Journal of Plastic Film & Sheeting最新文献_第7页

Industry News 行业新闻

IF 3.1 4区材料科学

Journal of Plastic Film & Sheeting Pub Date : 2022-04-08 DOI: 10.1177/87560879221089432

{"title":"Industry News","authors":"","doi":"10.1177/87560879221089432","DOIUrl":"https://doi.org/10.1177/87560879221089432","url":null,"abstract":"<p>Full circle: ZnII-complexes bearing half-salan ligands facilitate the mild and selective degradation of various commercial polyesters and polycarbonates into value-added products (green solvents and chemical building blocks). We report the first example of discrete metal-mediated poly (bisphenol A carbonate) methanolysis being appreciably active at room temperature, whilst the production of several renewable poly (ester-amides)s demonstrates a completely circular PET waste upcycling approach. ZnII-complexes bearing half-salan ligands were exploited in the mild and selective chemical upcycling of various commercial polyesters and polycarbonates. Remarkably, we report the first example of discrete metal-mediated poly (bisphenol A carbonate) (BPA-PC) methanolysis being appreciably active at room temperature. Indeed, Zn (2)2 and Zn (2)Et achieved complete BPA-PC consumption within 12–18 min in 2-Me-THF, noting high bisphenol A (BPA) yields (SBPA = 85–91%) within 2–4 h. Further kinetic analysis found such catalysts to possess kapp values of 0.28 ± 0.040 and 0.47 ± 0.049 min−1, respectively, at 4 wt%, the highest reported to date. A completely circular upcycling approach to plastic waste was demonstrated through the production of several renewable poly (ester-amide)s (PEAs), based on a terephthalamide monomer derived from bottle-grade poly (ethylene terephthalate) (PET), which exhibited excellent thermal properties.</p>","PeriodicalId":16823,"journal":{"name":"Journal of Plastic Film & Sheeting","volume":"36 2","pages":""},"PeriodicalIF":3.1,"publicationDate":"2022-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138524598","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

Regulatory expert corner global food contact regulation updates for 1st quarter 2022 监管专家专区2022年第一季度全球食品接触法规更新

IF 3.1 4区材料科学

Journal of Plastic Film & Sheeting Pub Date : 2022-03-26 DOI: 10.1177/87560879221089428

Huqiu Zhang

引用次数: 0

From the editor 来自编辑

IF 3.1 4区材料科学

Journal of Plastic Film & Sheeting Pub Date : 2022-03-25 DOI: 10.1177/87560879221089431

John R. WagnerJr

引用次数: 0

The effect of polycarbodiimide chain extender on thermal stability and mechanical properties of biobased poly(lactic acid)/natural rubber blown films 聚碳二酰亚胺扩链剂对生物基聚乳酸/天然橡胶吹膜热稳定性和力学性能的影响

IF 3.1 4区材料科学

Journal of Plastic Film & Sheeting Pub Date : 2022-03-25 DOI: 10.1177/87560879211058679

Kornchanok Akaradechakul, Peerapong Chanthot, N. Kerddonfag, C. Pattamaprom

引用次数: 1

Statistician’s corner what’s behind aliasing in fractional-factorial designs 统计学家的观点:分数阶乘设计中混叠的原因

IF 3.1 4区材料科学

Journal of Plastic Film & Sheeting Pub Date : 2022-03-24 DOI: 10.1177/87560879221089430

