Materiale Plastice最新文献_第8页

Physical and Mechanical Properties Analysis of Wood-waste Composite Panels 废木复合板的物理力学性能分析

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2022-07-01 DOI: 10.37358/mp.22.2.5585

Imad Rezakalla-Antypas, A. Dyachenko

引用次数: 0

Crack Propagation for Glass Fiber Reinforced Laminates Containing Flame Retardant: Based on Single-Edge Tensile Loading 含阻燃剂玻璃纤维增强层压板的裂纹扩展：基于单边拉伸载荷

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2022-07-01 DOI: 10.37358/mp.22.2.5588

Zhao Changfang, Ren Rui, Wei Yi, Yang Guang, He Bin, Zhang Kebin, Zhong Jianlin

{"title":"Crack Propagation for Glass Fiber Reinforced Laminates Containing Flame Retardant: Based on Single-Edge Tensile Loading","authors":"Zhao Changfang, Ren Rui, Wei Yi, Yang Guang, He Bin, Zhang Kebin, Zhong Jianlin","doi":"10.37358/mp.22.2.5588","DOIUrl":"https://doi.org/10.37358/mp.22.2.5588","url":null,"abstract":"\u0000Research on crack propagation for fiber reinforced composites containing flame retardant is rare. The micro-cracks propagation is a reason for delamination and debonding failure of fiber reinforced composites. To study the crack propagation of continuous glass fiber reinforced epoxy resin laminates that contained ammonium polyphosphate flame retardant (GFRP-APP), the quasi-static single-edge tensile loading (SETL) experiments for the end-notched GFRP-APP specimens were carried out by MTS universal electronic testing machine. The crack propagation of the end-notched 90� GFRP-APP specimen includes two types, both of which belong to opening type (mode I). Namely, one type is mode I multi-cracks propagation without preexisting crack, and the other is mode I fiber bridge propagation with preexisting crack. The intralaminar fracture toughness along fiber direction of GFRP-APP is approximately 8.4 N/mm, which is calculated by area method. The opening displacement-tensile force curves can be divided into three stages for 90� GFRP-APP specimen without crack, i.e., crack gestation, crack birth and crack propagation. However, the 90� GFRP-APP specimen with crack not contains the crack birth stage. Additionally, the microscopic morphology for the fracture face of pure epoxy resin and GFRP-APP, and the phase analysis for GFRP-APP were performed by scanning electron microscope (SEM), X-ray diffraction (XRD) and energy dispersive spectrometer (EDS). As a conclusion, the pores and interfaces in materials were the guiding factors of micro-crack propagation, and the ammonium polyphosphate flame retardant particle contributed extra interfaces.\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":"44692503","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}

引用次数: 2

The Effects of Fresh Detox Juices on Color Stability of Resin Adhesive Systems 新鲜排毒果汁对树脂胶粘剂颜色稳定性的影响

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2022-07-01 DOI: 10.37358/mp.22.2.5587

M. Ayar

{"title":"The Effects of Fresh Detox Juices on Color Stability of Resin Adhesive Systems","authors":"M. Ayar","doi":"10.37358/mp.22.2.5587","DOIUrl":"https://doi.org/10.37358/mp.22.2.5587","url":null,"abstract":"\u0000The purpose of the present research was to assess the effect of three different fresh detox juices on the color stability of the resin composite with three different adhesive systems. Disc-shaped resin composite specimens were prepared. Composite discs were randomly divided into 3 subgroups according to the adhesive system (Adper EasyOne, BondForce, Clearfil QuickBond), adhesive system was applied to the upper surfaces of the composite discs according to the manufacturer s instructions. The first color measurements were made with a spectrophotometer after the composite discs were kept in water for 24 hours. Samples in each group were divided into 4 subgroups according to the immersion solution (n=10; brands, water). The samples, which were kept in respective detox juices, were kept for 10 minutes twice a day, at other times they were kept in distilled water. Second color measurements were performed 30 days later. Data were analyzed with two-way ANOVA and Tukey HSD tests. According to the two-way analysis of variance, the adhesive system does not affect the color change significantly (p=0.773), but the detox juices has a significant effect on the color change (p=0.01). Fresh detox juices may adversely affect the color stability of adhesive systems, regardless of their color, but this effect may not be expected to be clinically observable.\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":"42517468","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}

引用次数: 0

Overview on the Key Figures with Impact on the Circular Economy Through the Life Cycle of Plastics 塑料生命周期对循环经济影响的关键人物综述

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2022-07-01 DOI: 10.37358/mp.22.2.5594

