Iranian Polymer Journal最新文献

{"title":"Preparation of rare-earth LDHs stabilizers and their effects on the thermal stability of poly(vinyl chloride)","authors":"Peijie Jia,&nbsp;Jinsheng Duan,&nbsp;Zhaogang Liu,&nbsp;Yilin Li,&nbsp;Guifang Du,&nbsp;Yanhong Hu,&nbsp;Jinxiu Wu","doi":"10.1007/s13726-024-01363-0","DOIUrl":"10.1007/s13726-024-01363-0","url":null,"abstract":"<div><p>This study delves into the exploration of zinc lanthanum layered double hydroxides (Zn–La-LDHs) and zinc aluminum lanthanum layered double hydroxides (Zn–Al–La-LDHs) as potential thermal stabilizers for poly(vinyl chloride) (PVC). The investigation aims to elucidate the synergistic effects of the above rare-earth (RE) LDHs in combination with dibenzoylmethane (β-diketone), pentaerythritol (PE), and other commonly employed heat stabilizers on PVC’s crucial properties, including thermal stability, plasticization, and mechanical strength. The experimental findings demonstrated notable enhancements in PVC’s thermal stability upon incorporation of RE-LDHs, β-diketone, and PE. This enhancement is attributed to the ability of RE-LDHs to effectively hinder degradation reactions within the PVC matrix, thereby increasing its degradation activation energy and overall stability. Moreover, the integration of RE-LDHs contributes significantly to improving PVC’s plasticization and mechanical properties, rendering it suitable for a diverse range of applications. While both Zn–La-LDHs and Zn–Al–La-LDHs exhibited good thermal stability, Zn–La-LDHs demonstrated slightly inferior performance compared to Zn–Al–La-LDHs. This distinction underscores the importance of considering the specific characteristics of each LDHs compound when formulating PVC stabilizer systems. Furthermore, this study highlights the potential of RE-LDHs as eco-friendly alternatives to traditional PVC stabilizers, offering opportunities to develop sustainable stabilizer formulations that address environmental concerns associated with conventional stabilizers. In conclusion, the synthesis and application of RE-LDHs represent a significant advancement in PVC stabilization technology, providing a viable and environmentally conscious approach to enhancing the performance and longevity of PVC-based materials.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"34 1","pages":"99 - 109"},"PeriodicalIF":2.4,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141742691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermal stability of flexible polyurethane foams obtained from reactive phosphorus-containing polyols dispersed in polyethylene glycol","authors":"Stanley Olivier Kanemoto,&nbsp;Pierre Christelle Mvondo Onana,&nbsp;Arnaud Maxime Yona Cheumani,&nbsp;Maurice Kor Ndikontar,&nbsp;Madurai Suguna Lakshmi","doi":"10.1007/s13726-024-01351-4","DOIUrl":"10.1007/s13726-024-01351-4","url":null,"abstract":"<div><p>Flame-retardant and flexibility-enhanced phosphorus-polyurethane foams (P-PUF)s were prepared from phosphorus–hydroxyl precursors and polyethylene glycol (PEG) as polyols. In the first step, three different precursors, such as tris-(5-hydroxypentyl) phosphate (P-Pen-OHs), tris-(4-hydroxybutyl) phosphate (P-But-OHs), and tris-(3-hydroxypropyl) phosphate (P-Pro-OHs) were synthesized and used as flame retardants. In the second step, the precursors were made to react with toluene-2,4-diisocyanate to modify the flexibility and flame retardancy properties of the P-PUF product. The P-PUFs were obtained by a one-shot process system and then analyzed for their thermal stability, flame retardancy, and compressive strength properties. Among all P-PUF samples, P-But-PUF showed the best compressive properties with a Young’s modulus value of 0.167 MPa. The compressive properties of P-PUF are found to be proportional to their relative density. These results show that the chemical structure of the phosphorus–hydroxyl precursor had a slight effect on the compressive properties as well as the porosity of the final materials. All the foams had T_g values in the range of 58–70 ℃ and their thermal degradation in a nitrogen atmosphere started around 100 ℃. From the limiting oxygen index test, P-PUF samples are considered marginally stable materials with a slow-burning behavior that confirms the efficiency of reactive phosphorus-based flame retardants.