Cellular Polymers最新文献_第9页

Production and characterization of fully biobased foamed films based on gelatin 明胶基全生物发泡膜的制备与表征

IF 1.6 4区医学

Cellular Polymers Pub Date : 2020-01-07 DOI: 10.1177/0262489319897632

J. Solorza-Feria, M. A. Ortiz-Zarama, A. Jiménez–Aparicio, D. Rodrigue

{"title":"Production and characterization of fully biobased foamed films based on gelatin","authors":"J. Solorza-Feria, M. A. Ortiz-Zarama, A. Jiménez–Aparicio, D. Rodrigue","doi":"10.1177/0262489319897632","DOIUrl":"https://doi.org/10.1177/0262489319897632","url":null,"abstract":"The objective of this study was to produce and characterize gelatin foamed films using extrusion. Three “optimum” formulations containing tannic acid, nanoclays (Cloisite Na+), glycerol, water, and gelatin, as well as three “controls” without tannic acid and nanoclays were prepared by calendering. Furthermore, the three “optimum” formulations were produced by extrusion film blowing only, since no stable processing conditions could be obtained for the controls. A complete set of sample characterization was performed, including morphological, mechanical, physical, and thermal properties. The results showed that besides the processing method, the thickness was also controlled by the glycerol and water content, leading to density slightly above unity, with higher values for the optimum materials. The calendered films from the optimum formulations showed overall a higher number of cells and cell density than the controls. Higher elastic moduli and tensile strengths were obtained for the films from the optimum formulations made by either method because of the reinforcing effect of the tannic acid and nanoclays, but this led to lower strain at break. The thermal profiles were similar for all films, with higher stability for the optimum formulations. The results were also explained via chemical interactions between the components as observed by Fourier transform infrared spectroscopy. Overall, the optimum formulations not only produced better foamed films in terms of general properties but were much easier to process by both methods (calendering and blowing).","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2020-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/0262489319897632","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46903097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

The influence of blowing agent addition, talc filler content, and injection velocity on selected properties, surface state, and structure of polypropylene injection molded parts 研究了发泡剂添加量、滑石填料含量和注射速度对聚丙烯注塑件的性能、表面状态和结构的影响

IF 1.6 4区医学

Cellular Polymers Pub Date : 2020-01-01 DOI: 10.1177/0262489319873642

Paweł Palutkiewicz, M. Trzaskalska, E. Bociąga

引用次数: 12

Effect of PBAT on physical, morphological, and mechanical properties of PBS/PBAT foam PBAT对PBS/PBAT泡沫物理、形态和力学性能的影响

IF 1.6 4区医学

Cellular Polymers Pub Date : 2020-01-01 DOI: 10.1177/0262489319873859

Aekartit Boonprasertpoh, D. Pentrakoon, Jirawut Junkasem

{"title":"Effect of PBAT on physical, morphological, and mechanical properties of PBS/PBAT foam","authors":"Aekartit Boonprasertpoh, D. Pentrakoon, Jirawut Junkasem","doi":"10.1177/0262489319873859","DOIUrl":"https://doi.org/10.1177/0262489319873859","url":null,"abstract":"This study examines the effect of poly(butylene adipate-co-terephthalate) (PBAT) content on the physical, morphological, and mechanical properties of poly(butylene succinate) (PBS)/PBAT foam. A compression molding technique was used to prepare the PBS/PBAT foam using the chemical blowing agent azodicarbonamide and the cross-linking agent dicumyl peroxide. The chemical structure and morphological properties of PBS/PBAT foam were examined via Fourier transform infrared and scanning electron microscopy techniques, respectively, whereas tensile and flexural properties were investigated using a universal testing machine. The results reveal that the incorporation of PBAT barely enhances the viscosity of the PBS/PBAT blend, producing only minor changes in the average cell size of PBS/PBAT foam. However, increasing the PBAT content contributes to a relatively significant improvement in the flexibility and toughness of PBS/PBAT foam, where a decrease in Young’s modulus and tensile strength of the PBS/PBAT foam is observed compared with those of the PBS foam. Similar behavior to the tensile results is noticed for the flexural properties of the neat and PBS/PBAT foams.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/0262489319873859","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47471159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18

Novel 3-D hierarchical multiconfiguration graphene/polyaniline-based aerogels with directed higher performances 具有定向高性能的新型三维分级多结构石墨烯/聚苯胺基气凝胶

