JOURNAL OF APPLIED POLYMER SCIENCE
·
2016
·Vol. 134
·期 15
·
IF 1.866
Shuangbao Peng,BinShuang Wu,Linbo Wu,Bo-Geng Li,Philippe Dubois
It is indispensable to investigate hydrolytic degradation behavior to develop novel (bio)degradable polyesters. Biobased and biodegradable copolyesters poly(butylene adipate- co -butylene furandicarboxylate) (PBAF) and poly(butylene succinate- co -butylene furandicarboxylate) (PBSF) with BF molar fraction (ϕ BF ) between 40 and 60% were synthesized in this study. The hydrolytic degradation of film samples was conducted in a pH 7.0 PBS buffer solution at 25 °C. Slight mass loss (1–2%) but significant decrease in intrinsic viscosity (35–44%) was observed after 22 weeks. The apparent hydrolytic degradation rate decreased with increasing ϕ BF and initial crystallinity. Meanwhile, PBAFs degraded slightly faster than PBSFs with the same composition. The ϕ BF and crystallinity increased slowly with degradation time, suggesting the aliphatic moiety and the amorphous region are more susceptible to hydrolysis. And high enough tensile properties were retained after hydrolysis degradation, indicating PBAF and PBSF copolyesters are hydrolytically degradable, with tunable hydrolytic degradation rate and good balance between hydrolytic degradability and durability. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44674.
研究领域:
材料科学
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环境科学
·
高分子化学
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产品关联
DOI
高影响因子
POLYMER
·
2021
·
IF 4.43
Xue-Wei Wei,Lu-Lu Yang,Yi Li,Xiaoyu Meng,Li-Hai Cai,Qiong Zhou,Hai-Mu Ye
Blending is a convenient method to regulate the crystallization behavior and thus the performance of polymer materials, but poor compatibility in crystalline phase for different components remarkably depresses the co-crystallization capability, which poses a great challenge to effective regulation of the properties for crystalline/crystalline blends. In this work, the co-crystallization between two kinds of polyester with similar chain structure, poly(butylene succinate) (PBS) and poly(butylene fumarate) (PBF) is investigated and found to be dependent on the blending ratio and crystallization condition. A new type of co-crystal is only discovered in the PBS-rich blends ( i.e. , PBS/PBF-6/4 and PBS/PBF-8/2), and, further, it is proved as the isomorphism between PBS and PBF by employing various characterizations of differential scanning calorimeter and Fourier transformation infrared spectrometer and X-ray diffractometer. Both the enhancing cooling rate and the increasing PBS content benefit the growth of isomorphic co-crystal, and, its fraction in the blend of PBS/PBF-8/2 can reach as high as ∼75% during a fast cooling rate of 40 °C/min. In addition, the changes of Gibbs free energy for including butylene fumarate unit into PBS-type crystal and including butylene succinate unit into PBF-type crystal are respectively calculated as −0.96 and 1.94 kJ/mol, revealing the intrinsic thermodynamic driving force for the forming of isomorphism and clarifying why isomorphism only occurs in the PBS-rich blends. Finally, a summary of the crystallization behavior of PBS/PBF blend is reasonably sketched, which will help design the crystalline/crystalline blends with desired structure and performance.
研究领域:
材料科学
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高分子化学
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产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 9
·4610-4623
·
IF 2.936
Hongwei Pan,Zonglin Li,Jia Yang,Xin Li,Xue Ai,Yanping Hao,Huiliang Zhang,Lisong Dong
In this work, poly(lactic acid) and poly(butylene adipate-co-terephthalate) (PLA/PBAT 50/50) were melt-blended in the presence of 4,4′-methylene diphenyl diisocyanate (MDI) which acted as a reactive chain extender. The mechanical properties, phase morphology, thermal behavior and crystalline structure of the blends were investigated. Fourier transform infrared measurements revealed that some remarkable chemical interaction had taken place between the two polymers and MDI. Upon increasing the content of MDI, the blends showed increased tensile strength and elongation at break. With the addition of 0–2 wt% MDI, the impact strength of PLA/PBAT-MDI blends increased from 7.0 kJ m−2 to 70.0 kJ m−2. A large shift towards each other in terms of the glass transition temperature was observed by DMA and DSC analysis. SEM micrographs showed not only a reduction in the PBAT phase size but also a significant increase in interfacial adhesion between the PLA and PBAT phases with increasing of MDI. Furthermore, the toughening mechanism of the oriented samples was confirmed by wide-angle X-ray diffraction (WAXD) and small-angle X-ray scattering (SAXS) images; it was possible for the smaller crystallites of blends to form during the course of chain extension.
