scholarly journals Tough Hydrogels Based on Maleic Anhydride, Bulk Properties Study and Microfiber Formation by Electrospinning

Polymers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 972
Author(s):  
Faiza Bettahar ◽  
Fadila Bekkar ◽  
Leyre Pérez-Álvarez ◽  
Mohammed Issam Ferahi ◽  
Rachid Meghabar ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Wound Healing ◽  
Maleic Anhydride ◽  
Swelling Behavior ◽  
Bulk Properties ◽  
Swelling Capacity ◽  
Maleic Anhydride Copolymers

Hydrogels present a great number of advantages, such as their swelling capacity or their capability to mimic tissues, which make them very interesting biomaterials. However, one of their main disadvantages is their lack of good mechanical properties, which could limit some of their applications. Several strategies have been carried out to develop hydrogels with enhanced mechanical properties, but many of the suggested synthetic pathways to improve this property are expensive and time consuming. In this work, we studied an easy synthetic path to produce tough hydrogels based on different maleic anhydride copolymers crosslinked with polyethylenglycol. The effect of the comonomers in the mechanical properties has been studied, their excellent mechanical properties, good swelling behavior and thermal stability being remarkable. In addition, in order to evaluate their possible applications as scaffolds or in wound healing applications, microsized fibers have been fabricated by electrospinning.

scholarly journals Structure and Properties of Polyoxymethylene/Silver/Maleic Anhydride-Grafted Polyolefin Elastomer Ternary Nanocomposites

Polymers ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 1954
Author(s):  
Yang Liu ◽  
Xun Zhang ◽  
Quanxin Gao ◽  
Hongliang Huang ◽  
Yongli Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Maleic Anhydride ◽  
Ag Nanoparticles ◽  
Decomposition Temperature ◽  
Melt Mixing ◽  
Elongation At Break ◽  
Maximum Value ◽  
Polyolefin Elastomer ◽  
Local Defects

In the present study, silver (Ag) nanoparticles and maleic anhydride-grafted polyolefin elastomer (MAH-g-POE) were used as enhancement additives to improve the performance of the polyoxymethylene (POM) homopolymer. Specifically, the POM/Ag/MAH-g-POE ternary nanocomposites with varying Ag nanoparticles and MAH-g-POE contents were prepared by a melt mixing method. The effects of the additives on the microstructure, thermal stability, crystallization behavior, mechanical properties, and dynamic mechanical thermal properties of the ternary nanocomposites were studied. It was found that the MAH-g-POE played a role in the bridging of the Ag nanoparticles and POM matrix and improved the interfacial adhesion between the Ag nanoparticles and POM matrix, owing to the good compatibility between Ag/MAH-g-POE and the POM matrix. Moreover, it was found that the combined addition of Ag nanoparticles and MAH-g-POE significantly enhanced the thermal stability, crystallization properties, and mechanical properties of the POM/Ag/MAH-g-POE ternary nanocomposites. When the Ag/MAH-g-POE content was 1 wt.%, the tensile strength reached the maximum value of 54.78 MPa. In addition, when the Ag/MAH-g-POE content increased to 15wt.%, the elongation at break reached the maximum value of 64.02%. However, when the Ag/MAH-g-POE content further increased to 20 wt.%, the elongation at break decreased again, which could be attributed to the aggregation of excessive Ag nanoparticles forming local defects in the POM/Ag/MAH-g-POE ternary nanocomposites. Furthermore, when the Ag/MAH-g-POE content was 20 wt.%, the maximum decomposition temperature of POM/Ag/MAH-g-POE ternary nanocomposites was 398.22 °C, which was 71.39 °C higher than that of pure POM. However, compared with POM, the storage modulus of POM/Ag/MAH-g-POE ternary nanocomposites decreased with the Ag/MAH-g-POE content, because the MAH-g-POE elastomer could reduce the rigidity of POM.

Recycled High Density Polyethylene/Ethylene Vinyl Acetate (RHDPE/EVA)/Taro (Colocasia esculenta) Composites: The Effect of Caprolactam-Maleic Anhydride on Tensile Properties and Swelling Behaviour

2014 ◽  
Vol 695 ◽  
pp. 56-59
Author(s):  
A.R.H. Fatimah ◽  
A.Ghani Supri ◽  
Z. Firuz
Keyword(s):  
Mechanical Properties ◽  
Maleic Anhydride ◽  
Tensile Properties ◽  
Ethylene Vinyl Acetate ◽  
Swelling Behavior ◽  
Thermoplastic Composites ◽  
Weak Interface ◽  
Swelling Behaviour ◽  
Hydrophobic Polymer ◽  
Natural Fillers

Natural fillers fulfill most requirements needed to replace synthethic fillers in thermoplastic composites. However, some disadvantages appear when natural fillers are used for composites. The poor compatibility between the hydrophilic fillers with the hydrophobic polymer matrix leads to a weak interface and hence, thus poor mechanical properties. In this research, caprolactam-maleic anhydride (CL-MAH) was used as the compatibilizer (6wt%) and the effect of compatibilizer on the composites was studied on mechanical properties and swelling behavior of RHDPE/EVA/Taro. The tensile strength for RHDPE/EVA/Taro composites decreased while increasing the filler loadings but adding caprolactam-maleic anhydride in the composite significantly improved the tensile properties. The swelling behavior results indicated that increased in Taro filler and addition of CL-MAH will increase the mass swell of the composites.

