Toughening Modification of Poly(lactic acid) via Melt Blending

2012 ◽  
pp. 27-46 ◽  
Author(s):  
Hongzhi Liu ◽  
Jinwen Zhang
Keyword(s):  
Lactic Acid ◽  
Poly Lactic Acid ◽  
Melt Blending ◽  
Toughening Modification

Mechanical, Thermal, and Morphological Properties of Thermoplastic Starch/Poly(lactic acid/Poly(butylene adipate-co-terephthalate) Blends

2014 ◽  
Vol 970 ◽  
pp. 312-316
Author(s):  
Sujaree Tachaphiboonsap ◽  
Kasama Jarukumjorn
Keyword(s):  
Lactic Acid ◽  
Impact Strength ◽  
Interfacial Adhesion ◽  
Tensile Modulus ◽  
Thermoplastic Starch ◽  
Morphological Properties ◽  
Poly Lactic Acid ◽  
Melt Blending ◽  
Elongation At Break ◽  
Blending Method

Thermoplastic starch (TPS)/poly (lactic acid) (PLA) blend and thermoplastic starch (TPS)/poly (lactic acid) (PLA)/poly (butylene adipate-co-terephthalate) (PBAT) blend were prepared by melt blending method. PLA grafted with maleic anhydride (PLA-g-MA) was used as a compatibilizer to improve the compatibility of the blends. As TPS was incorporated into PLA, elongation at break was increased while tensile strength, tensile modulus, and impact strength were decreased. Tensile properties and impact properties of TPS/PLA blend were improved with adding PLA-g-MA indicating the enhancement of interfacial adhesion between PLA and TPS. With increasing PBAT content, elongation at break and impact strength of TPS/PLA blends were improved. The addition of TPS decreased glass transition temperature (Tg), crystallization temperature (Tc), and melting temperature (Tm) of PLA. Tgand Tcof TPS/PLA blend were decreased by incorporating PLA-g-MA. However, the presence of PBAT reduced Tcof TPS/PLA blend. Thermal properties of TPS/PLA/PBAT blends did not change with increasing PBAT content. SEM micrographs revealed that the compatibilized TPS/PLA blends exhibited finer morphology when compared to the uncompatibilized TPS/PLA blend.

scholarly journals The combined plasticization of jute and tung oil anhydride for jute fiber reinforced poly(lactic acid) composites

2021 ◽  
pp. 096739112110576
Author(s):  
Ying Zhou ◽  
Can Chen ◽  
Lan Xie ◽  
Xiaolang Chen ◽  
Guangqiang Xiao ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Physical And Mechanical Properties ◽  
Complex Viscosity ◽  
Poly Lactic Acid ◽  
Melt Blending ◽  
Sem Images ◽  
Pseudoplastic Fluid ◽  
Tung Oil ◽  
Biodegradable Poly ◽  
The Impact

In this work, novel plasticizing biodegradable poly (lactic acid) (PLA) composites were prepared by melt blending of jute and tung oil anhydride (TOA), and the physical and mechanical properties of PLA/jute/TOA composites were tested and characterized. The impact strength of PLA/jute/TOA composites significantly increases with increasing the content of TOA. The SEM images of fracture surface of PLA/jute/TOA composites become rough after the incorporation of TOA. In addition, TOA changes the crystallization temperature and decomposition process of PLA/jute/TOA composites. With increasing the amount of TOA, the value of storage modulus (E′) of PLA/jute/TOA composites gradually increases. The complex viscosity (η*) values for all samples reduce obviously with increasing the frequency, which means that the pure PLA and PLA/jute/TOA composites is typical pseudoplastic fluid. This is attributed to the formation of crosslinking, which restricts the deformation of the composites.

scholarly journals Modification of poly(lactic) acid by reactive extrusion and its melt blending with acrylonitrile–butadiene–styrene

2020 ◽  
Vol 69 (9) ◽  
pp. 794-803
Author(s):  
Tobias Abt ◽  
Mohammad Reza Kamrani ◽  
Jonathan Cailloux ◽  
Orlando Santana ◽  
Miguel Sánchez‐Soto
Keyword(s):  
Lactic Acid ◽  
Acrylonitrile Butadiene Styrene ◽  
Reactive Extrusion ◽  
Poly Lactic Acid ◽  
Melt Blending ◽  
Butadiene Styrene

Preparation and characterization of poly(lactic acid)/elastomer blends prepared by melt blending technique