</p><h3>Graphic abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"33 12","pages":"1701 - 1711"},"PeriodicalIF":2.4,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s13726-024-01351-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141742487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modification of fly ash cenospheres by 3-glycidyloxypropyl trimethoxysilane (GPTMS) for anticorrosive coating applications","authors":"Mithilesh Kogje,&nbsp;Siddhesh Mestry,&nbsp;Jyoti Darsan Mohanty,&nbsp;S. T. Mhaske","doi":"10.1007/s13726-024-01359-w","DOIUrl":"10.1007/s13726-024-01359-w","url":null,"abstract":"<div><p>The present work focused on the functionalization of fly ash cenospheres (FACs) by GPTMS for anticorrosive applications. FACs are an industrial waste product from coal industry that possesses valuable properties such as lightweight, low water absorption, corrosion resistance, and chemical inertness. Epoxy is one of the best materials for superior corrosion performance and excellent substrate adhesion and therefore was chosen as the base matrix. 3-Glycidyloxypropyl trimethoxysilane (GPTMS) was selected as the suitable silane functionalization agent (with the variation of 2, 4, and 6 wt% of cenospheres due to its compatibility with epoxy resin). GPTMS can help corrosion control by forming dense Si–O–Si networks that act as a protective barrier against water, aggressive ions, etc. FTIR and XRD analyses studied the primary structural confirmation of silane-modified cenosphere, while the morphology was studied by SEM analysis. TGA and DTG curves investigated the thermal properties of the coatings, while EIS studies evaluated the anticorrosive attributes. The EIS results showed that the corrosion rate decreased as the percentage of silane increased in the coating, which indicates the superior anticorrosion behaviour of the 6 GPTMS FAC–epoxy sample compared to others.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"34 1","pages":"83 - 97"},"PeriodicalIF":2.4,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141612144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis and characterization of novel pectin-based copper oxide nanocomposite and its application for removal and photocatalytic degradation of methylene blue from aqueous solution","authors":"Ravi Kumar,&nbsp;Poorn Prakash Pande,&nbsp;Arbind Chaurasiya,&nbsp;Kajal Kumar Dey,&nbsp;Nandita Kushwaha,&nbsp;Praveen Kumar,&nbsp;Kopal Kashaudhan","doi":"10.1007/s13726-024-01355-0","DOIUrl":"10.1007/s13726-024-01355-0","url":null,"abstract":"<div><p>The pectin-modified hydrogel-copper oxide nanocomposite (PMH@CuO) has been successfully synthesized using free radical polymerization method by incorporating CuO nanoparticles into pectin-modified hydrogel (PMH) network. The target of this work was to examine the usage of PMH@CuO nanocomposite for eliminating methylene blue (MB) dye from aqueous solutions. The CuO nanoparticles (NPs) as well as PMH@CuO nanocomposite have been characterized by several techniques, viz<i>.,</i> UV–visible and FTIR spectroscopies, TGA, <i>ΔpH</i>_<i>pzc</i>, XRD, and SEM analyses. The percentage removal of MB dye has been found to be 98.41% at pH of 7 during 30 min with dye concentration of 50 mg/L, and dosage of adsorbent 1.2 g/L, at 25°C. The adsorption kinetics has been found to fit perfectly with pseudo-second-order kinetic model. The adsorption data fit appreciably with Langmuir isotherm model, representing monolayer adsorption with maximum adsorption capacity (<i>q</i>_<i>e</i>) of 132.27 mg/g at 25℃. A thermodynamic analysis revealed that the MB dye adsorption was a spontaneous and exothermic process and resulted in lowering of entropy. The photocatalytic activity of the PMH@CuO nanocomposite has been found to be quite notable as the degradation of 80.20% of MB dye was observed within 60 min under visible light. Moreover, the synthesized nanocomposite was reusable up to five adsorption and desorption cycles with 86.8% of adsorption and 85.4% of desorption in fifth cycle.