Materiale Plastice最新文献

{"title":"High-density Polyethylene - Expanded Perlite Composites: Structural Oriented Analysis of Mechanical and Thermomechanical Properties","authors":"M. Barczewski, A. Hejna, P. Kosmela, O. Mysiukiewicz, A. Piasecki, Kamila Sa�asi�ska","doi":"10.37358/mp.22.3.5605","DOIUrl":"https://doi.org/10.37358/mp.22.3.5605","url":null,"abstract":"\u0000As part of this work, research was carried out on the effect of the addition of expanded perlite (PR) on the mechanical and thermomechanical properties of high-density polyethylene (PE) composites. Composites containing from 1 to 10 wt% of the inorganic filler were produced. Polyethylene-based composites manufactured by twin-screw extrusion and formed in the compression molding process were subjected to mechanical, thermomechanical, and structural analyses. The structure of polymer composites and filler was analyzed using scanning electron microscopy (SEM). It has been correlated with the static tensile tests and results of dynamic thermomechanical analysis (DMA). As part of the work, several thermomechanical parameters were calculated, and the obtained results were discussed with the evaluation of interfacial adhesion based on microscopic analysis. The research showed that despite introducing a 10 wt% of particle-shaped filler, the composites show increased stiffness without noticeable deterioration in tensile strength, simultaneously reducing toughness and brittleness. The analysis of the thermomechanical properties showed the lack of significant effects of the filler influence on the polymer matrix.\u0000","PeriodicalId":18360,"journal":{"name":"Materiale Plastice","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44611604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Metal-containing Ionic Liquids as Catalyst in PET Glycolysis","authors":"Robert Țincu, A. Slabu, C. Stavarache, M. Duldner, Emeric Barth, F. Teodorescu","doi":"10.37358/mp.22.3.5612","DOIUrl":"https://doi.org/10.37358/mp.22.3.5612","url":null,"abstract":"\u0000Metal-containing ionic liquids with general formula [Rmim]+MX3- (R=n-butyl or n-lauryl; M=Zn, Cd; X=Cl, Br) were synthesised and then characterized by nuclear magnetic resonance spectroscopy and infrared spectroscopy. The catalytic activity was tested in glycolysis of poly(ethylene terephthalate) (PET) with ethylene glycol (EG) with the main product being bis-2-hydroxyethyl terephthalate (BHET). The following parameters were varied: the catalyst type, the catalyst loading and the molar ratio between PET and EG. For every reaction conversion and selectivity were calculated. All these reactions arose with high selectivity in the desired product, the conversion of PET being quasi-total.\u0000","PeriodicalId":18360,"journal":{"name":"Materiale Plastice","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45521957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CONTENTS Nr. 3 / 2022","authors":"","doi":"10.37358/mp.22.3.5600","DOIUrl":"https://doi.org/10.37358/mp.22.3.5600","url":null,"abstract":"","PeriodicalId":18360,"journal":{"name":"Materiale Plastice","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49545548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Tribology of Composite Materials Used for Manufacturing Brake Shoes","authors":"F. Bucur, A. Socalici, A. B. Berghian, C. B. Baneasa, L. Pascu","doi":"10.37358/mp.22.3.5602","DOIUrl":"https://doi.org/10.37358/mp.22.3.5602","url":null,"abstract":"\u0000The paper presents the results obtained after the tribology of composite materials with organic components intended for the manufacturing of brake shoes for motor and towed rolling stock. We analyzed the tribological behaviour of the samples of experimental composite material in comparison to the phosphorous cast iron frequently used for manufacturing brake shoes.\u0000","PeriodicalId":18360,"journal":{"name":"Materiale Plastice","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45492475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Flexural Modulus Enhancement and Minimization of Printing Time and Part Weight for PET-G, Using Taguchi-GRA-TOPSIS Techniques","authors":"Mohammed Raffic N., G. K., Rajasekaran Saminathan, Haitham M. Hadidi","doi":"10.37358/mp.22.3.5610","DOIUrl":"https://doi.org/10.37358/mp.22.3.5610","url":null,"abstract":"\u0000Fused deposition modeling (FDM) is becoming the most promised additive manufacturing (AM) process in recent years due to the evident benefits, such as high design flexibility, low cost, friendly and economically use. The current study considers an optimization of four different FDM parameters varied in three levels, as layer thickness (0.17 mm, 0.25 mm and 0.33 mm), infill density (25, 50 and 75%), shell thickness (0.8 mm, 1.2 mm and 1.6 mm) and raster angle (0o, 30o and 60o) with an objective to reduce printing time, part weight and to enhance flexural modulus using Polyethylene Terepthalate - glycol modified (PET-G) material. Mono optimization of FDM input parameters has been done using signal to noise ratio method obtained from Taguchi�s L9Orthogonal Array (OA) and multi response optimization is applied through Grey Relational Analysis (GRA) and technique of order preference similar to ideal solution (TOPSIS) techniques. The response or its criteria weightages are calculated using