Shari Kraber

{"title":"Statistician’s corner what’s behind aliasing in fractional-factorial designs","authors":"Shari Kraber","doi":"10.1177/87560879221089430","DOIUrl":"https://doi.org/10.1177/87560879221089430","url":null,"abstract":"Aliasing in a fractional-factorial design means that it is not possible to estimate all effects because the experimental matrix has fewer unique combinations than a full-factorial design. The alias structure defines how effects are combined. When the researcher understands the basics of aliasing, they can better select a design that meets their experimental objectives. Starting with a layman’s definition of an alias, it is two or more names for one thing. Referring to a person, it could be “Fred, also known as (aliased) George.” There is only one person, but they go by two names. As will be shown shortly, in a fractional-factorial design, there will be one calculated effect estimate that is assigned multiple names (aliases). This example (Figure 1) is a 2̂ 3, 8-run factorial design. These eight runs can be used to estimate all possible factor effects including the main effects A, B, and C, followed by the interaction effects AB, AB, BC and ABC. An additional column “I” is the Identity column, representing the intercept for the polynomial. Each column in the full-factorial design is a unique set of pluses and minuses, resulting in independent estimates of the factor effects. An effect is calculated by averaging the response values where the factor is set high (+) and subtracting the average response from the rows where the term is set low ( ). Mathematically, this is written as follows: In this example, the A effect is calculated like this: The last row in Figure 1 shows the calculation result for the other main effects, 2-factor and 3-factor interactions and the Identity column. In a half-fraction design (Figure 2), only half of the runs are completed. According to standard practice, we eliminate all the runs where the ABC column has a negative sign. Now the columns are not unique—pairs of columns have the identical pattern of pluses and minuses. The effect estimates are confounded (aliased) because they are changing in exactly the same pattern. The A column is the same pattern as the BC column (A = BC).","PeriodicalId":16823,"journal":{"name":"Journal of Plastic Film & Sheeting","volume":"8 1","pages":"187 - 190"},"PeriodicalIF":3.1,"publicationDate":"2022-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78855322","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 effect of stretching and tie layer composition on adhesion strength of multi-layered films 拉伸和粘结层组成对多层膜粘接强度的影响

IF 3.1 4区材料科学

Journal of Plastic Film & Sheeting Pub Date : 2022-03-18 DOI: 10.1177/87560879211063475

M. Paul, B. Morris, J. Weinhold, K. Hausmann

引用次数: 1

Effect of nanofillers on polyurethane/polystyrene matrix nanocomposites: Characteristics and forthcoming developments 纳米填料对聚氨酯/聚苯乙烯基纳米复合材料的影响:特点及未来发展

IF 3.1 4区材料科学

Journal of Plastic Film & Sheeting Pub Date : 2022-02-18 DOI: 10.1177/87560879211059859

Ayesha Kausar

{"title":"Effect of nanofillers on polyurethane/polystyrene matrix nanocomposites: Characteristics and forthcoming developments","authors":"Ayesha Kausar","doi":"10.1177/87560879211059859","DOIUrl":"https://doi.org/10.1177/87560879211059859","url":null,"abstract":"Polyurethane and polystyrene are significant thermoplastic polymers having unique physical properties. This article considers the research trials on the fabrication, remarkable features, and technical applications of the polyurethane/polystyrene nanocomposites. The carbonaceous nano particles and inorganic nanofillers used with the polyurethane/polystyrene blend or copolymer are carbon nanotube, graphene, nanoclay, silica nanoparticles, and others. The considerable improvements in the physical properties of the polyurethane/polystyrene blend may occur through the nanofiller addition. The physical or covalent interactions between the blend or copolymer components and nanofillers may also positively affect the nanocomposite properties. The fabrication strategies used for the polyurethane/polystyrene nanocomposites include solution method, in situ method, melt blending, and several nanocomposite processing approaches. The structure, morphology, electrical conductivity, thermal stability, mechanical strength, and several other physical properties of the high performance polyurethane/polystyrene nanocomposites have been explored. Major application areas identified are shape memory, membrane, and gas transport properties.","PeriodicalId":16823,"journal":{"name":"Journal of Plastic Film & Sheeting","volume":"4 1","pages":"438 - 457"},"PeriodicalIF":3.1,"publicationDate":"2022-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81614673","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

Effect of temperature and pressure on the interfacial morphology and bond strength of thermally laminated glycol-modified polyethylene terephthalate/styrene-co-butadiene block copolymer films and comparison with coextruded (polyethylene terephthalate/styrene-co-butadiene block copolymer/polyethylene terephthalate) and polyethylene terephthalate/styrene-co-butadiene block copolymer/polyethylene terephthalate films heated with applied pressure after extrusion 温度和压力对热叠合乙二醇改性聚对苯二甲酸乙二醇酯/苯乙烯-共丁二烯嵌段共聚物薄膜界面形态和结合强度的影响，并与挤出后加压加热的共挤出(聚对苯二甲酸乙酯/苯乙烯-共丁二烯嵌段共聚物/聚对苯二甲酸乙酯)和聚对苯二甲酸乙酯/苯乙烯-共丁二烯嵌段共聚物/聚对苯二甲酸乙酯薄膜进行比较

IF 3.1 4区材料科学

Journal of Plastic Film & Sheeting Pub Date : 2022-02-06 DOI: 10.1177/87560879211046188

