Enhanced impact strength of compatibilized poly(lactic acid)/polyamide 11 blends by a crosslinking agent

2020 ◽  
Vol 137 (35) ◽  
pp. 49011 ◽  
Author(s):  
Byeong‐Uk Nam ◽  
Younggon Son
Keyword(s):  
Lactic Acid ◽  
Impact Strength ◽  
Crosslinking Agent ◽  
Poly Lactic Acid ◽  
Polyamide 11

scholarly journals Poly (Lactic Acid)/Ground Tire Rubber Blends Using Peroxide Vulcanization

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1496
Author(s):  
Nicolas Candau ◽  
Oguzhan Oguz ◽  
Noel León Albiter ◽  
Gero Förster ◽  
Maria Lluïsa Maspoch
Keyword(s):  
Lactic Acid ◽  
Impact Strength ◽  
Crosslinking Agent ◽  
Mechanical Damage ◽  
Tensile Modulus ◽  
Poly Lactic Acid ◽  
Tire Rubber ◽  
Ground Tire Rubber ◽  
Clay Particles ◽  
Rubber Blends

Poly (Lactic Acid) (PLA)/Ground Tire Rubber (GTR) blends using Dicumyl peroxide (DCP) as a crosslinking agent were prepared with the following aims: propose a new route to recycle wastes rubber from the automotive industry and improve the toughness and impact strength of the inherently brittle bio-based PLA. The GTR were subjected to two types of grinding process (cryo- and dry ambient grinding). Swelling measurements revealed the grinding to be associated with a mechanical damage of the rubber chains, independently on the type of grinding or on the GTR size (from <400 µm to <63 µm). Moreover, the finest GTR contains the largest amount of reinforcing elements (carbon black, clay) that can be advantageously used in PLA/GTR blends. Indeed, the use of the finest cryo-grinded GTR in the presence of DCP showed the least decrease of the tensile strength (−30%); maintenance of the tensile modulus and the largest improvement of the strain at break (+80%), energy at break (+60%) and impact strength (+90%) as compared to the neat PLA. The results were attributed to the good dispersion of both fine GTR and clay particles into the PLA matrix. Moreover, a possible re-crosslinking of the GTR particles and/or co-crosslinking at PLA/GTR interface in presence of DCP is expected to contribute to such improved ductility and impact strength.

scholarly journals The effect of dynamic vulcanization on the morphological and mechanical properties of the toughened poly (lactic acid)/epoxidized natural rubber

2018 ◽  
Vol 14 (3) ◽  
pp. 348-352 ◽  
Author(s):  
Nur Amira Sahirah Abdullah ◽  
Zurina Mohamad
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Lactic Acid ◽  
Impact Strength ◽  
Natural Rubber ◽  
Crosslinking Agent ◽  
Epoxidized Natural Rubber ◽  
Poly Lactic Acid ◽  
Dynamic Vulcanization ◽  
The Impact

Poly (lactic acid)/epoxidized natural rubber (PLA/ENR) was prepared by using counter-rotating twin-screw extruder. For dynamic vulcanization process, ENR was compounded with 3 phr of N, N’-m-phenylenebismaleimide (HVA-2) as a crosslinking agent. The aim of this study is to determine the effect of unvulcanized and dynamically vulcanized of ENR on the properties of PLA/ENR blend. The blending of PLA with ENR was prepared with the various composition of ENR (0 wt% to 30 wt%). The morphology and mechanical properties of the blends were investigated by using scanning electron microscope (SEM), tensile test, and impact test. The unvulcanized blend produced a co-continuous morphology of PLA and ENR and the dynamically vulcanized blend shows the dispersed ENR rubber particles in PLA continuous matrix.  For both systems, the tensile strength value was dropped with the increasing amount of ENR content. The impact strength of both systems shows the maximum value at 20 wt% of ENR content. However, dynamically vulcanized PLA/ENR blend shows a better tensile strength and impact strength value as compared with unvulcanized blend.

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.