Shanon�s entropy and CRITIC method which gives different weightages for the considered responses. Printing time ranks top with 37% from entropy method followed by flexural modulus with 36% and part weight ranks last with 28%. Flexural modulus ranks tops with 43% followed by part weight with 29% and printing time takes last position with 28% weightage.The ranking of alternatives from GRA- entropy and GRA- CRITIC methods are similar by recommending A1B1C1D1 (0.17 mm layer thickness, 25% infill density, 0.8 mm shell thickness and 0� raster angle) but TOPSIS-entropy and TOPSIS - CRITIC methods suggested different parameter combination A2B3C1D2 (0.25 mm layer thickness,75% infill density, 0.8 mm shell thickness and 30� raster angle). From all the four different methods adopted for optimization, the parameter setting obtained from level total suggests A2B1C1D2 (0.25 mm layer thickness, 25% infill density, 0.8mm shell thickness and 30� raster angle) and completely opposite to the ranking of alternatives. The carried - out confirmation trials carried out validated the optimized settings resulted from different methods. Infill density is found to be the most significant factor as compared to other input factors over the output assessed parameters.\u0000","PeriodicalId":18360,"journal":{"name":"Materiale Plastice","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47665045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of Thermal and Thermo-mechanic Properties of Composites Based on Styrene-butadiene Copolymer (SBS)-seed Shell Particles","authors":"B. Salazar-Cruz, C. M. León-Almazán, C. E. Ramos-Galvan, J. Estrada-Martínez, J. Rivera‐Armenta","doi":"10.37358/mp.22.3.5619","DOIUrl":"https://doi.org/10.37358/mp.22.3.5619","url":null,"abstract":"\u0000Nowadays, the use of agricultural wastes is a high impact research area, due the fact that this kind of materials can provide some interesting properties to a polymer matrix. Among these materials, the seed shell are materials with no industrial applications, so it is necessary to find a use in the aim to avoid the pollution. The Styrene-butadiene copolymer (SBS) is a wide used material due it thermoplastic behavior. In present work, the inclusion of two different species of seed shell particles: (jatropha curcas seed particles (JCSP) and pistachio (PSP)) into a Styrene-butadiene copolymer (SBS) and their effect on the thermal behavior of the resulting composites have been studied. The composites were prepared by melting fussion process at different concentrations ranging from 2 to 10 phr (parts per hounded of resin). The obtained composites were characterized by means of Thermogravimetric analysis (TGA), Dynamic Mechanical Analysis (DMA) and infrared Spectroscopy (FTIR).\u0000","PeriodicalId":18360,"journal":{"name":"Materiale Plastice","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49314396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Antitumor Effect and Pharmacological Mechanism of Paclitaxel-loaded Silk Fibroin Nanomaterials on H22 Subcutaneous Tumor Model of Mouse Hepatoma","authors":"Shengxin Zhao","doi":"10.37358/mp.22.3.5606","DOIUrl":"https://doi.org/10.37358/mp.22.3.5606","url":null,"abstract":"\u0000This work was developed to analyze the adoption of paclitaxel-loaded silk fibroin nanoparticles (SFNPs) in subcutaneous transplanted tumor model of mouse hepatoma to explore its anti-tumor effect. Twenty-five specific pathogen-free (SPF) mice were selected to construct a subcutaneous tumor model of liver cancer, and they were randomly rolled into control group, group A, group B, group C, and group D, with five mice in each group. The silk fibroin was mixed with an organic solvent to prepare a suspension, and the SFNPs were prepared through centrifugation, ultrasound, and other methods. The paclitaxel-loaded SFNPs were prepared by mixing paclitaxel and silk fibroin aqueous solution, centrifuging, washing, and dispersing. Then, the five groups of mice were intervened by different dosage regimens to analyze the changes of various indicators. As a result, the prepared nanoparticles had uniform particle size, uniform distribution, no adhesion, and the average particle size was less than 500 nm. The tumor volume of mice in groups C and D on the 7th, 9th, and 13th days of administration were dramatically smaller than those in the control group, group A, and group B (P [ 0.05). And the tumor volume (154.49 � 9.65 mm3) of mice in group D on the 13th day of administration was dramatically smaller than that in group C (167.79 � 9.72 mm3) (P [ 0.05). The tumor mass (0.89 � 0.14 g, 0.54 � 0.13 g, and 0.46 � 0.11 g) of mice in groups B, C, and D was dramatically smaller than that in the control group and group A (1.23 � 0.12 g, 1.24 � 0.11 g) (P [ 0.05), and that of group D was dramatically smaller than groups B and C (P [ 0.05). The apoptosis rates of tumor cells in groups C and D (46.38%, 48.23%) were greatly superior to those in the control group (16.7%), group A (21.33%), and group B (35.6%) (P [ 0.05), and that of group D was greatly superior to that in group C (P [ 0.05). In summary, paclitaxel-loaded SFNPs can effectively improve the targeting effect and bioavailability of drugs in the treatment of liver cancer, thereby improving the efficacy, and had a good application prospect.