I. Vlad, E. Toma

{"title":"Overview on the Key Figures with Impact on the Circular Economy Through the Life Cycle of Plastics","authors":"I. Vlad, E. Toma","doi":"10.37358/mp.22.2.5594","DOIUrl":"https://doi.org/10.37358/mp.22.2.5594","url":null,"abstract":"\u0000Intended to draw a frame of the impact of plastics usage and the role of the circular economy, this paper relied on specific literature, data from different studies, case studies, reports and databases existing on the research area. Being produced at low costs and used in a wide range of fields, plastics has been confirmed as one of the most impactful inventions for human. Recently, during the pandemic years, plastics has gotten multiple usages, such as keeping a hygienic sanitary environment facing the critical situations, with a highly increased role in the fight against the SARS-COVID-19 crisis. It is also well known that plastics presents risks arising from its production flow, linked to a huge degree of massive pollution with high impact on the environment. Plastic waste exposed to the environment generated problems and it is of huge concern for all forms of life. As plastics products are present all around the world, there is an increasing statement to one-use plastics in the environment. Thus, it is urge to take actions for managing this situation as appropriate, to protect the environment and reduce the consumption of plastics, which can be achieved by developing and sustain the circular economy, as a new research field to explore. Through this paper we intended to emphasize the importance that, both theoretical contribution and practical measures, have on the production, the use and recycling of plastics and on the circular economy.\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":"42112598","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}

引用次数: 0

High-voltage Electrostatic Separation and Equivalent Reuse of Plastics Used in Passenger Vehicle 乘用车用塑料的高压静电分离及等效再利用

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2022-07-01 DOI: 10.37358/mp.22.2.5595

Hongshen Zhang, Yingjie Zhao, Hongfei Zheng

引用次数: 1

Formulation and Characterisation of Pullulan Acetate Nanoparticles Loaded with 5-Fluorouracil 负载5-氟尿嘧啶的醋酸普鲁兰纳米颗粒的制备与表征

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2022-07-01 DOI: 10.37358/mp.22.2.5593

Ramona-Daniela Păvăloiu, Fawzia Sha At, M. Eremia, Cristina Hlevca, M. Petrescu, Mousa Sha�at, Claudia Sevcenco

{"title":"Formulation and Characterisation of Pullulan Acetate Nanoparticles Loaded with 5-Fluorouracil","authors":"Ramona-Daniela Păvăloiu, Fawzia Sha At, M. Eremia, Cristina Hlevca, M. Petrescu, Mousa Sha�at, Claudia Sevcenco","doi":"10.37358/mp.22.2.5593","DOIUrl":"https://doi.org/10.37358/mp.22.2.5593","url":null,"abstract":"\u0000This study was geared to analyze the preparation methods of pullulan acetate-based nanoparticles loaded with 5-fluorouracil, as well as the potential of pullulan as a biopolymer matrix for obtaining nanoparticles applied in the delivery of anticancer drugs (5-FU). Various methods were used to produce pullulan acetate-based nanoparticles loaded with 5-FU, including nanoprecipitation, modified nanoprecipitation, and double emulsion. Pullulan was previously chemically modified with acetic anhydride, dimethylformamide and pyridine, and yielded pullulan acetate. Pullulan was made using the Aureobasidium pullulans strain through a fermentation procedure. UV-Vis Spectro-photometric and dynamic light scattering (DLS) methods were used to assess entrapment effectiveness, size, and polydispersity index (PDI) of pullulan acetate-based nanoparticles loaded with 5-FU. Based on the properties of the nanoparticles obtained, the optimum preparation method was chosen. The maximum entrapment efficiency was found in pullulan acetate nanoparticles loaded with 5-FU generated by a double emulsion method. The mean hydrodynamic size and PDI of all nanoparticles were adequate. The best formulation showed faster 5-FU release profile in acid phosphate-buffered saline (pH 5) than in phosphate-buffered saline pH 7.4. According to the findings, pullulan derivatives have a great potential for producing nanoparticles that might be used to deliver anticancer medicines.\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":"46478458","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}

引用次数: 0

Development and Evaluation of Polymer Drug Delivery System (PDDS) for Delivery of Boswellia seratta 用于Boswellia seratta递送的聚合物药物递送系统（PDDS）的开发与评价

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2022-07-01 DOI: 10.37358/mp.22.2.5583

Jebarani Joshua David, R. Kandasamy, Sirshendu Chatterjee

{"title":"Development and Evaluation of Polymer Drug Delivery System (PDDS) for Delivery of Boswellia seratta","authors":"Jebarani Joshua David, R. Kandasamy, Sirshendu Chatterjee","doi":"10.37358/mp.22.2.5583","DOIUrl":"https://doi.org/10.37358/mp.22.2.5583","url":null,"abstract":"\u0000Boswellia seratta (BS) is the best herbal medicine to treat Rheumatoid Arthritis (RA), due to its anti-inflammatory and anti-arthritic activity. Delivering BS through an oral drug delivery system has been in effective, because of its enzymatic degradation within the Gastro-Intestinal (GI) tract. In this paper, we develop a gastro retentive approach for delivering BS to avoid high hepatic ﬁrst pass metabolism and optimized buccal patch based on the drug delivery characteristics. There are seven different formulated buccal films of BS that were prepared by the solvent casting method, using mucoadhesive polymers, Poly Vinyl Alcohol (PVA), and Sodium Carboxy Methyl Cellulose (SCMC). These with drug formulation can be represented as PCB. The prepared films were evaluated by various physicochemical properties and characterization studies. Results obtained from physico-chemical properties, in-vitro and ex-vivo studies among all seven patches, PCB5 shows better drug-releasing characteristics. This was further confirmed by FT-IR and XRD characterization studies. Also, the data was statistically analysed using Analysis of Variance (ANOVA).\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":"49052419","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}

