Article
Biochemistry & Molecular Biology
Yit Thai Ong, Ting -Min Chen, Trong-Ming Don
Summary: Polymer blending can improve the compatibility of poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (P34HB) and poly(lactic acid) (PLA) by reducing their molecular weights. Simulation and experimental results demonstrated that decreasing molecular weight can increase the miscibility of the polymers. Additionally, PLA showed a better shielding effect on P34HB in blends prepared by melt-blending.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Polymer Science
Minki Jo, Yunjae Jang, Eunhye Lee, Sooan Shin, Ho-Jong Kang
Summary: Crystalline and noncrystalline mixtures of poly(3-hyroxybutylate-co-4-hyroxybutylate) (P(3HB-co-4HB)) were obtained by melt blending with different 4HB contents. The study found that the mixtures had better crystalline properties and melt processing properties compared to the copolymers. The mechanical properties of the mixtures also changed with increasing 4HB content.
Article
Multidisciplinary Sciences
Khunanya Janchai, Takumitsu Kida, Masayuki Yamaguchi, Takenobu Sunagawa, Tetsuo Okura
Summary: The study focuses on the influence of thermal and shear histories on the crystallization rate of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHHx). The shear history has a significant effect on the crystallization rate when the shear rate exceeds the critical value. Spherulite texture can be clearly observed even after the formation of extended chain crystals.
SCIENTIFIC REPORTS
(2023)
Article
Polymer Science
Taku Omura, Tatsuya Goto, Akira Maehara, Satoshi Kimura, Hideki Abe, Tadahisa Iwata
Summary: The thermal degradation behavior of P(3HB-co-16 mol%-4HB) was investigated using spectroscopic analysis and kinetic modeling. Results showed the generation of various degradation products during thermal degradation, with the process occurring in at least two steps. Unzipping degradation of 3HB units was observed, which may cease or evaporate an oligomer when reaching a randomly present 4HB unit.
POLYMER DEGRADATION AND STABILITY
(2021)
Review
Polymer Science
Ineke Velghe, Bart Buffel, Veerle Vandeginste, Wim Thielemans, Frederik Desplentere
Summary: This review paper provides an overview of the state of the art on process-induced degradation of poly(lactic acid) (PLA) and the relative importance of different processing variables. The review focuses on degradation during melt processing techniques, such as injection molding and extrusion, and discusses general processing and fundamental variables, material properties for monitoring degradation, the effects of processing variables, and additives for melt stabilization. Despite existing knowledge on degradation reactions and their effects on PLA properties, gaps still remain in selecting and predicting processing conditions that minimize process-induced degradation.
Article
Polymer Science
Lubos Behalek, Jan Novak, Pavel Brdlik, Martin Boruvka, Jiri Habr, Petr Lenfeld
Summary: The study investigates the physical properties and non-isothermal crystallization kinetics of PLLA and PHBV biobased polymers after reprocessing, with PLLA showing significant structural changes and PHBV showing no significant impact on non-isothermal crystallization kinetics. Additionally, the thermomechanical behavior of reprocessed PHBV suggests its technological waste can be recycled as a reusable additive to virgin polymer matrix, while reprocessed PLLA exhibited decreased tensile and flexural strength with each recycling cycle.
Article
Polymer Science
Mujtahid Kaavessina, Sperisa Distantina, Esa Nur Shohih
Summary: This research demonstrates that the molecular weight of PLA and urea content in SRF affect the release rate, with diffusion within the matrix dominating the urea release process. Empirical models indicate a combination of diffusion and degradation mechanisms best fit the experimental data.
Article
Biochemistry & Molecular Biology
Adriana Kovalcik, Jiri Smilek, Michal Machovsky, Michal Kalina, Vojtech Enev, Hana Dugova, Nicole Cernekova, Maria Kovacova, Zdenko Spitalsky
Summary: Fused deposition modelling (FDM) is an additive manufacturing process that allows for the creation of highly precise complex three-dimensional objects, with potential applications in pharmaceutical and medical fields. This study investigated the potential of using poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (P(3HB-co-4HB)) filaments for FDM, focusing on their thermal stability and modification of rheological and mechanical properties through plasticizers or blending with poly(lactic acid). Overall, the plasticized P(3HB-co-4HB) showed promise as a biodegradable polymer candidate for FDM processes, especially when blended with poly(lactic acid).
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Polymer Science
Yaowalak Srisuwan, Yodthong Baimark
Summary: In this study, high-molecular-weight poly(L-lactide)-b-poly(ethylene glycol)-b-poly(L-lactide) triblock copolymer (PLLA-PEG-PLLA) was used as a biodegradable bioplastic. However, its high cost and poor thermal stability limited its applications. Native cassava starch was blended to reduce the production cost and improve the thermal stability. The interaction between starch and PEG increased the thermal stability and phase adhesion, resulting in flexible and hydrophilic films with potential applications in biomedical, packaging, and agricultural fields.