\u0000","PeriodicalId":18360,"journal":{"name":"Materiale Plastice","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45244298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An Optimization Study on Material Selection for FRPCs in Multi Layered Armour System Through Hybrid MCDM Approach and Numerical Simulation","authors":"D. K. Gowda, R. Bhat, S. Rajole","doi":"10.37358/mp.22.3.5616","DOIUrl":"https://doi.org/10.37358/mp.22.3.5616","url":null,"abstract":"\u0000Fiber reinforced polymer composites (FRPCs) are considered as core structure in Multi layered armour systems (MAS) to take advantage of maximum energy absorption, mobility and cost criteria design. In this article, based on the problem defining attribute�s optimal material selection in FRPCs determined by Multiple criteria decisions making (MCDM) approach for considered alternative materials from polymer resin, synthetic and natural fiber. Attribute�s weightage and alternatives priority rank were determined through Fussy-Analytical hierarchy process (F-AHP) and Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) method. Obtained rank was compared with Preference selection index (PSI) an another MCDM method, for better computational conformity. Selected materials from MCDM approach, simulated for energy absorption ability and damage after impact were studied by considering Cowper-Symonds constitutive materials model using 3D macro shell analysis. Various impact velocities were considered from 3 to 50 m/s for rigid steel impactor directed towards the deformable plate. Parameter like Residual kinetic energy, Residual velocity, Energy absorption ratio after impact were studied numerically. Simulation results in terms of specific energy absorption were compared with the rank obtained in MCDM approach. Among the polymers considered epoxy, polyurethane and polyester found better choice. In fibers hemp and basalt found better materials choice for heterogenous FRPCs design in ballistic armour.\u0000","PeriodicalId":18360,"journal":{"name":"Materiale Plastice","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47042332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental Study Regarding the Mechanical Behavior of PPR Pipes","authors":"I. Ramadan, M. Tănase","doi":"10.37358/mp.22.2.5582","DOIUrl":"https://doi.org/10.37358/mp.22.2.5582","url":null,"abstract":"\u0000The PPR pipes are more and more used in different industrial applications, due to their multiple advantages compared with the conventional metallic pipes. The experimental study presented in this article, was conducted in two directions, analyzing the behavior of welded PPR pipes and also the behaviour of unwelded PPR pipes exposed to different aggressive environments. In the second investigation, the PPR pipes were immersed in different chemically active environments as gasoline, sodium hypochlorite (NaClO), water + sodium hypochlorite (NaClO)-20% NaClO volume concentration, for a period of 3 weeks (21 days), in order to reveal the influence on the mechanical properties of the PPR pipes. The examination was made by using both visual inspection and tensile and bending tests. The investigations made have led to the conclusion that the presence of sodium hypochlorite do not affect the mechanical properties of PPR pipes, unlike the gasoline which significantly decrease the yield stress value. For the welded PPR pipes it was found that they failed at pressures of about 180 bar. Although the optimal welding parameters, recommended by the manufacturer, were modified (maintenance time), the only sample that failed in the welded joint was the one with the most acute misalignment and the shortest welding time. However, the sample withstood high pressures, reaching about 55% of the burst pressures obtained for welded pipes with the recommended welding parameters. The need to conduct such studies derived from the fact that most of the information regarding the behavior of PPR pipes is provided by the manufacturers and there is insufficient information in the scientific literature.\u0000","PeriodicalId":18360,"journal":{"name":"Materiale Plastice","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43276006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of Composite Bar Damping from Dammar Hybrid Resin Reinforced with Natural Fibers","authors":"A. Bolcu, M. Stănescu, D. Bolcu, I. Ciuca, C. Miriţoiu, M. Ivan","doi":"10.37358/mp.22.2.5589","DOIUrl":"https://doi.org/10.37358/mp.22.2.5589","url":null,"abstract":"\u0000At the moment, the tendency in the composites field, is to use natural resins and fibers to obtain �environmental friendly� materials, that are compostable and biodegradable. In this paper there is an experimental study of the depletion capacity of the vibration from the composite beams, using the hardener made of cotton, flax, hemp, silk textile and the three types of the Dammar hybrid resin matrix. The damping factor and the eigenfrequency of the vibrations was determined experimentally for these bars. Based on the acquired results, the dynamic elasticity modulus and the loss factor were calculated, for each composite material studied.\u0000","PeriodicalId":18360,"journal":{"name":"Materiale Plastice","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48742537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}