IF 1.6 4区医学

Cellular Polymers Pub Date : 2020-01-01 DOI: 10.1177/0262489319885031

Rui Yao, J. Ju, Z. Yao

{"title":"Novel 3-D hierarchical multiconfiguration graphene/polyaniline-based aerogels with directed higher performances","authors":"Rui Yao, J. Ju, Z. Yao","doi":"10.1177/0262489319885031","DOIUrl":"https://doi.org/10.1177/0262489319885031","url":null,"abstract":"Novel three-dimensional (3-D) hierarchical multiconfiguration graphene/polyaniline-based aerogels were synthesized via in situ polymerization and directed freeze-drying method. The composite aerogels enhanced excellent thermal and electrical performances, at the same time, their 3-D hierarchical multiconfiguration was robust and stable, which made them more beneficial to be applied to thermal or electrical fields. Graphene oxide/polyaniline (GO/AP) and reduced graphene oxide (RGO/AP) were prepared. The multiconfiguration structure can be apparently observed through scanning electron microscopy image of GO/AP aerogel: the aerogels were composed of skeleton structure with paralleled open holes; the skeleton structure was made up by hierarchical GO sheet with AP network; and the AP network consisted of AP skeleton and nanopores. GO/AP aerogels showed higher heat resistance than single AP aerogel. In addition, compared with GO/AP and AP aerogels, RGO/AP aerogel had the best electrical performances (vertical electrical conductivity: 1.23 S cm−1 and specific capacitance: 580 F g−1). What is more, attributed to the multiconfiguration structure, the composite aerogels exhibited excellent performances in holes extending direction.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/0262489319885031","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48157249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Added-value porous materials for controlled thymol release obtained by supercritical CO2 impregnation process 超临界CO2浸渍法制备控制百里酚释放的附加值多孔材料

IF 1.6 4区医学

Cellular Polymers Pub Date : 2019-09-09 DOI: 10.1177/0262489319872329

S. Milovanović, D. Marković, J. Ivanovic

{"title":"Added-value porous materials for controlled thymol release obtained by supercritical CO2 impregnation process","authors":"S. Milovanović, D. Marković, J. Ivanovic","doi":"10.1177/0262489319872329","DOIUrl":"https://doi.org/10.1177/0262489319872329","url":null,"abstract":"This study explores utilization of biodegradable and biocompatible polymers for controlled release of natural bioactive substance. For that purpose, poly(ε-caprolactone) (PCL) beads, cellulose acetate (CA) film, and poly lactic-co-glycolic acid (PLGA) flakes were impregnated with thymol by employing environmentally friendly process of supercritical carbon dioxide (scCO2) impregnation. At selected pressure and temperature, prolongation of operating time increased thymol loading. Pure scCO2 did not affect CA film with average pore diameter of approximately 3 µm, while it enabled change of PCL beads and PLGA flakes into foams with average pore diameter approximately 175 µm and 87 µm, respectively. Additionally to scCO2, thymol acted as a plasticizer increasing pore size of polymers up to three times. Kinetic of thymol release from selected samples was tested using phosphate buffer saline at 37°C and successfully described with Korsmeyer–Peppas, zero-order, first-order, and Higuchi models. The suggested method of PCL, CA, and PLGA supercritical impregnation led to development of porous, solvent free, added-value materials that release thymol in a controlled manner from 5 h to several days.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2019-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/0262489319872329","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46502546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Injection-molded lightweight and high electrical conductivity composites with microcellular structure and hybrid fillers 注射成型轻量化高导电性复合材料与微孔结构和混合填料

IF 1.6 4区医学

Cellular Polymers Pub Date : 2019-09-02 DOI: 10.1177/0262489319871747

Shenghui Tian, Binbin Dong, Yahao Guo, Can Zhao, Mengxia Zhang, Mengjun Xiao

{"title":"Injection-molded lightweight and high electrical conductivity composites with microcellular structure and hybrid fillers","authors":"Shenghui Tian, Binbin Dong, Yahao Guo, Can Zhao, Mengxia Zhang, Mengjun Xiao","doi":"10.1177/0262489319871747","DOIUrl":"https://doi.org/10.1177/0262489319871747","url":null,"abstract":"Polypropylene/carbon black (PP/CB) and PP/CB/multiwalled carbon nanotube (PP/CB/MWCNT) composites were fabricated by solid and foam injection molding, with the goal of enhancing the electrical conductivity of the composites while decreasing the cost of the final product. The foaming behavior and through-plane (T-P) electrical conductivity of the composites were characterized and analyzed. Cell growth increased the interconnection of the conductive fillers, changed the filler orientation, and enhanced the T-P electrical conductivity of the composites. Under appropriate processing conditions (200°C melt temperature, 70 cm3/s injection flow rate, and 5% void fraction), the T-P electrical conductivity of the foam PP/CB composites was 5 orders of magnitude higher than that of the solid composites (from 5.877 × 10−12 S/m to 1.010 × 10−7 S/m). Moreover, the T-P electrical conductivity values of the PP/CB and PP/CB/MWCNT were compared at the same conductive fillers content (15 wt%). The results showed that the T-P electrical conductivity of the PP/CB/MWCNT composites was far higher than that of the PP/CB composites by almost five orders of magnitude because the MWCNT acted as a bridge between CB particles, and a unique geometric shape was formed in the system. The T-P electrical conductivity of the foam PP/CB/MWCNT composites with 15 wt% carbon fillers was higher than that of the solid PP/CB composites with 20 wt% carbon fillers. This study reveals that the effect of foaming and the addition of hybrid fillers can improve the T-P electrical conductivity of plastic products, which is very important for the development of lightweight conductive plastics.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2019-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/0262489319871747","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41301466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Effects of dynamic mold temperature control on melt pressure, cellular structure, and mechanical properties of microcellular injection-molded parts: An experimental study 模具动态温度控制对微孔注射成型件熔体压力、孔结构和力学性能的影响：实验研究