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"34 1","pages":"65 - 81"},"PeriodicalIF":2.4,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141568102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improved thermal conductivity of immiscible polyamide 6 (PA6)/polyolefin elastomer (POE) blend by controlling selective localization of aluminum nitride (AlN)","authors":"Marjan Shahmir,&nbsp;Shervin Ahmadi,&nbsp;Hassan Arabi","doi":"10.1007/s13726-024-01352-3","DOIUrl":"10.1007/s13726-024-01352-3","url":null,"abstract":"<div><p>The effect of selective localization of aluminum nitride (AlN) on the thermal conductivity of immiscible polyamide 6/polyolefin elastomer (PA6/POE/70/30) was studied. Morphological characterization proved that the neat blend had droplet-matrix morphology, and adding 10% (by wt) AlN to the minor phase resulted in stable co-continuous morphology formation. We have shown that the localization of AlN depends on the interfacial tensions between different blend components. AlN, which was first wetted by POE phase, tended to migrate to the interface due to thermodynamic tendency. AlN was first wetted by the PA6 phase following its dispersion in this phase. The rheological results confirmed the strong peculated structure formed in 70/30/10 (PA6/POE/AlN) sample and better thermal conductivity compared to pure blend. The thermogravimetric measurement revealed that the thermal stability of the composite with a double percolation structure increased by 8 °C compared to the pure sample. DSC analysis results showed that the crystallinity of 70/30/10 (PA6/POE/AlN) sample decreased nearly 25% due to increased interfacial area. The impact strength of 70-30-AO₁₀ reached 8.8 kJ.mm^–2, which was about 2 times higher than the pure PA6. The thermal conductivity of PA6/POE composite with 10% (by wt) AlN was enhanced to 3.76 W.(mK)⁻¹, nearly nine times higher than the pure blend. In summary, a stable co-continuous morphology with high thermal conductivity, fairly good mechanical properties, and low percolation threshold were obtained in immiscible (PA6/POE/70/30) blend by controlling the selective localization of 10% (by wt) AlN particles which can be a perspective for designing and producing composites especially in electronic devices.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"34 1","pages":"55 - 64"},"PeriodicalIF":2.4,"publicationDate":"2024-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141568103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mercerized flax-g-poly(polyvinyl alcohol + acrylic acid) reinforced polyester resin derived from waste plastic bottles: dynamic mechanical analysis and chemical-thermal resistance","authors":"Himani Sharma,&nbsp;Susmriti Dolui,&nbsp; Saksham,&nbsp;Divyansh Saini,&nbsp;Raman Bedi,&nbsp;Balbir Singh Kaith","doi":"10.1007/s13726-024-01356-z","DOIUrl":"10.1007/s13726-024-01356-z","url":null,"abstract":"<div><p>The aim of present work is to fabricate a polyester composite reinforced with mercerized flax-<i>g</i>-poly(polyvinyl alchol + acrylic acid) copolymer. In addition, a comparative study of mechanical properties using dynamic mechanical analysis (DMA) technique was made as a function of reinforcement of matrix with raw flax (rFlax) and mercerized flax (mFlax) in order to be able to use such composites in water resistant wall panelling, cupboards and furniture tops. Polyester resin was derived from waste plastic bottles. Binary vinyl monomer mixture of polyvinyl alcohol (PVA) and acrylic acid (AA) was graft copolymerized onto mFlax and a graft yield of 118.3% was obtained. Grafted mFlax showed higher acid–base, solvent and thermal resistance. Composites prepared were studied for different mechanical parameters like storage modulus, loss modulus and damping. The mFlax-<i>g</i>-poly(PVA + AA) reinforced composite showed higher storage modulus (E’) and exhibited higher Tanδ value which indicated superior damping properties. A higher glass transition temperature was also observed, which was further supported by thermal studies. The novelty of the present work is the approach of waste to wealth, in which chemically modified textile waste and recycled plastic resins were used in the preparation of composites. The mechanical properties obtained through DMA showed that the composite reinforced with chemically modified flax had better storage modulus, loss modulus and damping properties.