以双苯胺为原料的生物基线性聚氨酯的合成与表征

IF 7.4 2区 化学 Q1 POLYMER SCIENCE
Yoshihiro Minegishi, Tadahisa Iwata, Yukiko Enomoto
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引用次数: 0

摘要

开发具有优异热性能和机械性能的生物基聚合物对于创造可持续的高性能塑料至关重要。具有高耐热性、刚性和加工性的线性芳香族生物基聚氨酯(pu)的合成在很大程度上仍未开发。在此,我们报道了一系列生物基线性芳香性pu的合成,这些pu是由双苯胺(DV)衍生的二醇和各种二异氰酸酯合成的。不同侧链长度(甲基或丁基)的dvpu均分子量(Mw)在5.0 × 103 ~ 6.3 × 105之间。热重分析(TGA)发现dvpu的5%分解温度(Td, 5%)在242 ~ 310℃之间。动态力学分析(DMA)表明,dvpu的玻璃化转变温度(Tg)为16 ~ 167℃。值得注意的是,由甲基侧链DVA和六亚甲基二异氰酸酯(HDI)制备的特定DVPU形成了透明的自立膜,拉伸强度为68 MPa,杨氏模量为1.4 GPa。这种线性生物基pu具有很高的热稳定性、机械强度和光学清晰度。本研究提出了一种新的分子设计策略,用于开发可持续的,耐热的芳香聚合物,显着扩大了高性能生物塑料的生物基pu的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Synthesis and characterization of bio-based linear polyurethanes derived from divanillin
The development of bio-based polymers with superior thermal and mechanical properties is essential for creating sustainable high-performance plastics. The synthesis of linear aromatic bio-based polyurethanes (PUs) with high thermal resistance, rigidity, and processability remains largely unexplored. Herein, we report the synthesis of a series of bio-based linear aromatic PUs from divanillin (DV)-derived diols and various diisocyanates. DV-based PUs (DVPUs) with different side-chain length (methyl or butyl) had weight-average molecular weights (Mw) ranging from 5.0 × 103 to 6.3 × 105. Thermogravimetric analysis (TGA) found 5% decomposition temperatures (Td, 5%) of DVPUs ranging from 242 to 310 °C. Dynamic mechanical analysis (DMA) revealed that DVPUs exhibited a glass transition temperature (Tg) of 16–167 °C. Notably, a specific DVPU prepared from DVA with methyl side-chains and hexamethylene diisocyanate (HDI) formed a transparent, self-standing film with a tensile strength of 68 MPa and a Young’s modulus of 1.4 GPa. This linear bio-based PUs have achieved high thermal stability, mechanical strength, and optical clarity. This research presents a new molecular design strategy for developing sustainable, heat-resistant aromatic polymers, significantly expanding the potential of bio-based PUs for high-performance bio-plastics.
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来源期刊
Polymer Degradation and Stability
Polymer Degradation and Stability 化学-高分子科学
CiteScore
10.10
自引率
10.20%
发文量
325
审稿时长
23 days
期刊介绍: Polymer Degradation and Stability deals with the degradation reactions and their control which are a major preoccupation of practitioners of the many and diverse aspects of modern polymer technology. Deteriorative reactions occur during processing, when polymers are subjected to heat, oxygen and mechanical stress, and during the useful life of the materials when oxygen and sunlight are the most important degradative agencies. In more specialised applications, degradation may be induced by high energy radiation, ozone, atmospheric pollutants, mechanical stress, biological action, hydrolysis and many other influences. The mechanisms of these reactions and stabilisation processes must be understood if the technology and application of polymers are to continue to advance. The reporting of investigations of this kind is therefore a major function of this journal. However there are also new developments in polymer technology in which degradation processes find positive applications. For example, photodegradable plastics are now available, the recycling of polymeric products will become increasingly important, degradation and combustion studies are involved in the definition of the fire hazards which are associated with polymeric materials and the microelectronics industry is vitally dependent upon polymer degradation in the manufacture of its circuitry. Polymer properties may also be improved by processes like curing and grafting, the chemistry of which can be closely related to that which causes physical deterioration in other circumstances.
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