PP/Wasted PET Fabric Composites Compatibilized by two Different Methods: Mechanical Properties, Morphology and Thermal Stability

2012 ◽  
Vol 476-478 ◽  
pp. 730-733
Author(s):  
Zhi Dan Lin ◽  
Zi Xian Guan ◽  
Neng Sheng Liu ◽  
Zheng Jun Li
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Maleic Anhydride ◽  
Injection Molding ◽  
Methyl Methacrylate ◽  
Pet Fabric ◽  
Fabric Composites ◽  
Different Types ◽  
Thermal Stability Of

The composites of polypropylene (PP) and wasted PET fabric (WF) were prepared by extrusion blending and injection molding, and then, the interface of the composites was modified by two different types of compatibilizers, i.e., maleic anhydride grafted PP (PP-g-MA) and the mixture of methyl methacrylate (MMA) and styrene (St). The mechanical properties, morphology and thermal stability of these composites were studied.

Viscoelasticity of Asphalts Modified with SEBS Copolymers Functionalized with Various Amounts of Maleic Anhydride

2009 ◽  
Vol 82 (2) ◽  
pp. 244-270 ◽  
Author(s):  
M. A. Vargas ◽  
N. N. López ◽  
M. J. Cruz ◽  
F. Calderas ◽  
O. Manero
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Maleic Anhydride ◽  
Reactive Polymers ◽  
Thermal Stability Of

Abstract It is known that the microstructure of polymer-modified asphalts (PMA) depends strongly of the characteristics of the polymer. The modifier polymer improves the mechanical properties of pure asphalt when used in paved roads. In this work, asphalt is modified using reactive polymers obtained via functionalization of styrene-ethylene/butylene-styrene (SEBS) copolymers in solution using various amounts of benzoil peroxide (BPO) as initiator and maleic anhydride (MAH). The resulting functionalized copolymer (SEBS-g-MAH) with variable amounts of grafting (variable reactivity) is blended with the asphalt at small contents (2–4 wt. %). The amount of MAH grafting was determined by FTIR, 1HNMR, GPC, DSC and by titration with KOH, and this amount is readily correlated with the improvement of the mechanical properties and thermal stability of the asphalt. In addition, the limit of the polymer-asphalt compatibility is determined for these systems.

Flame Retardancy, Thermal Stability, and Mechanical Properties of Sisal Fiber/Organoclay/Polypropylene Composites

2011 ◽  
Vol 410 ◽  
pp. 47-50 ◽  
Author(s):  
Wichuda Chanprapanon ◽  
Nitinat Suppakarn ◽  
Kasama Jarukumjorn
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Maleic Anhydride ◽  
Flame Retardancy ◽  
Interfacial Adhesion ◽  
Sisal Fiber ◽  
Melt Blending ◽  
Polypropylene Composites ◽  
Pp Composites ◽  
Thermal Stability Of

Composites based on polypropylene (PP) and sisal fiber (SF) were prepared by melt blending. Sisal fiber content was 30 phr. Organoclay (OMMT; Cloisite®30B) (1-7 phr) was incorporated into the composites. In addition, maleic anhydride grafted polypropylene (MAPP) was used as a compatibilizer to enhance the interfacial adhesion between PP matrix and sisal fiber and also to improve the dispersion of the organoclay in PP matrix. The addition of OMMT had insignificantly affected mechanical properties of SF/PP composites. However, flame retardancy and thermal stability of SF/PP composites were improved dramatically with the presence of OMMT.

Study on Properties of Modified Porous Starch/ Natural Rubber Composite

2014 ◽  
Vol 941-944 ◽  
pp. 294-300 ◽  
Author(s):  
Xue Mei Pan ◽  
Min Wu ◽  
Si Dong Li ◽  
Lin Fang ◽  
Zhi Feng Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Natural Rubber ◽  
Water Resistance ◽  
Natural Rubber Latex ◽  
Swelling Behavior ◽  
Modified Starch ◽  
Rubber Latex ◽  
Solvent Resistance ◽  
Rubber Composite

The porous starch was modified by xanthates, and the starch/natural rubber composite was prepared by blending the modified starch with natural rubber latex. The morphology, thermal stability, swelling behavior and mechanical properties of the composite were investigated. Morphology studies by SEM showed that the modified porous starch were homogeneously dispersed in NR matrix. The composite has higher solvent resistance and lower water resistance after adding modified porous starch. The mechanical properties of composite are improved significanly with the increase of modified porous starch.

scholarly journals Study of Mechanical Properties of Composite Material Based on Polypropylene and Vietnamese Rice Husk Filler

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Thanh Duy Tran ◽  
Mao Dang Nguyen ◽  
C. N. Ha Thuc ◽  
H. Ha Thuc ◽  
Tai Dang Tan
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Maleic Anhydride ◽  
Rice Husk ◽  
Renewable Resources ◽  
Mechanical Parameters ◽  
Narrow Size Distribution ◽  
New Materials ◽  
Rice Husk Flour ◽  
Properties Of Composites

Nowadays, the consideration of the environmental impact of polymer products has led to the development of new materials combining polymers and renewable resources. Among these materials, biocomposites have been extensively studied. In the current work, we focused on preparation of biocomposites based on polypropylene and Vietnamese rice husk flour having narrow size distribution (100–125 μm) with the presence of maleic anhydride grafted polypropylene as a compatibilizer. The effect of rice husk flour and maleic anhydride grafted polypropylene content on properties of composites was investigated. The results showed that mechanical parameters as well as thermal stability were significantly improved at relatively high rice husk content by the addition of maleic anhydride grafted polypropylene.

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