed management. The effect of PEGs on plant growth and development was dependent on both their concentration and molecular weight. With a higher concentration in soil and a higher molecular weight of PEG, a more harmful effect on plants was noticed. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47856.

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Thermal, mechanical, and rheological properties of plasticized poly(L‐lactic acid)

Cited by 72 publications

References 29 publications

Characterization of an antimicrobial poly(lactic acid) film prepared with poly(ε‐caprolactone) and thymol for active packaging

Characterization of an antimicrobial poly(lactic acid) film prepared with poly(ε‐caprolactone) and thymol for active packaging

Preparation of polylactide/graphene composites from liquid-phase exfoliated graphite sheets

Environmental usefulness of PLA/PEG blends for controlled‐release systems of soil‐applied herbicides

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