Katsunori Ishida, Shotaro Nishitsuji, Ken Miyata

{"title":"Effect of temperature and pressure on the interfacial morphology and bond strength of thermally laminated glycol-modified polyethylene terephthalate/styrene-co-butadiene block copolymer films and comparison with coextruded (polyethylene terephthalate/styrene-co-butadiene block copolymer/polyethylene terephthalate) and polyethylene terephthalate/styrene-co-butadiene block copolymer/polyethylene terephthalate films heated with applied pressure after extrusion","authors":"Katsunori Ishida, Shotaro Nishitsuji, Ken Miyata","doi":"10.1177/87560879211046188","DOIUrl":"https://doi.org/10.1177/87560879211046188","url":null,"abstract":"<p>This study focuses on controlling the interfacial adhesive strength between heat-sealed styrene-co-butadiene block copolymer (SBC) and glycol-modified polyethylene terephthalate (PETG) multilayer films. In comparison, the interfacial bond strength of coextruded PETG/SBC/PETG films was weaker. The lamella structures of SBC and free polybutadiene increased the interfacial adhesive strength. The coextruded films with applied thermal pressing were also examined. When exposed to heat, the interfacial adhesive strength improved. The butadiene layer segregated along the adhesive interface, as observed by transmission electron microscopy. The butadiene layer improved the interfacial adhesive strength. The applied pressure caused the butadiene layer to segregate in a parallel manner along the adhesive interface. The developed lamellar structure did not increase adhesive strength. We considered that the adhesive strength decreased due to a thinner butadiene layer with higher pressure. We concluded that adhesive segregation along the adhesive interface improved the bond strength.</p>","PeriodicalId":16823,"journal":{"name":"Journal of Plastic Film & Sheeting","volume":"13 2","pages":""},"PeriodicalIF":3.1,"publicationDate":"2022-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138524599","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

Entanglement density, macromolecular orientation, and their effect on elastic strain recovery of polyolefin films 缠结密度、大分子取向及其对聚烯烃薄膜弹性应变恢复的影响

IF 3.1 4区材料科学

Journal of Plastic Film & Sheeting Pub Date : 2022-01-31 DOI: 10.1177/87560879211058768

Fanny Traon, Y. Grohens, Y. Corre

{"title":"Entanglement density, macromolecular orientation, and their effect on elastic strain recovery of polyolefin films","authors":"Fanny Traon, Y. Grohens, Y. Corre","doi":"10.1177/87560879211058768","DOIUrl":"https://doi.org/10.1177/87560879211058768","url":null,"abstract":"For amorphous polymers, restoring forces are generated by the progressive orientation of the macromolecular chains in the stretching direction leading to a decrease in the system entropy. Orienting the chains in the future stretching direction thus reduces the entropy variation induced by the stretching and limits the entropic restoring force magnitude. Entropic restoring forces created during stretching have been correlated to the number of junction points by previous studies. Reducing the entanglement density (i.e., the number of junction points) is supposed to limit the entropic restoring force magnitude. In this study, the influence of blend ratio of low molecular weight wax and orientation level on the mechanical properties of the thin films, especially the elastic recovery, were evaluated. Elastic energy strain recovery was calculated from hysteresis curve obtained during 60% loading (stretch) and unloading (recovery) cycle and compared to rheological and orientation measurement. It has been shown that a decrease in entanglement density can minimize elastic recovery, Nevertheless, a compromise must be found, in order to limit the permanent deformation caused by chain flow. Macromolecular orientation is also a way to adjust the film mechanical properties. A LDPE 3 × 3 biaxial orientation leads to a 25% reduction in transversal direction elastic recovery (compared to MDO cast film) without altering machine direction mechanical behavior. However, for ethylene vinyl acetate, the uniaxial macromolecular orientation seems to impact the film behavior in the transverse direction by causing a smaller inter-atom distance, favoring a higher bond strength. The latter acts as transient physical nodes, increasing entropic restoring forces.","PeriodicalId":16823,"journal":{"name":"Journal of Plastic Film & Sheeting","volume":"62 1","pages":"306 - 336"},"PeriodicalIF":3.1,"publicationDate":"2022-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90820905","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

Mathematical simulation of the calendering process for non-Newtonian polymers 非牛顿聚合物压延过程的数学模拟

IF 3.1 4区材料科学

Journal of Plastic Film & Sheeting Pub Date : 2022-01-27 DOI: 10.1177/87560879211066900

M. Javed, Sarah Nasir, N. Ali, S. Arshad

引用次数: 3