有机高分子材料期刊(英文)最新文献

Lactic Acid-Sustainable Raw Material for Biodegradable Hot Melt Adhesive: Review 生物可降解热熔胶的乳酸可持续原料研究进展

有机高分子材料期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/ojopm.2022.123003

Ravindra V. Gadhave

引用次数: 0

Synthesizing Self-Crosslinking Waterborne Polyurethane-Silanol Dispersion for Waterproofing Application 防水用自交联水性聚氨酯-硅醇分散体的合成

有机高分子材料期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/ojopm.2022.121001

H. Pandya, P. Mahanwar

引用次数: 0

Degradation of Polymer & Elastomer Exposed to Chlorinated Water—A Review 聚合物和弹性体暴露于氯化水中的降解研究综述

有机高分子材料期刊(英文) Pub Date : 2021-01-01 DOI: 10.4236/OJOPM.2021.111001

N. Samarth, P. Mahanwar

{"title":"Degradation of Polymer & Elastomer Exposed to Chlorinated Water—A Review","authors":"N. Samarth, P. Mahanwar","doi":"10.4236/OJOPM.2021.111001","DOIUrl":"https://doi.org/10.4236/OJOPM.2021.111001","url":null,"abstract":"In water industry, the chlorine is mostly used as a disinfectant agent. The chlorine present in potable water as a disinfectant has been reported to reduce the lifetime of contact polymeric material. This occurs in polymer pipes and it is now very common in plumbing and other parts of the drinking water distribution system. For more than 50 years, Polymer & Elastomeric materials have been used ubiquitously in drinking water distribution systems. Polymer & Elastomeric materials have successfully been used in a variety of applications ranging from rubber gaskets, to valves, to hydrants, to fittings. Polymer & Elastomers that degrade more quickly than expected create service problems, make it difficult for utilities to cost efficient plan preventive maintenance programs, and negatively affect customer relations. This review paper gives an insight idea to a reader about the selection of proper polymer & elastomer and predicting its performance in chlorinated water. Also the mechanism of degradation of Polymer & elastomer in chlorine environment and some model of life expectancy of in-service of Polymer & elastomer in various conditions and parameter in chlorinated water were discussed. and 408C for durations up to 1200 h has been studied by IR spectrophotometry, tensile testing, melt rheometry, and grafted chlorine titration. IR revealed a carbonyl growth indicating that DOC induces PE oxidation. Rheometry revealed the predominance of chain scissions, presumably linked to hydroperoxide decomposition. Tensile testing revealed an embrittlement process when the weight average molar mass MW approaches a critical value of 70 kg mol21, which agrees with a previous study of PE thermooxidation.","PeriodicalId":64141,"journal":{"name":"有机高分子材料期刊(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70488506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

Metallocene Catalyzed Homopolymerization of Propylene with a C2 Symmetric Isospecific Zirconecene/MMAO Catalysts under Different Polymerization Conditions 不同聚合条件下茂金属催化C2对称异比锆烯/MMAO催化剂的丙烯均聚反应

有机高分子材料期刊(英文) Pub Date : 2020-07-22 DOI: 10.4236/ojopm.2020.103003

Benard Oloo Nyangoye, Benard Odhiambo Obondo

{"title":"Metallocene Catalyzed Homopolymerization of Propylene with a C2 Symmetric Isospecific Zirconecene/MMAO Catalysts under Different Polymerization Conditions","authors":"Benard Oloo Nyangoye, Benard Odhiambo Obondo","doi":"10.4236/ojopm.2020.103003","DOIUrl":"https://doi.org/10.4236/ojopm.2020.103003","url":null,"abstract":"In this \u0000work, homopolymerization of propylene for synthesis of different molecular \u0000weights polypropylene was done using an isospecific metallocene catalyst by \u0000changing the polymerization conditions such as Al/Zr (Aluminium/Zirconium) \u0000ratio, temperature, pressure and polymerization time. The effects of the \u0000polymerization conditions on the molecular weight and other polymer properties \u0000have been discussed according to the results obtained. The results indicate \u0000that the activity of polymerization increased with increasing the Al/Zr mole \u0000ratio and reached a maximum value at a ratio of 2000. In relation to the mole \u0000ratio, the molecular weight also followed the same trend. The activity was also \u0000seen to increase with increase in temperature. The molecular weight increased \u0000with increasing the polymerization time at both 0°C and 25°C, but reduced with increase in time at 40°C. The increase of pressure also increased activity but lowered the \u0000molecular weight, indicating β-H elimination to the monomer.","PeriodicalId":64141,"journal":{"name":"有机高分子材料期刊(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48594152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bombyx Mori Chitosan Nanoparticles: Synthesis and Properties 家蚕壳聚糖纳米粒子的合成与性能