IF 1.6 4区医学

Cellular Polymers Pub Date : 2019-08-29 DOI: 10.1177/0262489319871741

Guiwei Dong, Guoqun Zhao, Junji Hou, Guilong Wang, Y. Mu

{"title":"Effects of dynamic mold temperature control on melt pressure, cellular structure, and mechanical properties of microcellular injection-molded parts: An experimental study","authors":"Guiwei Dong, Guoqun Zhao, Junji Hou, Guilong Wang, Y. Mu","doi":"10.1177/0262489319871741","DOIUrl":"https://doi.org/10.1177/0262489319871741","url":null,"abstract":"In this work, the effects of dynamic mold temperature control (DMTC) on melt pressure, cellular structure, and mechanical properties of microcellular injection molding (MIM)-molded parts are investigated experimentally. It is found that with the increase of the mold temperature, the duration of foaming pressure in the cooling stage increases. Meanwhile, the average cell diameter and cell diameter dispersion increases as well as the cell density decreases in MIM molded parts. The turning point of mold temperature after which the foaming pressure in the cooling stage and the cellular structure in MIM molded parts generate a significant change is around the glass transition temperature of the used plastic material. Under DMTC conditions, with the increase of mold temperature, the tensile strength, flexural strength, and impact strength of MIM molded specimens of single gate without weld line change a little, while the tensile strength, flexural strength of MIM molded specimens of double gates with weld line increase obviously. When the mold temperature increases to 120°C and over, the tensile strength, flexural strength of MIM molded specimens of double gates with weld line reach an equivalent level of specimens of single gate without weld line.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/0262489319871741","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48885626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microcellular morphology evolution of polystyrene/thermoplastic polyurethane blends in the presence of supercritical CO2 超临界CO2存在下聚苯乙烯/热塑性聚氨酯共混物的微孔形态演变

IF 1.6 4区医学

Cellular Polymers Pub Date : 2019-06-06 DOI: 10.1177/0262489319852335

Z. Qu, Jianguo Mi, Yang Jiao, Hongfu Zhou, Xiangdong Wang

引用次数: 9

Effect of acrylonitrile–butadiene–styrene terpolymer on the foaming behavior of polypropylene 丙烯腈-丁二烯-苯乙烯三元共聚物对聚丙烯发泡行为的影响

IF 1.6 4区医学

Cellular Polymers Pub Date : 2019-05-30 DOI: 10.1177/0262489319852331

Xiaoyan Tan, Ying‐Guo Zhou, Jinghong Zhou, Binbin Dong, Chun-tai Liu, Bai‐Ping Xu

{"title":"Effect of acrylonitrile–butadiene–styrene terpolymer on the foaming behavior of polypropylene","authors":"Xiaoyan Tan, Ying‐Guo Zhou, Jinghong Zhou, Binbin Dong, Chun-tai Liu, Bai‐Ping Xu","doi":"10.1177/0262489319852331","DOIUrl":"https://doi.org/10.1177/0262489319852331","url":null,"abstract":"To improve the cellular foam structure of common polypropylene (PP), acrylonitrile–butadiene–styrene terpolymer (ABS) and compatibilizer were used to blend with PP, and the foaming behavior of PP/ABS blends was investigated. The solid and foamed samples of the PP/ABS blend with different component were first fabricated by melt extrusion followed by conventional injection molding with or without a blowing agent. The mechanical properties, thermal features, and rheological characterizations of these samples were studied using the tensile test, dynamic mechanical analyzer, differential scanning calorimetry, scanning electron microscopy, X-ray diffraction, and torque rheometry. The results suggest that ABS is a suitable candidate to improve the foamability of PP. The effect of ABS and compatibilizer on the foamability of PP can be attributed to three possible mechanisms, that is, the weak interaction between phases that facilitates cell nucleation, the improved gas-melt viscosity that prevents the escape of gas, and the influence of crystallization behavior that helps to form a fine foaming structure.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2019-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/0262489319852331","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46000944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 15

The foaming performance evaluation of fibrillated polytetrafluoroethylene and isotactic polypropylene blends 原纤化聚四氟乙烯和全同立构聚丙烯共混物的发泡性能评价

IF 1.6 4区医学

Cellular Polymers Pub Date : 2019-05-20 DOI: 10.1177/0262489319846785

Yun Zhang, C. Xin, Zeming Wang, Waqas Mughal, Yadong He

引用次数: 1