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"34 1","pages":"39 - 53"},"PeriodicalIF":2.4,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141552307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Compatibility and miscibility of recycled polyethylene terephthalate/polyamide 11 blends with and without Joncryl® compatibilizer: a comprehensive study of mechanical, thermal, and thermomechanical properties","authors":"Unsia Habib,&nbsp;Zahid Iqbal Khan,&nbsp;Zurina Binti Mohamad","doi":"10.1007/s13726-024-01357-y","DOIUrl":"10.1007/s13726-024-01357-y","url":null,"abstract":"<div><p>This innovative study explores the enhanced compatibility and miscibility of recycled polyethylene terephthalate and polyamide 11 (RPET/PA-11), particularly when modified with Joncryl^®, a compatibilizer. This investigation marks the first venture into the detailed thermal and thermo-mechanical properties of the blends. Remarkably, the addition of 20% (by weight) PA-11 to RPET significantly boosts tensile strength from 18.5 ± 2.64 to 32.20 ± 4.95 MPa, flexural strength from 27.90 ± 3.17 to 46.75 ± 0.78 MPa, and impact strength from 110.53 to 147.12 J/m. Furthermore, introducing 2 phr Joncryl^® further fortifies these strengths to 46.24 ± 0.87 MPa, 63.12 ± 4.75 MPa, and 667.68 ± 130.74 J/m, respectively. The study revealed a rise in the storage modulus of RPET from 1128 to 1298.5 MPa with 20% (by weight) of PA-11. Compatibility and miscibility assessments through Fourier transformation infrared (FTIR), dynamic mechanical analysis (DMA), differential scanning calorimetry (DSC), thermal gravimetric analysis (TGA), and scanning electron microscopy (SEM) validate the blend's uniformity. DSC reveals that the melting temperatures for RPET/PA-11 blends with varying PA-11 concentrations closely match the melting temperature of pure RPET, signifying stable thermal properties. DSC results confirmed that the T_m1 temperature for cold crystallization drops with the addition of Joncryl^® content, suggesting improved interaction and miscibility between RPET and PA-11. TGA results disclosed that Joncryl^® compatibilizer, especially at 2 phr, boosts the thermal stability of RPET/PA-11 blends by improving miscibility. The 2 phr Joncryl^® blend was identified as the most robust in properties. This ground-breaking research highlights the potential of RPET in automotive and future advancements in polymer science.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"33 9","pages":"1313 - 1326"},"PeriodicalIF":2.4,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141552306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A comparative study of the physiochemical and biological properties of tetracycline-loaded polypropylene sutures prepared through different plasma treatments","authors":"Nader kasiri,&nbsp;Marziyeh Mousazadeh,&nbsp;Faezeh Mousazadeh,&nbsp;Maryam Nikkhah,&nbsp;Hamid Keshvari","doi":"10.1007/s13726-024-01353-2","DOIUrl":"10.1007/s13726-024-01353-2","url":null,"abstract":"<div><p>In this work, a comparative investigation was done on the physiochemical and biological properties of tetracycline-loaded polypropylene sutures prepared through nitrogen, oxygen, and/or argon plasma treatment/grafting method. Two types of multi- and monofilament polypropylene sutures were treated by various plasma gases followed by acrylonitrile and acrylic acid grafting. Nitrogen and oxygen plasmas compared to argon plasma showed higher efficiencies in functionalization and wettability of the filaments. Tetracycline hydrochloride loading on the plasma-treated/grafted filaments was done through immersion method. The prepared filaments were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and attenuated total reflection–Fourier transform infrared spectroscopy (ATR-FTIR) and their mechanical properties were determined, accordingly. The antibacterial effect of tetracycline hydrochloride was studied over two different Gram-positive and Gram-negative bacteria. No cytotoxicity was observed for these filaments on the L929 fibroblast cell line using MTT assay. The release profile of the tetracycline hydrochloride-loaded sutures reached the stationary phase in 25 h. Nitrogen plasma-treated sutures showed the highest drug release profile among the others. The current work showed the effects of different plasma treatments on the biological, mechanical, and chemical properties of the tetracycline-loaded polypropylene sutures. The nitrogen plasma was superior to oxygen plasma in the opinion of grafting rate, mechanical properties, and antibacterial activities.