有机高分子材料期刊(英文) Pub Date : 2019-10-30 DOI: 10.4236/ojopm.2019.94004

R. Milusheva, S. Rashidova

引用次数: 6

In Situ Synthesis of Graphene@cuprous Oxide Nanocomposite Incorporated Marine Antifouling Coating with Elevated Antifouling Performance 原位合成Graphene@cuprous提高防污性能的氧化物纳米复合材料船用防污涂料

有机高分子材料期刊(英文) Pub Date : 2019-07-29 DOI: 10.4236/ojopm.2019.93003

J. Gu, Lei Li, Danchun Huang, Lei Jiang, Liu Liu, Fengyu Li, Ai-min Pang, Xiang Guo, Bowen Tao

{"title":"In Situ Synthesis of Graphene@cuprous Oxide Nanocomposite Incorporated Marine Antifouling Coating with Elevated Antifouling Performance","authors":"J. Gu, Lei Li, Danchun Huang, Lei Jiang, Liu Liu, Fengyu Li, Ai-min Pang, Xiang Guo, Bowen Tao","doi":"10.4236/ojopm.2019.93003","DOIUrl":"https://doi.org/10.4236/ojopm.2019.93003","url":null,"abstract":"In this paper, graphene@cuprous oxide (rGO@Cu2O) \u0000nanocomposite was designed and prepared with graphene oxide, CuSO4, \u0000NaOH and L-ascorbic acid via an in-situ reaction process, and the as-prepared rGO@Cu2O nanocomposite was \u0000characterized by XRD, FT-IR, Raman spectroscopy, XPS, SEM-EDS and TEM. The \u0000results reveal that the rGO@Cu2O nanocomposite is of homogeneous \u0000distribution, and the Cu2O nanoparticles adsorbed on graphene sheets \u0000are with a fairly uniform size of 2.3 nm. The rGO@Cu2O/acrylic resin \u0000self-polishing marine antifouling paint with functional surfaces was also \u0000prepared in this work, and a series of measurements were carried out for the \u0000obtained product. The WCAs of paint is up to 113°, and the adhesive force is \u0000averaged to 3.69 MPa. After being immersed into seawater, the whole bared panels \u0000show an abundant growth of marine organisms within 90 days, but the rGO@Cu2O \u0000paint coated surfaces are hardly fouled by marine organisms within 365 days. This \u0000work demonstrates that in situ synthesis \u0000of rGO@Cu2O is a tin-free potential alternative to inhibit \u0000biofouling.","PeriodicalId":64141,"journal":{"name":"有机高分子材料期刊(英文)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46172191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

PVA Nanofibers Containing Ofloxacin-Cyclodextrin Inclusion Complex: Improve Optical Stability of Ofloxacin 含氧氟沙星-环糊精包合物的PVA纳米纤维：提高氧氟沙星的光学稳定性