Article
Polymer Science
Eduardo Ruiz-Silva, Mirleth Rodriguez-Ortega, Luis Carlos Rosales-Rivera, Francisco Javier Moscoso-Sanchez, Denis Rodrigue, Ruben Gonzalez-Nunez
Summary: Blends of PLA/LMDPE with different weight ratios were prepared using rotational molding and two mixing strategies, DB and MB. Thermal, morphological, and mechanical analyses showed that the blends' thermal stability, morphology, and mechanical properties were affected by the blending technique. DB generated larger particle sizes compared to MB, and blends with different PLA contents exhibited synergistic effects in tensile and flexural properties.
Article
Biochemistry & Molecular Biology
Kun Chen, Cheng Zhou, Lan Yao, Mengfan Jing, Chuntai Liu, Changyu Shen, Yaming Wang
Summary: Poly(lactic acid) (PLA) based ternary blends were prepared and the phase structures and mechanical properties were investigated. The PLA/PCL/EMA-GMA (80/5/15) blend exhibited the best elongation at break and impact toughness among all compositions, and showed excellent stiffness-toughness balance. The formation of core-shell structures and interfacial adhesion contributed to the toughening mechanism in the ternary blends. This study provides guidance for the preparation and design of partially renewable supertough materials based on PLA that can compete with conventional petro-derived plastics.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Materials Science, Multidisciplinary
Mingshun Zhao, Jinchao Yu, Zongquan Ou, Xiaoxiong Chen, Lizhao Sun, Zhenzhen Wei, Kang Chen, Zhijuan Pan
Summary: Due to their green, low-carbon, and sustainable resource qualities, photochromic PLA fibers are advantageous for smart textiles. However, their stiffness and rough texture can impact textile comfort. In this study, photochromic fibers were created using a scalable melt-spinning approach with PLA and PHBV as fiber-forming polymers and photochromic microcapsules as color indicators. The tenacity of the fibers decreased as the PHBV content increased, but it also enhanced the softness and flexibility of the fibers.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Polymer Science
Iouliana Chrysafi, Nina Maria Ainali, Dimitrios N. Bikiaris
Summary: New block copolymers of PLA-b-PHSu in different mass ratios were synthesized and their thermal and mechanical behavior were studied using TGA, Py-GC/MS, and tensile measurements. The results showed that the copolymers decompose through the beta-hydrogen bond scission and exhibit increased elongation at break with higher PHSu content, indicating potential for further investigation for medical or other uses.
Article
Polymer Science
Magdalena L. Iglesias-Montes, Michelina Soccio, Francesca Luzi, Debora Puglia, Massimo Gazzano, Nadia Lotti, Liliana B. Manfredi, Viviana P. Cyras
Summary: The migration behavior and disintegration of films based on PLA-PHB blends under composting conditions were studied. It was found that plasticized PHB degraded the fastest, with the TB plasticizer speeding up the process. Different degradation mechanisms were identified for PLA and PHB.
Article
Polymer Science
Magdalena L. Iglesias-Montes, Michelina Soccio, Valentina Siracusa, Massimo Gazzano, Nadia Lotti, Viviana P. Cyras, Liliana B. Manfredi
Summary: A fully bio-based blend of poly(lactic acid) and poly(3-hydroxybutyrate) was developed, with improved properties and biodegradability through the addition of chitin nanoparticles. This research shows potential for application as biodegradable packaging materials.
Article
Materials Science, Characterization & Testing
Chao-Tsai Huang, Yi-Hsuan Hsu, Bo-Syuan Chen
Article
Polymer Science
Cian-Fan Syu, Yen-Ting Lin, Yih-Chang Yeh, Trong-Ming Don
POLYMER INTERNATIONAL
(2019)
Article
Polymer Science
Chao-Tsai Huang, Xuan-Wei Chen, Wei-Wen Fu
Article
Green & Sustainable Science & Technology
Chao-Tsai Huang, Jia-Hao Chu, Wei-Wen Fu, Chia Hsu, Sheng-Jye Hwang
Summary: This study investigates the application of fiber-reinforced plastics (FRP) as a lightweight material to replace metal in the manufacturing of transportation vehicles. By studying fiber microstructures and mechanical properties through numerical simulation and experimental studies, it is found that the tensile properties of FRP can be significantly improved when fibers are present. Furthermore, the influence of fiber microstructures on tensile properties of finished parts under different gate designs is explored.
