Article
Polymer Science
Irma Flores, Ricardo A. Perez-Camargo, Elena Gabirondo, Maria Rosaria Caputo, Guoming Liu, Dujin Wang, Haritz Sardon, Alejandro J. Muller
Summary: This study investigates the crystallization behavior and thermodynamic properties of a series of aliphatic polyethers with varying chain lengths. The results indicate that the crystalline structure and thermal behavior are influenced by the chain length and cooling rate from the melt.
Article
Chemistry, Multidisciplinary
Bo Chu, Haoke Zhang, Lanfang Hu, Bin Liu, Chengjian Zhang, Xinghong Zhang, Ben Zhong Tang
Summary: This study reported a linear non-conjugated polyester with yellow-green clusteroluminescence and a high quantum yield, demonstrating the importance of balanced flexibility and rigidity for achieving long-wavelength emission and high efficiency in clusteroluminescence. The research also highlighted the potential application prospects of luminescent polyesters.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Polymer Science
Lizhong Zhou, Linbo Wu, Pengkai Qin, Bo-Geng Li
Summary: Several aliphatic long chain polyesters were synthesized from biobased materials, showing promising biodegradability and superior mechanical and barrier properties compared to widely used copolyesters.
POLYMER DEGRADATION AND STABILITY
(2021)
Article
Chemistry, Multidisciplinary
Hyeonjun Woo, Hara Jeon, Du Chan Jang, Lee Ku Kwac, Hong Gun Kim, Jin-Hae Chang
Summary: Thermotropic liquid crystalline copolyesters were synthesized with varying hydroquinone molar ratios and investigated for their thermal properties and liquid crystalline mesophases. The results showed that a HQ molar ratio of 4 yielded the most stable physical properties and clear liquid crystalline phase.
Article
Materials Science, Composites
Mallampati Somaiah Chowdary, Gujjala Raghavendra, M. S. R. Niranjan Kumar, Shakuntala Ojha, Manne Anupama Ammulu, P. Phani Prasanthi
Summary: Hybrid composites with Kevlar/K, Sisal/S, and Polyester reinforcement, enhanced with varying percentages of Nano clay, demonstrated excellent mechanical properties and erosion wear resistance, particularly suitable for engineering materials in the aviation and automobile industry.
POLYMER COMPOSITES
(2022)
Article
Polymer Science
Pranabesh Sahu, Lav Sharma, Tim Dawsey, Ram K. Gupta
Summary: A series of biobased short-long chain aliphatic polyesters with high molecular weight were synthesized and systematically studied. The molecular weight of the polyesters showed a linear relationship with the chain length of the diols. The odd-even effect of the diol chain length was observed on the crystallinity and thermomechanical properties of the polyesters. Poly(butylene sebacate) exhibited high crystallinity and storage modulus, indicating good processability and thermal stability.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Polymer Science
Yiqing Xia, Shuai Yan, Rui Shi, Linze Liu, Junlong Zhu, Yuntao Zeng, Chen Gao, Wilfred Emori, Yuping Sheng
Summary: In this study, a novel main-chain benzoxazine precursor with cycloaliphatic and aliphatic structures was successfully synthesized. Its chemical structure and polymerization behavior were characterized, and its thermal properties, dielectric properties, surface hydrophobicity, and tensile properties were explored. The synthesized material showed excellent overall performances, qualifying it as a potential candidate for applications in ultra-large-scale integrated circuits and high-performance composites.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Engineering, Environmental
Guoqiang Wang, Jianyu Wang
Summary: Aliphatic polyesters were synthesized using the melt polycondensation method, with 1,12-dodecanediol and aliphatic diacids. Various characterization techniques were used to study their properties. The polyesters had high molecular weight and four of them exhibited flexible molecular chains and a crystalline structure similar to polyethylene. Poly(1,12-dodecylene octanedioate) and poly(1,12-dodecylene sebacate) showed tensile properties similar to polyethylene.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Polymer Science
Mingkun Chen, Zhiguo Jiang, Zhaobin Qiu
Summary: In this study, fully biobased PHFDG copolyesters with varying HDG unit contents were synthesized and their properties compared to PHF and PHDG. The copolymers exhibited HDG content-dependent thermal, crystal, mechanical, and hydrophilicity properties. PHFDG copolymers with low HDG unit content showed comparable or better properties than commercial biodegradable polymers, making them suitable for packaging materials due to their good thermal, mechanical, barrier properties and enhanced hydrophilicity.