有机高分子材料期刊(英文) Pub Date : 2019-04-10 DOI: 10.4236/OJOPM.2019.92002

M. Mehrizi, S. Amiri, S. Bahrami

{"title":"PVA Nanofibers Containing Ofloxacin-Cyclodextrin Inclusion Complex: Improve Optical Stability of Ofloxacin","authors":"M. Mehrizi, S. Amiri, S. Bahrami","doi":"10.4236/OJOPM.2019.92002","DOIUrl":"https://doi.org/10.4236/OJOPM.2019.92002","url":null,"abstract":"Ofloxacin is an antibiotic with a wide range of activity against bacterial infections, but due to the high potential for toxicity when exposed to light, resolving this problem and further stabilizing the drug are among the posed challenges. Inclusion complex formation between α-cyclodextrin (α-CD), ofloxacin (OFL) and polyethylene glycol (PEG) was prepared via two methods to produce nanocontainers with desirable stability. The effect of PEG as compatible solubilizing agent and mixing condition (in ultrasonic bath) were investigated in formation of an inclusion complex between α-CD/OFL. Obtained complexes were examined by FTIR, H-NMR, SEM, EDX and UV which indicated the formation of an inclusion complex between α-CD/OFL, in turn, is a mixture of the cage and channel structures. Differences between 1H-NMR, FTIR and XRD spectra of OFL, CDs and inclusion complex indicated the formation of α-CD/OFL and supramolecular containers in solid phase. These inclusion complexes loaded in PVA-based nanofibers for smart nanofibers with controlled release manner and higher stability of OFL. Obtained nanofiber showed that nanofibers containing CDs/OFL under sonic energy containing higher degree of OFL.","PeriodicalId":64141,"journal":{"name":"有机高分子材料期刊(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41533306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The Effects of Build Parameters and Strain Rate on the Mechanical Properties of FDM 3D-Printed Acrylonitrile Butadiene Styrene 构建参数和应变速率对FDM 3d打印丙烯腈-丁二烯-苯乙烯材料力学性能的影响

有机高分子材料期刊(英文) Pub Date : 2019-01-31 DOI: 10.4236/OJOPM.2019.91001

Kemar Hibbert, G. Warner, Celeste A. Brown, O. Ajide, G. Owolabi, A. Azimi

{"title":"The Effects of Build Parameters and Strain Rate on the Mechanical Properties of FDM 3D-Printed Acrylonitrile Butadiene Styrene","authors":"Kemar Hibbert, G. Warner, Celeste A. Brown, O. Ajide, G. Owolabi, A. Azimi","doi":"10.4236/OJOPM.2019.91001","DOIUrl":"https://doi.org/10.4236/OJOPM.2019.91001","url":null,"abstract":"In this paper, the effects of build parameters on the mechanical properties of 3D-printed acrylonitrile butadiene styrene (ABS) produced using fused deposition modeling (FDM) are investigated. Full factorial experimental design incorporating a 2-level, 3-factor design with raster angle, layer thickness and interior fill style was carried out. Tensile tests were performed at four different strain rates to determine how the build parameters influence the mechanical properties of the 3-D printed ABS and to assess its strain rate sensitivity under quasi-static loading. It was found that the modulus of toughness of ABS material is most influenced by raster angle, while the interior fill style is the most dominant build parameter that dictates the specimen’s modulus of resilience, yield strength and ultimate tensile strength. At all strain rates, it is further revealed that higher mean values of yield strength, ultimate tensile strength and modulus of resilience were obtained when the interior fill style is solid as opposed to high density. This can be attributed to the denser structure and higher effective cross-sectional area in solid interior fill style in comparison with high density interior fill style. However, the influence of the layer thickness on the investigated mechanical properties was found to be inconsistent. It was noted that specimens built with both 0.254 mm layer thickness and the cross [0°/90°] raster angle had superior mechanical properties when compared to those built with the 0.3302 mm layer thickness and cross [0°/90°] raster angle. This suggests that there is a key interaction between the layer thickness and the raster angle. At any FDM build parameter, it was found that all the mechanical properties investigated in this work exhibited modest sensitivity to strain rates. This study has provided a platform for an appropriate selection of build parameters combinations and strain rates for additive manufacturing of 3D-printed ABS with improved mechanical properties.","PeriodicalId":64141,"journal":{"name":"有机高分子材料期刊(英文)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47828024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 21