引用次数: 0

The Influence of Temperature on Rheological Properties of Three Root Canal Sealers 温度对三种根管封闭剂流变性能的影响

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2022-07-01 DOI: 10.37358/mp.22.2.5596

Milica(Premovic) Cvjeticanin, D. Zorica, V. Krstonošić, Miroslav S Hadnadjev, I. Stojanac, B. Ramić, M. Drobac, L. Petrovic, T. Atanacković

{"title":"The Influence of Temperature on Rheological Properties of Three Root Canal Sealers","authors":"Milica(Premovic) Cvjeticanin, D. Zorica, V. Krstonošić, Miroslav S Hadnadjev, I. Stojanac, B. Ramić, M. Drobac, L. Petrovic, T. Atanacković","doi":"10.37358/mp.22.2.5596","DOIUrl":"https://doi.org/10.37358/mp.22.2.5596","url":null,"abstract":"\u0000Purpose was to determine the viscoelastic properties of three root canal sealers as a function of temperature, time and frequency using dynamic oscillatory measurements. Methods: Measurements were performed on the dynamic oscillatory rheometer set to temperatures: 25�C, 35�C, 40�C and 65�C. Stress sweep and frequency sweep tests were used in order to determine storage moduli G�, loss moduli G�� and complex viscosity η*. Results Higher values of storage compared to loss moduli indicate the more pronounced solid-like behavior of tested materials. EndoREZ showed the highest values of G� and G�� moduli at all temperatures. With temperature increase the G� and G�� moduli of Sealapex and EndoREZ increased while the moduli of AH Plus decreased. With frequency increase all materials showed viscosity decrease exhibiting non-Newtonion, shear-thinning behavior. With temperature increase AH Plus demonstrated viscosity decrease, while the viscosity of Sealapex and EndoREZ increased. Clinical significance: All tested materials were temperature, time and frequency dependent and this dependency varied between them. The obtained results may be used to predict the rheological behavior of root canal sealers in different temperature conditions, thus helping as to estimate optimal handling characteristics for specific clinical applications.\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":"48395394","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}

引用次数: 0

Determination of Stress Concentration Effects Using Micro-Digital Image Correlation Techniques in PMMA Specimens 应用显微数字图像相关技术测定PMMA试样中的应力集中效应

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2022-07-01 DOI: 10.37358/mp.22.2.5591

C. Stochioiu, Victor-Marian Marinescu, D. Tudose, A. Hadar

引用次数: 0

Synthesis and Characterization of Novel Nano Six-arms of (polylactide-dipentaerythritol)-block-N-hydroxyethyl Acrylamide and N,N-dimethylamino Ethyl Methacrylate Biocopolymers by Atom Transfer Radical Polymerization 原子转移自由基聚合合成新型（聚乳酸-二季戊四醇）-嵌段-N-羟乙基丙烯酰胺和N，N-二甲基氨基乙基甲基丙烯酸酯纳米六臂生物聚合物及其表征

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2022-07-01 DOI: 10.37358/mp.22.2.5584

Baqer A. Al-Mayyahi, H. Al-Lami, A. Haddad

{"title":"Synthesis and Characterization of Novel Nano Six-arms of (polylactide-dipentaerythritol)-block-N-hydroxyethyl Acrylamide and N,N-dimethylamino Ethyl Methacrylate Biocopolymers by Atom Transfer Radical Polymerization","authors":"Baqer A. Al-Mayyahi, H. Al-Lami, A. Haddad","doi":"10.37358/mp.22.2.5584","DOIUrl":"https://doi.org/10.37358/mp.22.2.5584","url":null,"abstract":"\u0000Novel block biocopolymers were made by copolymerizing the prepared polylactide-dipenta-erythritol macromonomer with two different monomers, N-hydroxyethyl acrylamide (HEAA) and N,N-dimethylamino ethyl methacrylate (DMAEMA), with an activator generated by atom transfer radical polymerization (ATRP), to have a different duplicating unit of 10, 25, 50, and 100. ATRP employs a copper(I) bromide (CuBr) catalyst system with N, N, N′, N′′, N′′-pentamethyl diethylenetriamine (PMDETA). Different spectroscopic and analytical methods used for characterization of the prepared biocopolymers, such as FT-IR, 1H NMR, 13C NMR, and GPC, showed that they had narrow dispersity with controllable molecular weight and were accompanied by nanostructures as examined by SEM technique on all biocopolymers, confirming the correctness of the expected structures of biocopolymers. The shape and size of the produced polymeric nanoparticles were determined using a scanning electron microscope (SEM), and they were developed using the Image-J application.\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":"46013789","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}

引用次数: 0