Clay-filled bio-based blends of poly(lactic acid) and polyamide 11

2012 ◽  
Author(s):  
Anna Nuzzo ◽  
Domenico Acierno ◽  
Giovanni Filippone
Keyword(s):  
Lactic Acid ◽  
Poly Lactic Acid ◽  
Polyamide 11

scholarly journals Impact Toughness and Ductility Enhancement of Biodegradable Poly(lactic acid)/Poly(ε-caprolactone) Blends via Addition of Glycidyl Methacrylate

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Wei Kit Chee ◽  
Nor Azowa Ibrahim ◽  
Norhazlin Zainuddin ◽  
Mohd Faizal Abd Rahman ◽  
Buong Woei Chieng
Keyword(s):  
Lactic Acid ◽  
Impact Strength ◽  
Glycidyl Methacrylate ◽  
Interfacial Adhesion ◽  
Tensile Modulus ◽  
Sem Analysis ◽  
Poly Lactic Acid ◽  
Biodegradable Poly ◽  
Interfacial Compatibility ◽  
The Impact

Poly(lactic acid) (PLA)/poly(ε-caprolactone) (PCL) blends were prepared via melt blending technique. Glycidyl methacrylate (GMA) was added as reactive compatibilizer to improve the interfacial adhesion between immiscible phases of PLA and PCL matrices. Tensile test revealed that optimum in elongation at break of approximately 327% achieved when GMA loading was up to 3wt%. Slight drop in tensile strength and tensile modulus at optimum ratio suggested that the blends were tuned to be deformable. Flexural studies showed slight drop in flexural strength and modulus when GMA wt% increases as a result of improved flexibility by finer dispersion of PCL in PLA matrix. Besides, incorporation of GMA in the blends remarkably improved the impact strength. Highest impact strength was achieved (160% compared to pure PLA/PCL blend) when GMA loading was up to 3 wt%. SEM analysis revealed improved interfacial adhesion between PLA/PCL blends in the presence of GMA. Finer dispersion and smooth surface of the specimens were noted as GMA loading increases, indicating that addition of GMA eventually improved the interfacial compatibility of the nonmiscible blend.

Fabrication of super tough poly(lactic acid)/ethylene-co-vinyl-acetate blends via a melt recirculation approach: static-short term mechanical and morphological interpretation

RSC Advances ◽  
2016 ◽  
Vol 6 (18) ◽  
pp. 14580-14588 ◽  
Author(s):  
Rajendra Kumar Singla ◽  
Saurindra N. Maiti ◽  
Anup K. Ghosh
Keyword(s):  
Lactic Acid ◽  
Impact Strength ◽  
Vinyl Acetate ◽  
Poly Lactic Acid ◽  
Short Term ◽  
Izod Impact Strength ◽  
Izod Impact

The notched Izod impact strength of PLA/EVA blends was enhanced significantly with improved toughness making blends super tough.

Characteristics of poly(lactic acid) reinforced composites with waste cotton

2011 ◽  
Vol 31 (6-7) ◽  
Author(s):  
Xiuju Zhang ◽  
Juncai Shen ◽  
Tingting Yang ◽  
Bihua Ye ◽  
Zhidan Lin ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Lactic Acid ◽  
Impact Strength ◽  
Flexural Strength ◽  
Polylactic Acid ◽  
Resource Utilization ◽  
Cotton Cloth ◽  
Poly Lactic Acid ◽  
Reinforced Composites ◽  
Crystallization Properties

Abstract In this study, waste cotton cloth (RC) was bonded with soluble starches as an adhesive, then dried, cut into particles and filled into polylactic acid (PLA) to achieve resource efficiency. The mechanical, thermal and crystallization properties of the composites were characterized. The results indicated that with the addition of RC, the tensile strength, impact strength and flexural strength of PLA composites improved. Also, the heat distortion temperatures increased slowly, indicating that RC filled into PLA can be turned back into useful items without the degradation of PLA composites. This is a good way to give direction to the resource utilization of waste clothing. The addition of RC could significantly reduce the spherulitic size of PLA.

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