Compatibilization of Polypropylene/Corn Starch Plasticized with Diethanol Amine

In the presented paper, diethanol amine is employed to plasticize corn starch, and plasticized starch is incorporated into polypropylene to create semibio-based composites with the aid of compatibilizer, maleic anhydride-grafted PP (PPMA). Compared with PP/starch blend, the presence of diethanol amine changes the morphology and increases the plasticity of starch due to the reduction effect of intermolecular hydrogen bonding interactions. Adding PPMA could reduce the dispersed size of starch granules in the polymer matrix due to in situ reactive compatibilization. Addition of 30 wt% PPMA decreases the starch granules size from ~10 μm to ~5 μm, and increases the tensile strength from 16 MPa for PP/plasticized starch to 30 MPa, increased by 87.5%. Thus, as-created bio-composites with improved mechanical properties will find many potential applications such as packaging.

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Effect of Diisocyanates as Compatibilizer on the Properties of BF/PBAT Composites by In Situ Reactive Compatibilization, Crosslinking and Chain Extension

Materials ◽

10.3390/ma13030806 ◽

2020 ◽

Vol 13 (3) ◽

pp. 806 ◽

Cited By ~ 2

Author(s):

Xiwei Xie ◽

Caili Zhang ◽

Yunxuan Weng ◽

Xiaoqian Diao ◽

Xinyu Song

Keyword(s):

Mechanical Properties ◽

Impact Strength ◽

Phenyl Isocyanate ◽

Chain Extension ◽

Hydroxyl Group ◽

Reactive Compatibilization ◽

Carbamate Group ◽

Bamboo Powder ◽

Reactive Compatibilizer

Due to the hydrophobic nature of poly (butylene terephthalate) (PBAT), and the hydrophilic nature of bamboo flour (BF), a BF/PBAT (50/50) blend shows low mechanical properties, and especially shows poor impact strength. In order to increase the interfacial adhesion between BF and PBAT, diisocyanate was used as a reactive compatibilizer to modify bamboo powder. A series of BF/PBAT composites were prepared by the method of mixing and melting in an internal mixer. After adding reactive compatibilizer 4,4′-methylenebis(phenyl isocyanate) (MDI), BF/PBAT (50/50) composites with high mechanical properties were successfully prepared. The tensile strength, elongation at break, and impact strength of the BF/MDI-2/PBAT composite with 2 wt % MDI content were increased by 1.9, 6.8, and 4.3 times respectively over the BF/PBAT blend without the added MDI. The higher toughening effect of MDI in BF/PBAT composites can be mainly ascribed to the improved interface bonding between BF and PBAT. The isocyanate group of MDI can react with the hydroxyl group on the BF surface and in situ formation of the carbamate group on the BF surface. The residual isocyanate can then react with the hydroxyl group of PBAT and form carbamate groups. The rheological behaviors demonstrate that addition of appropriate amounts of MDI, 1 wt % and 2 wt %, can promote the flowability of the molten BF/PBAT composites due to the decrease in interparticle interaction between bamboo powder and the increase in the thermal motion of the molecules.

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Reactive compatibilization of PA12/plasticized starch blends: Towards improved mechanical properties

European Polymer Journal ◽

10.1016/j.eurpolymj.2011.09.017 ◽

2011 ◽

Vol 47 (12) ◽

pp. 2361-2371 ◽

Cited By ~ 19

Author(s):

F. Teyssandier ◽

P. Cassagnau ◽

J.F. Gérard ◽

N. Mignard

Keyword(s):

Mechanical Properties ◽

Reactive Compatibilization ◽

Starch Blends ◽

Plasticized Starch

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Optical Features of Lanthanide Luminescent Hydrogel Based on Polyethylene Glycol with Silica Nanoparticles

Science of Advanced Materials ◽

10.1166/sam.2021.3850 ◽

2021 ◽

Vol 13 (1) ◽

pp. 123-130

Author(s):

Zhihuan Zhao ◽

Yao Wang ◽

Haoyang Jiang ◽

Jixian Liu ◽

Linjun Huang ◽

...

Keyword(s):

Mechanical Properties ◽

Polyethylene Glycol ◽

Silica Nanoparticles ◽

Optoelectronic Devices ◽

Hybrid Hydrogel ◽

Peg Hydrogels ◽

Polymer Hybrid ◽

Hybrid Hydrogels ◽

Potential Applications

Inorganic/polymer hybrid hydrogels generally exhibit excellent mechanical properties, while extra function include luminescence are extremely explored due to the further application in sensors and optoelectronic devices. Herein, we report the rare-earth (RE) complex/silica nanoparticles (SNs) luminescent hybrid polyethylene glycol (PEG) hydrogels showing stable luminescence. The hybrid hydrogels coordinated with RE (Eu3+) complex are fabricated via a convenient in situ photocrosslinked procedure. The coordination polymers showed red luminescent color under the 365 nm UV irradiation. Furthermore, the hybrid hydrogel exhibited long luminescence lifetime. These properties of hybrid luminescent hydrogel gave rise to a great improvement in the potential applications as a soft material.