研究领域:
材料科学
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高分子化学
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产品关联
DOI
PubMed
高影响因子
Polymers
·
2023
·Vol. 15
·期 9
·2040
·
IF 5
Zhaoyang Niu,Fangping Chen,He Zhang,Changsheng Liu
The ternary blends of a high content of thermoplastic starch (TPS), poly(butylenes adipate-co-terephthalate) (PBAT), and poly(butylene succinate) (PBS) were first melt-compounded in a twin screw extruder. The TPS contents in ternary blends were fixed at 60 wt%. The miscibility, morphology, thermal behavior, mechanical properties, and thermal resistance of the blends were investigated. The results showed that dispersions of PBS and PBAT minor phases improved the tensile strength and elongation at break. TPS/PBS/PBAT60/10/30 formed a good balance in strength and toughness. Dynamic mechanical analysis of the blends exhibits an intermediate and peak suggesting the ternary blend is compatible. Minor phase-separated structure SEM results showed that TPS/PBS/PBAT60/10/30 blend formed a typical mixture with core−shell morphology. As the PBAT composition was increased, phase morphology changes occurred in the blends, leading to decreased values of complex viscosity, storage modulus, and loss modulus. Moreover, the thermal resistances and melt flow properties of the materials were also studied by analysis of the heat deflection temperature (HDT) and melt flow index (MFI) value in the work.Keywords:high starch content;thermoplastic starch;poly(butylene succinate);poly(butylenes adipate-co-terephthalate)
研究领域:
材料科学
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高分子化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2013
·Vol. 130
·期 6
·4075-4080
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IF 1.395
Weidong Zhou,Xiaowei Wang,Pingli Wang,Wei Zhang,Junhui Ji
Poly(butylene succinate- co -butylene adipate) (PBSA)/graphene oxide (GO) nanocomposites were synthesized via in situ polymerization for the first time. Atomic force microscopy demonstrated the achievement of a single layer of GO, and transmission electron microscopy proved the homogeneous distribution of GO in the PBSA matrix. Fourier transform infrared spectroscopy results showed the successful grafting of PBSA chains onto GO. With the incorporation of 1 wt % GO, the tensile strength and flexural modulus of the PBSA were enhanced by 50 and 27%, respectively. The thermal properties characterized by differential scanning calorimetry and thermogravimetric analysis showed increases in the melting temperatures, crystallization temperatures, and thermal stability. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 4075–4080, 2013
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2023
·Vol. 15
·期 4
·952
·
IF 5
Qing Zhang,Yongguang Gao,Baojing Luo,Yan Cui,Shili Shu,Wei Chen,Lei Wang
Poly(butylene succinate-butylene terephthalate) (PBST) and polylactic acid (PLA) are both biodegradable polymeric materials. PBST has good ductility but low strength, while PLA exhibits high strength but poor toughness. Based on the complementary mechanical properties of the two polymers, PBST/PLA blends were prepared by melt blending in the mixing chamber of a torque rheometer using styrene-maleic anhydride copolymer (PSMA) as a compatibilizer. The effects of different contents of PSMA on the crystalline properties, thermal properties, mechanical properties, rheological behavior, and morphology of PBST/PLA blends were investigated. The results showed that the addition of PSMA improved the compatibility between PBST and PLA. When the amount of PSMA is 3–4 wt%, the comprehensive mechanical properties of the blends are optimal, and the tensile strength was increased by 61.7% compared with the binary blend without PSMA. Additionally, rheological tests illustrated that the blends exhibited a typical shear-thinning behavior and belonged to pseudoplastic non-Newtonian fluids.Keywords:poly(butylene succinate-butylene terephthalate);polylactic acid;styrene-maleic anhydride copolymer;blends
研究领域:
材料科学
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高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER BULLETIN
·
2022
·Vol. 80
·期 9
·9709-9726
·
IF 2.843
Wang Guoqiang,Zhang Li,Wang Jianyu,Hao Xingyu,Dong Yakun,Sun Rubo