Article
Polymer Science
Stephanie F. Marxsen, Manuel Haeussler, Marcel Eck, Stefan Mecking, Rufina G. Alamo
Summary: In this study, the isothermal overall crystallization rates and linear growth rates of four symmetric long-spaced aliphatic polyesters were investigated. It was found that the polyesters exhibited discrete rate minima with increasing crystallization temperature, and the number and depth of these minima depended on the length of the methylene spacer between esters. The occurrence of rate minima could be explained by the self-poisoning feature and the difference in crystal thickness between non-integer and integer layered crystals.
Article
Engineering, Environmental
Min Jiang, Bo-Wen Liu, Feng-Ming He, Qin Zhang, Ao Wang, Hai-Bo Zhao, Li Chen, Yu-Zhong Wang
Summary: We successfully designed and synthesized high-performance polymers with excellent overall properties by simultaneously modulating their chemical constitution and topological conformation. The incorporation of a sidechain caged structure enhanced chain entanglement, leading to improved mechanical strength and heat resistance. Additionally, the flame retardancy of the polymers was significantly enhanced due to the free radical scavenging effect of the phosphorus-based monomer. This work provides a novel method for fabricating high-performance polymers for various applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Biochemistry & Molecular Biology
Qianfeng Wang, Jiayi Li, Jinggang Wang, Han Hu, Yunxiao Dong, Drow Lionel O'Young, Di Hu, Xiaoqin Zhang, Dong-Qing Wei, Jin Zhu
Summary: The demand for sustainable development has led to increasing attention in biobased polyesters due to their adjustable thermal and mechanical properties and biodegradability. In this study, a list of novel aromatic-aliphatic poly(alkylene adipate-co-thiophenedicarboxylate) (PAATh) copolyesters was synthesized using a novel bioderived aromatic diacid. These copolyesters showed high thermal stability, excellent tensile strength, and superior gas barrier performances. The biodegradability of PAAThs was fully evaluated, and the effect of diol components on enzymatic degradation was revealed by computational analysis. This study provides insights into the development of promising substitutes for commercial biodegradable polyesters and sheds light on their complicated degradation mechanisms.
Article
Materials Science, Composites
Juan Li, Bo Li, Shaowen Huang, Shanshan Luo, Shengbao He, Chengtao Gao, Shan Liu
Summary: The surface-grafting modification of nano clay, specifically using epoxy chain extender ADR-4468 to modify pyrophyllite, has yielded ADR-4468-modified pyrophyllite (A-Prl) which has shown to improve the properties of PET and PET/PETG composites. The A-Prl successfully synthesized in this study did not alter the crystal structure of pyrophyllite. Its addition improved the dispersion and crystallization properties of the composites, ultimately enhancing the mechanical performance. The impact toughness of the A-Prl/PET/PETG composite increased by 120% compared to pure PET. This functional additive has the potential to be utilized in the production of high-performance and recyclable PET composites.
POLYMER COMPOSITES
(2022)
Article
Polymer Science
Yuya Watanabe, Riki Kato, Kazuki Fukushima, Takashi Kato
Summary: Aromatic ester triad mesogens are incorporated into biodegradable aliphatic polycarbonate sequences to enhance their physical properties while maintaining degradability.
Article
Polymer Science
Jing Wang, Tian Wang, Qian Jiang, Yuping Zhang, Yuan Qiu, Hong Wang, Guochuan Yin, Yonggui Liao, Xiaolin Xie
Summary: This study successfully synthesized two AIE-active gelators with different liquid crystal properties and gelation capabilities through melt polycondensation. These AIE-active gels show potential applications in temperature sensor and information storage.
MACROMOLECULAR RAPID COMMUNICATIONS
(2022)