2013 ◽  
Vol 46 (3) ◽  
pp. 253-268 ◽  
Author(s):  
Mujtahid Kaavessina ◽  
Ilias Ali ◽  
Rabeh Elleithy ◽  
Saeed M. Al-Zahrani
Keyword(s):  
Lactic Acid ◽  
Poly Lactic Acid ◽  
Melt Blending

scholarly journals A review on graft compatibilizer for thermoplastic elastomer blend

2021 ◽  
Vol 2080 (1) ◽  
pp. 012003
Author(s):  
K.K. Nitiyah ◽  
Luqman Musa ◽  
M.S.M. Rasidi ◽  
Shayfull Zamree Abd Rahim ◽  
Rozyanty Rahman ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Natural Rubber ◽  
Thermoplastic Elastomer ◽  
Synthetic Polymers ◽  
The Other ◽  
Poly Lactic Acid ◽  
Melt Blending ◽  
Internal Mixer ◽  
The Impact ◽  
Elastomer Blend

Abstract A biodegradable thermoplastic elastomer (TPE) blend is developed by blending poly (lactic acid) (PLA) and natural rubber (NR) or epoxidized natural rubber (ENR) and it is a sustainable substitution in recent years for synthetic polymers. PLA is high in mechanical strength and compostable, but it is highly stiff and brittle. The incorporation of NR or ENR to PLA increases the impact strength and toughness of PLA. However, the disparity in polarity between PLA and elastomer phase like NR and ENR results in TPE blend being incompatible. Hence, compatibilization is essential to improve its polarity and develop interactions. Compatibilizer that composed of two different polymer is known is graft compatibilizer with the aid of grafting agent. The graft compatibilizers are divided into two categories. The first type is made up of one polymer and grafting agent and, the other one is composed of two polymer groups and grafting agent. These two types of graft compatibilizer can be prepared via two different method such as direct melt blending and solution. Apart from this, the TPE blend is produced via the melt blending technique with mixing machines such as internal mixer and extruder. This article has reviewed the preparation of the graft compatibilizer and blending technique of TPE. Based on the findings, the graft compatibilizers has a significant role in improving miscibility and compatibility across blend composed of different phase.

Natural wastes as particle filler for poly(lactic acid)-based composites

2018 ◽  
Vol 53 (6) ◽  
pp. 783-797 ◽  
Author(s):  
Daniele Battegazzore ◽  
Amir Noori ◽  
Alberto Frache
Keyword(s):  
Lactic Acid ◽  
Mechanical Characteristics ◽  
Raw Materials ◽  
Poly Lactic Acid ◽  
Melt Blending ◽  
Renewable Raw Materials ◽  
By Products ◽  
Natural Fillers ◽  
Selection Of ◽  
Hemp Hurd

The paper describes the production and the mechanical characteristics of composites made completely of renewable raw materials. Several wastes or by-products from agro-industrial production namely hemp hurd, alfalfa, and grape stem were analyzed with respect to their thermal stability, morphological, and chemical composition in an attempt to validate their use in composites. Such natural particle fillers were used in the range of 10–50 wt% in combination with poly(lactic acid) by melt blending to obtain fully bio-based composites. These fillers were responsible for a noteworthy increase in the storage modulus. Furthermore, two micromechanical models (Voigt and Halpin–Tsai) were used to mathematically fitted the experimental data, and then the unknown moduli were extrapolated and compared with other natural fillers. Finally, the flexural strength of the bio-composites and the adhesion evaluation by exploiting Pukanszky’s model were carried out. As a result, the hemp hurd in the form of chips was the best investigated filler, which showed the highest calculated modulus of 10.5 GPa (Voigt) and the best filler–matrix interaction with “B” (Pukanszky’s coefficient) of 2.10. This information can be useful when comparison and selection of a suitable filler among the natural fillers are required.

Non-isothermal crystallization kinetics, thermal degradation behavior and mechanical properties of poly(lactic acid)/MOF composites prepared by melt-blending methods

RSC Advances ◽  
2016 ◽  
Vol 6 (75) ◽  
pp. 71461-71471 ◽  
Author(s):  
Xiu Dai ◽  
Yu Cao ◽  
Xiaowei Shi ◽  
Xinlong Wang
Keyword(s):  
Lactic Acid ◽  
Thermal Degradation ◽  
Isothermal Crystallization ◽  
Metal Organic Framework ◽  
Poly Lactic Acid ◽  
Melt Blending ◽  
Isothermal Crystallization Kinetics ◽  
Blending Method ◽  
Thermal Degradation Behavior ◽  
Metal Organic

In this article, poly(lactic acid)/metal–organic framework composites were prepared by melt-blending method and the effects of MOFs on the non-isothermal crystallization, thermal degradation and mechanical property of poly(lactic acid) were studied.

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