Polylactic acid (PLA) is a kind of bio-based and biodegradable polyester and has shown promise in a variety of fields, but its wider application is limited due to its brittle property. Therefore, in order to improve the ductility of PLA, we synthesized bio-based and biodegradable poly(butylene adipate-copolybutylene furandicarboxylate) (PBAF70) and blended with PLA. The blend's structure, mechanical properties, thermal properties, crystallization properties, and rheological properties were characterized. The results reveal that when the amount of PBAF70 varies from 0 to 30 wt%, the elongation at break increases from 5.7 to 222%, indicating that PBAF70 enhanced the ductility of PLA. At the same time, XRD results showed that stretching-induced crystallization occurred in PBAF70 during the stretching process. The strongly electronegative oxygen atoms in the furan ring may increase the interaction and the compatibility between PBAF70 and PLA. Therefore, the glass transition temperature of PBAF70 is not obvious in the DSC curves of the blends, and the rheological results show that the complex viscosity of the blends is greater than that of PLA. Due to the addition of PBAF70, PLA can only crystallize at a higher temperature, and the addition of PBAF70 hinders the cold crystallization of PLA. It can be seen from SEM that the cross section of the blend is rough, while the PLA is smooth. When the amount of PBAF70 was the same as that of PBAT, the elongation at break of PLA/PBAF70 was better than PLA/PBAT.
研究领域:
材料科学
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生物工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
·
IF 8.2
Guoqiang Wang,Li Zhang,Xiang Chi
Because of superior tensile strength , biodegradability , and biocompatibility, poly(lactic acid) (PLA) has emerged as one among the growth-oriented biodegradable materials. But it has been limited to some extent in practical applications due to poor ductility. Consequently, in order to improve the drawback of poor ductility of PLA, ductile blends were obtained by melt-blending of poly(butylene succinate- co -butylene 2,5-thiophenedicarboxylate) (PBSTF25) with PLA. PBSTF25 has a good improvement on the ductility of PLA due to its excellent toughness. Differential scanning calorimetry (DSC) showed that PBSTF25 promoted the cold crystallization of PLA. Wide-angle X-ray diffraction (XRD) results revealed that PBSTF25 experienced stretch-induced crystallization throughout the stretching procedure. Scanning electron microscopy (SEM) showed neat PLA had a smooth fracture surface, but the blends had rough fracture surface. PBSTF25 can improve the ductility and processing properties of PLA. When the addition of PBSTF25 reached 20 wt%, tensile strength was 42.5 MPa and elongation at break increased to 156.6 %, approximately 19 times as much as PLA. The toughening effect of PBSTF25 was better than that of poly(butylene succinate).
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Yuting Guo,Lei Sun,Can Fang,Ning Zhou,Tingyan Peng,Zhifeng Dai,Tao Zhang,Jian Chen,Yubing Xiong
Poly(lactic acid) (PLA)/poly(butylene adipate- co -terephthalate) (PBAT) blends have been widely developed due to their excellent biodegradability and complementary mechanical properties. However, PLA/PBAT blends are still facing the limitations of their poor compatibility and flammability. To address these challenges facilely, a family of functional compatibilizers was fabricated using epoxy-modified magnesium hydroxide (MH). Then, PLA/PBAT blends with these functional MH compatibilizers were prepared by reactive extrusion. Systematic study demonstrated that the compatibility of PLA/PBAT blends was significantly improved through the novel reactive compatibilization strategy. The elongation at the break of PLA/PBAT blends could be as high as 182.5 % without sacrificing the toughness. Additionally, PLA/PBAT blends possessed a good flame-retarded behavior. The limiting oxygen index (LOI) increased from 19.5 % to 24.9 % after compatibilized by epoxidized MH nanoparticles. Hence, our finding put forward a platform for the functional compatibilization of polymer blends, which has great potential applications in the field of material processing.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
PubMed
高影响因子
POLYMER
·
2024
·
IF 4.1
Liuchun Zheng,Xuedong Lv,Yongjun Zhang,Yi Liu