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Improved Mechanical and Thermal Properties of Polypropylene Blends Based on Diethanolamine-Plasticized Corn Starch via in Situ Reactive Compatibilization

Industrial & Engineering Chemistry Research ◽

10.1021/ie4025243 ◽

2013 ◽

Vol 52 (46) ◽

pp. 16232-16238 ◽

Cited By ~ 8

Author(s):

Lina Liu ◽

Youming Yu ◽

Ping’an Song

Keyword(s):

Thermal Properties ◽

Corn Starch ◽

Mechanical And Thermal Properties ◽

Reactive Compatibilization ◽

Polypropylene Blends

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A supramolecular network derived by rotaxane tethering three ureido pyrimidinone groups

Chemical Communications ◽

10.1039/c9cc01660k ◽

2019 ◽

Vol 55 (36) ◽

pp. 5231-5234 ◽

Cited By ~ 1

Author(s):

Si-Jia Rao ◽

Kazuko Nakazono ◽

Xiaobin Liang ◽

Ken Nakajima ◽

Toshikazu Takata

Keyword(s):

Mechanical Properties ◽

Hydrogen Bonding ◽

Supramolecular Network ◽

Intermolecular Hydrogen Bonding ◽

Hydrogen Bonding Interactions

A rotaxane-cross-linked supramolecular network with good mechanical properties resulting from a trifunctional [2]rotaxane via intermolecular hydrogen bonding interactions.

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Mechanical properties, rheological behaviors, and phase morphologies of high-toughness PLA/PBAT blends by in-situ reactive compatibilization

Composites Part B Engineering ◽

10.1016/j.compositesb.2019.107028 ◽

2019 ◽

Vol 173 ◽

pp. 107028 ◽

Cited By ~ 33

Author(s):

Xin Wang ◽

Shaoxian Peng ◽

Hao Chen ◽

Xiaolei Yu ◽

Xipo Zhao

Keyword(s):

Mechanical Properties ◽

Reactive Compatibilization ◽

Rheological Behaviors ◽

High Toughness

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An in situ and ex situ TEM study of the formation of thin cobalt silicide films by molecular beam epitaxy on the silicon (100) surface

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010010648x ◽

1988 ◽

Vol 46 ◽

pp. 884-885

Author(s):

D. Loretto ◽

J. M. Gibson ◽

S. M. Yalisove ◽

R. T. Tung

Keyword(s):

Molecular Beam Epitaxy ◽

Molecular Beam ◽

Defect Density ◽

High Vacuum ◽

Ultra High Vacuum ◽

Ex Situ ◽

Metal Base ◽

In Situ Experiments ◽

Potential Applications

The cobalt disilicide/silicon system has potential applications as a metal-base and as a permeable-base transistor. Although thin, low defect density, films of CoSi2 on Si(111) have been successfully grown, there are reasons to believe that Si(100)/CoSi2 may be better suited to the transmission of electrons at the silicon/silicide interface than Si(111)/CoSi2. A TEM study of the formation of CoSi2 on Si(100) is therefore being conducted. We have previously reported TEM observations on Si(111)/CoSi2 grown both in situ, in an ultra high vacuum (UHV) TEM and ex situ, in a conventional Molecular Beam Epitaxy system.The procedures used for the MBE growth have been described elsewhere. In situ experiments were performed in a JEOL 200CX electron microscope, extensively modified to give a vacuum of better than 10-9 T in the specimen region and the capacity to do in situ sample heating and deposition. Cobalt was deposited onto clean Si(100) samples by thermal evaporation from cobalt-coated Ta filaments.

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Dynamics of Nanoparticle Chain Aggregates of Carbon Under Tension

MRS Proceedings ◽

10.1557/proc-778-u4.4 ◽

2003 ◽

Vol 778 ◽

Author(s):

Rajdip Bandyopadhyaya ◽

Weizhi Rong ◽

Yong J. Suh ◽

Sheldon K. Friedlander

Keyword(s):

Mechanical Properties ◽

Carbon Black ◽

Polymer Film ◽

Elastic Behavior ◽

Small Strains ◽

Transmission Electron ◽

Chain Aggregates ◽

Nanoparticle Chains ◽

Reinforcing Filler

AbstractCarbon black in the form of nanoparticle chains is used as a reinforcing filler in elastomers. However, the dynamics of the filler particles under tension and their role in the improvement of the mechanical properties of rubber are not well understood. We have studied experimentally the dynamics of isolated nanoparticle chain aggregates (NCAs) of carbon made by laser ablation, and also that of carbon black embedded in a polymer film. In situ studies of stretching and contraction of such chains in the transmission electron microscope (TEM) were conducted under different maximum values of strain. Stretching causes initially folded NCA to reorganize into a straight, taut configuration. Further stretching leads to either plastic deformation and breakage (at 37.4% strain) or to a partial elastic behavior of the chain at small strains (e.g. 2.3% strain). For all cases the chains were very flexible under tension. Similar reorientation and stretching was observed for carbon black chains embedded in a polymer film. Such flexible and elastic nature of NCAs point towards a possible mechanism of reinforcement of rubber by carbon black fillers.

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