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"34 1","pages":"29 - 37"},"PeriodicalIF":2.4,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141524994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic effect of a new binary accelerator system on curing characteristics and properties of styrene–butadiene rubber vulcanizates","authors":"Fahima M. Helaly,&nbsp;Adel A. Koriem,&nbsp;Samaa R. Salem,&nbsp;Sanaa M. El-Sawy,&nbsp;Fikry A. Abdel-Mohdy,&nbsp;Aman I. Khalaf","doi":"10.1007/s13726-024-01344-3","DOIUrl":"10.1007/s13726-024-01344-3","url":null,"abstract":"<div><p>Enhancing the vulcanization rate of elastomers is a common objective for optimizing their performance. Styrene–butadiene rubber (SBR) was vulcanized employing several conventional systems designed with various amounts of sulfur and activators/accelerators. Herein, it was an attempt to synthesize a copolymer from glycidyl methacrylate (GMA) and diethylaminoethyl methacrylate (DEAEMA)-(GMA-<i>co</i>-DEAEMA) and study its effect as a secondary accelerator on the curing characteristics and vulcanizate properties of SBR. The copolymer GMA-<i>co</i>-DEAEMA (III) was grafted with three different functional groups (R) including thioglycolic acid, 2-aminothiophenol, and 2-amino-5-mercaptothiazole, to yield III/S/1, IIII/S/2, and III/S/3 copolymers, respectively. The three-modified copolymers with an added conventional accelerator <i>N</i>-cyclohexyl-2-benzothiazole sulfenamide (CBS) were used to accelerate the efficiency of the vulcanizing agent (sulfur). Additional characterization of the synthesized copolymer and the obtained cured elastomer were carried out through different techniques, including mass and Fourier-transform infrared spectroscopy and thermogravimetric analysis (TGA), in addition to the rheological and mechanical studies. The results revealed that all the subject copolymers, when applied as a secondary accelerator for the SBR vulcanization reaction, enhanced the rate and the state of the cross-linking process. The findings of this study eruditely recommended that large rubber articles, like tires, could be cured more efficiently and cost-effectively when employing the presented copolymer as a secondary accelerator.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"33 12","pages":"1737 - 1749"},"PeriodicalIF":2.4,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141508919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Polylactide/polyvinyl acetate blends containing different molecular weights of poly(ethylene glycol)","authors":"Wenxi Cheng,&nbsp;Yuanhang Cao,&nbsp;Wei Miao,&nbsp;Yongjian Zhang,&nbsp;Li Tian,&nbsp;Haowei Lin,&nbsp;Weiqiang Song,&nbsp;Yike Zhang,&nbsp;Tao Wang","doi":"10.1007/s13726-024-01350-5","DOIUrl":"10.1007/s13726-024-01350-5","url":null,"abstract":"<div><p>Polylactide (PLA)/polyvinyl acetate (PVAc)/poly(ethylene glycol) (PEG) blends with different molecular weights of PEG (4000, 10000, and 20000 g/mol) were prepared, and the weight ratio was fixed at 72/18/10 (g/g/g) after the tensile analysis of PLA/PVAc and PLA/PEG blends, and finally the samples were characterized by various methods. The tensile and impact results showed that all the ternary blends were well toughened by PEG, and with the increase of PEG molecular weight, the tensile strength and impact strength increased. Scanning electron microscopy and energy-dispersive X-ray spectroscopy results indicated that 20% (by weight) of PVAc exceeded its solubility limit with PLA, and therefore the excess PVAc was dispersed as nanoparticles in the matrix. When PEG was added, the insoluble amount of PVAc decreased, indicating that the miscibility between PLA and PVAc could be increased by PEG. Differential Scanning Calorimetry results showed that T_m optical microscopy results showed that the number and size of PLA spherulites was peak areas of PLA in PLA/PVAc/PEG blends were smaller than that in PLA/PVAc blend, showing that the crystallinity of PLA was decreased with the addition of PEG in the presence of PVAc, which was confirmed by X-ray diffraction results. Polarization was the smallest in PLA/PVAc/PEG blends. All the ternary blends were transparent and had better visible light transmissions than PLA/PVAc blend. Thermal gravimetric analysis results showed that PLA and its blends had similar thermal stability. Overall, a low-cost PLA-modified material that combined high toughness, strength, and transparency without the need for customization was provided.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"33 12","pages":"1689 - 1699"},"PeriodicalIF":2.4,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141529810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}