Due to the shortage of fossil resource and pollution problems caused by traditional non-degradable polymers, biodegradable polyesters attract increasing interest. Poly(butylene succinate) (PBS) has good biodegradation characteristics, relatively high melt temperature, excellent thermal stability and processing properties. However, its unique chemical structure renders it possesses relatively lower glass transition temperature ( T g ), insufficient mechanical properties. In this work, novel aliphatic cyclic rigid monomer (2,2,4,4-tetramethyl-1,3-cyclobutanediol (CBDO) was introduced into the macromolecular chain of PBS to improve the mechanical properties of PBS. The resulting copolyesters (PBCBS) show T g ranging from −34.7 to −25.6 °C. Tensile tests showed that theses polymers possess high tensile strength (44-29 MPa) and elongation at break as high as 450 %, which is prominently higher than that of commercial PBS and most biodegradable packaging materials. The novel copolyesters were studied by wide-angle X-ray diffraction analysis. It has been found that the introduction of CBDO reduces the crystallization ability of PBCBS and the main reason for this phenomenon is that the aliphatic ring restricts the mobility of macromolecular chains and regular stacking. As crystallinity is reduced, more water molecules can enter into the amorphous region, contact with the ester group bonds, and accelerate the degradation. In addition, the transparency at 700 nm for PBCBS can reach 95 % and it showed better solvent resistance as compared to polycarbonate. The biodegradable polyesters with satisfied combined performance were reported in this work.
研究领域:
材料科学
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生物降解材料
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高分子化学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER BULLETIN
·
2022
·Vol. 80
·期 4
·4487-4502
·
IF 2.843
Zhang Chuanhui,Chen Chao,Ouyang Chunping,Zeng Xiangbin,Guo Zhilong,Lai Fenghua,Li Jianjun
Aliphatic and aliphatic–aromatic polyesters are used widely in the food packaging field, which is very concerned about the volatile organic compound (VOC). Typical VOCs in poly (butylene succinate) (PBS) and poly (butylene adipate-co-terephthalate) (PBAT) are oligomers, especially cyclic esters, which were studied using GPC, MALDI-FTICR-MS and UPLC-FTICR-MS technique. Cyclic esters with repeating unit 2–8 were found in PBS; cyclic esters with repeating unit 1–10 (or more) were found in PBAT derived from three monomers with almost all possible random combinations. Cyclic esters with repeating unit 2–4 were the most abundant structures, but only cyclic esters with repeating unit 1–3 were found in the crystalline extracted from the recovered butanediol from the product line. Cyclic esters with repeating unit 1–3 can also be extracted from methanol at 70 °C for 1 h, and the content of linear oligomers increased with increasing temperature to 200 °C. But PBAT resin cannot be decomposed to monomers at 200 °C for 1 h in methanol without other additives. Graphical abstract
研究领域:
材料科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Xiao-Xuan Peng,Ze-Peng Bai,Kang Wu,Hua Zou,Hang-Tian Zhang,Jie-Xin Wang
The escalating global demand for poly(butylene terephthalate) (PBT), as one of the five major engineering plastics, has led to severe ecological crises and significant resource consumption. In this work, we employ 1,4-butanediol dispersions of ultrasmall zinc oxide nanoparticles (ZnO NPs) with an average size of 2.8 nm and excellent dispersity as catalysts for the highly efficient glycolysis of PBT using 1,4-butanediol. Specifically, complete depolymerization of PBT and approximately 98% yield of bis(4-hydroxybutyl) terephthalate (BHBT) are achieved within 45 min at 200 °C by only a minimal amount of ZnO NPs (0.1 wt %). More importantly, 95% PBT conversion can still remain after five cycles, exhibiting high recyclability of ZnO NPs. The possible reaction mechanism for glycolysis of PBT in 1,4-butanediol over ZnO NPs is proposed, and the reaction kinetics is also studied with an activation energy of 149.7 kJ/mol. Furthermore, ZnO NPs also show outstanding catalytic activity in the methanolysis of PBT, reaching over 97% yield of dimethyl terephthalate (DMT) within 60 min at 160 °C. This work provides a sustainable pathway for efficient recycling and reuse of PBT and broadens its market prospect.
研究领域:
材料科学
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催化化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）