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY
(2021)
Article
Materials Science, Characterization & Testing
Chao-Tsai Huang, Rui-Ting Xu, Po-Hsuan Chen, Wen-Ren Jong, Shia-Chung Chen
Article
Polymer Science
Chao-Tsai Huang, Cheng-Hong Lai
Article
Polymer Science
Po-Wei Huang, Hsin-Shu Peng, Sheng-Jye Hwang, Chao-Tsai Huang
Summary: This study designed an injection molding machine with a low-fracture-fiber mechanism, demonstrating that using a three-stage mechanism can shorten the glass fiber length, increase melt fluidity and fiber ratios, and improve the tensile strength of PP/U-LGF.
JOURNAL OF POLYMER ENGINEERING
(2021)
Article
Polymer Science
Ssu-Yu Lien, Yen-Ting Lin, Trong-Ming Don
Summary: In this study, dual-curable EMA/rGO composite resins were prepared and coated on steel plates to improve corrosion resistance. The specific structure of the EMA resin was prepared through a series of reactions, and the addition of rGO enhanced the surface properties of the coating. Results showed that the addition of rGO significantly reduced the corrosion rate of the steel.
JOURNAL OF POLYMER RESEARCH
(2021)
Article
Polymer Science
Yi-Cheng Huang, Chia-Tien Lee, Trong-Ming Don
Summary: The gelatin/CMCS/P(NI-co-AA) membranes prepared in this study exhibited good biocompatibility, appropriate swelling ratio and water vapor transmission rate, as well as antibacterial and thermo-responsive properties.
JOURNAL OF POLYMER RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Yi-Wun Wang, Ting-Hui Yang, Wen-Shan Yang, Tung-Wen Cheng, Wen-Yen Chiu, Trong-Ming Don
Summary: This study focused on developing a stable suspension of oil-based conductive silver ink and improving its film formability on the substrate. Silver nanoparticles were prepared in water with the addition of oleic acid and butyl amine as co-stabilizing agents. The water medium was replaced with an organic solvent to create the organic silver conductive ink. The synthesized silver nanoparticles were stabilized by the hindrance of oleic acid, and the stability was higher in cyclohexane compared to hexane. Conductive films were obtained by drop-coating the organic silver ink on a glass slide and sintering. The addition of polystyrene improved the wettability, film formability, and integrity of the conductive ink on the substrate.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Green & Sustainable Science & Technology
Chao-Tsai Huang, Jun-Zheng Wang, Cheng-Hong Lai, Sheng-Jye Hwang, Po-Wei Huang, Hsin-Shu Peng
Summary: This study investigates the influence of the flow-fiber coupling effect on the fiber orientation and geometrical change of fiber reinforced thermoplastics through numerical simulation and practical verification. The results show that the presence of flow-fiber coupling requires higher spruce pressure and changes the melt flow front pattern. Furthermore, wider core width for fiber orientation in the flow direction can be obtained with the presence of flow-fiber coupling effect.
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY
(2023)
Article
Polymer Science
Trong-Ming Don, Chen-Han Ma, Yi-Cheng Huang
Summary: In this study, crosslinked ulvan/chitosan complex films were prepared and evaluated for their wound healing properties. The results showed that these complex films had good physiochemical properties and could promote wound healing both in vitro and in vivo. In vitro experiments indicated that the films were biocompatible and promoted cell migration. Animal models demonstrated that the films could promote wound healing in the early stage and accelerate the regeneration of dermal glands and collagen production.
Article
Polymer Science
Chao-Tsai Huang, You-Ti Rao, Kuan-Yu Ko, Chih-Chung Hsu, You-Sheng Zhou, Chia-Hsiang Hsu, Rong-Yue Chang, Shi-Chang Tseng, Likey Chen
Summary: In this study, the formation and physical mechanism of the Core-Skin-Core (CSC) structure in co-injection molding were investigated using numerical simulation and experimental observation. Results showed that the CSC structure morphology is influenced by the skin to core ratio and operation conditions, but remains similar across different systems. The mechanism for the formation of the CSC structure was derived from the movement of the melt front in the numerical simulation.
Article
Polymer Science
Yi-Cheng Huang, Yang-Jie Zeng, Yu-Wei Lin, Hung-Chih Tai, Trong-Ming Don
Summary: A dual pH/thermo-responsive block copolymer was synthesized and used to encapsulate the anticancer drug CPT. The drug carrier showed stable particle size and charge, good biocompatibility with cells, and controlled release and cellular uptake of CPT based on environmental conditions. It exhibited high cytotoxicity against H460 cancer cells, suggesting its potential application in oral administration.
Proceedings Paper
Physics, Applied
Chen-Chieh Wang, Chao-Tsai (CT) Huang, Chih-Chung Hsu, Rong-Yeu Chang, Ryan Huang, Michael F. Huang, Sheng-Jye Hwang
PROCEEDINGS OF PPS-34: THE 34TH INTERNATIONAL CONFERENCE OF THE POLYMER PROCESSING SOCIETY - CONFERENCE PAPERS
(2019)