Effect of compatibilization on the properties of in situ microfibrillar composites based on polylactic acid and polypropylene

2015 ◽  
Author(s):  
Maria Oliviero ◽  
Giovanna G. Buonocore ◽  
Letizia Verdolotti ◽  
Marino Lavorgna
Keyword(s):  
Polylactic Acid ◽  
Microfibrillar Composites

scholarly journals Synchrotron X-ray In Situ Tomography of Thermally Induced Phase Separation of Polylactic Acid in 1,4-Dioxane Solution

2018 ◽  
Vol 18 (12) ◽  
pp. 7496-7503 ◽  
Author(s):  
Swann Gay ◽  
Brice Calvignac ◽  
Landry Ouanssi Kamtcheu ◽  
Thomas Beuvier ◽  
Elodie Boller ◽  
...  
Keyword(s):  
Phase Separation ◽  
Polylactic Acid ◽  
Dioxane Solution ◽  
Thermally Induced Phase Separation ◽  
Thermally Induced ◽  
X Ray

Preparation and characterization of polylactic acid-g-bamboo fiber based on in-situ solid phase polymerization

2018 ◽  
Vol 123 ◽  
pp. 646-653 ◽  
Author(s):  
Yingfeng Zuo ◽  
Wenhao Li ◽  
Ping Li ◽  
Wenjie Liu ◽  
Xingong Li ◽  
...  
Keyword(s):  
Polylactic Acid ◽  
Solid Phase ◽  
Bamboo Fiber

In situ assembly of well-dispersed Ag nanoparticles on the surface of polylactic acid-Au@polydopamine nanofibers for antimicrobial applications

2019 ◽  
Vol 184 ◽  
pp. 110506 ◽  
Author(s):  
Qingmiao Zhang ◽  
Yilei Wang ◽  
Wenkun Zhang ◽  
Michael E. Hickey ◽  
Zhuangsheng Lin ◽  
...  
Keyword(s):  
Polylactic Acid ◽  
Ag Nanoparticles

scholarly journals Effects of Methylenediphenyl 4,4’-Diisocyanate and Maleic Anhydride as Coupling Agents on the Properties of Polylactic Acid/Polybutylene Succinate/Wood Flour Biocomposites by Reactive Extrusion

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1660
Author(s):  
Young-Rok Seo ◽  
Sang-U Bae ◽  
Jaegyoung Gwon ◽  
Qinglin Wu ◽  
Birm-June Kim
Keyword(s):  
Maleic Anhydride ◽  
Polylactic Acid ◽  
Viscoelastic Properties ◽  
Interfacial Adhesion ◽  
Wood Flour ◽  
Flexural Modulus ◽  
Reactive Extrusion ◽  
Coupling Agents ◽  
Polybutylene Succinate

Polylactic acid (PLA)/polybutylene succinate (PBS)/wood flour (WF) biocomposites were fabricated by in situ reactive extrusion with coupling agents. Methylenediphenyl 4,4’-diisocyanate (MDI) and maleic anhydride (MA) were used as coupling agents. To evaluate the effects of MDI and MA, various properties (i.e., interfacial adhesion, mechanical, thermal, and viscoelastic properties) were investigated. PLA/PBS/WF biocomposites without coupling agents revealed poor interfacial adhesion leading to deteriorated properties. However, the incorporation of MDI and/or MA into biocomposites showed high performances by increasing interfacial adhesion. For instance, the incorporation of MDI resulted in improved tensile, flexural, and impact strengths and an increase in tensile and flexural modulus was observed by the incorporation of MA. Specially, remarkably improved thermal stability was found in the PLA/PBS/WF biocomposites with 1 phr MDI and 1 phr MA. Also, the addition of MDI or MA into biocomposites increased the glass transition temperature and crystallinity, respectively. For viscoelastic property, the PLA/PBS/WF biocomposites with 1 phr MDI and 1 phr MA achieved significant enhancement in storage modulus compared to biocomposites without coupling agents. Therefore, the most balanced performances were evident in the PLA/PBS/WF biocomposites with the hybrid incorporation of small quantities of MDI and MA.

In situ gel forming graft copolymers of a polyaspartamide and polylactic acid: Preparation and characterization

2008 ◽  
Vol 44 (11) ◽  
pp. 3764-3775 ◽  
Author(s):  
Giovanna Pitarresi ◽  
Fabio S. Palumbo ◽  
Antonella Albanese ◽  
Mariano Licciardi ◽  
Filippo Calascibetta ◽  
...  
Keyword(s):  
Polylactic Acid ◽  
Graft Copolymers ◽  
In Situ Gel

Fabrication of Hollow Polylactic Acid Microcapsules From Microbubble Templates

2009 ◽  
Author(s):  
Jay J. Molino ◽  
Shingo Takada ◽  
Hirofumi Daiguji ◽  
Fumio Takemura
Keyword(s):  
Polylactic Acid ◽  
Room Temperature ◽  
Methylene Chloride ◽  
Nile Red ◽  
Bubble Surface ◽  
Poly Vinyl Alcohol ◽  
Microscope Imaging ◽  
Series Of Experiments ◽  
Radius Size

Hollow polylactic acid (PLA) microcapsules from microbubbles templates are being generated inside methylene chloride (CH2Cl2) droplets formed in a poly-vinyl alcohol aqueous solution (PVAaq). By stably keeping the microbubbles, PLA can absorb to the bubble surface and become the shell of the microcapsules. It is desired to accurately control the final microcapsule radius size. Thus, in the following document, details on a series of experiments that aim to control the microcapsule final radius are covered. In situ, microscope imaging (ECLIPSE Ti-E, Nikon Corporation, Tokyo, Japan) was used to analyze the final radius size. PLA was also stained with Nile Red (excites at 485 nm, emits at 525 nm) for fluorescence visualization. These procedures allowed the verification of the parameters that influences the final microcapsule size. Experiments were performed at room temperature. Herein, details on the experimental arrangement, results and justification for how each parameter affects the final microcapsule radius.

scholarly journals The Entangled Conductive Structure of CB/PA6/PP MFCs and Their Electromechanical Properties

Polymers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 961
Author(s):  
Yu Wang ◽  
Song Liu ◽  
Huihao Zhu ◽  
Huajian Ji ◽  
Guo Li ◽  
...  
Keyword(s):  
Treatment Process ◽  
Low Cost ◽  
Conductive Polymer ◽  
High Sensitivity ◽  
Polyamide 6 ◽  
Electromechanical Properties ◽  
Microfibrillar Composites ◽  
First Time ◽  
Selective Accumulation

In this work, carbon black (CB)/polyamide 6 (PA6)/polypropylene (PP) microfibrillar composites (MFCs) were fabricated through an extrusion (hot stretching) heat treatment process. The CB-coated conductive PA6 microfibrils with high aspect ratio were in situ generated as a result of the selective accumulation of CB at the interface. At the proper temperature, a 3D entangled conductive structure was constructed in the PP matrix, due to topological entanglement between these conductive microfibrils. This unique conductive structure provided the PP composites with a low electrical conductivity percolation threshold. Moreover, the electromechanical properties of conductive MFCs were investigated for the first time. A great stability, a high sensitivity and a nice reproducibility were achieved simultaneously for CB/PA6/PP MFCs. This work provides a universal and low-cost method for the conductive polymer composites’ (CPCs) fabrication as sensing materials.

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