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相关概念视频

Types of Step-Growth Polymers: Polyesters01:20

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The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
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Accelerated Curing of Concrete

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Accelerating concrete curing is achieved by applying heat and additional moisture. This process accelerates the hydration of the cement, resulting in an earlier strength gain in the concrete. Steam curing is a method wherein the concrete products are either transported through a chamber on a conveyor belt or encased in plastic, allowing steam at atmospheric pressure to circulate freely around them. This process begins with a phase of moist curing that typically lasts between 3 to 5 hours, after...
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Bioplastics

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Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...
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Polyethylene terephthalate (PET) is a synthetic polymer widely utilized in the packaging industry, particularly for bottles and containers. Due to its chemical stability and durability, PET accumulates in the environment, contributing significantly to plastic pollution. It comprises repeating units of terephthalic acid and ethylene glycol, resulting in a semi-crystalline structure that is resistant to natural degradation processes.A notable breakthrough in plastic biodegradation came with the...
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相关实验视频

Updated: May 5, 2026

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可切割的生物基环氧矩阵用于更生态可持续的热复合材料组件.

Ilaria Rossitti1,2, Arianna Bolis1, Matteo Sambucci1,2

  • 1Department of Chemical Engineering, Materials, Environment, Sapienza University of Rome, 00184 Rome, Italy.

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概括

新的可切割生物基环氧树脂提供了具有可比性能的环保替代品. 这些可回收复合材料可以有效回收矩阵和纤维,促进材料科学中的循环经济.

关键词:
基于生物的热固体复合板材是复合板材的一种.环保环氧系统环保环氧系统热固体的生态回收利用纤维的回收 纤维的回收

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科学领域:

  • 材料科学 材料科学 材料科学
  • 聚合物化学 聚合物化学
  • 可持续工程 可持续工程

背景情况:

  • 传统的耐热环氧树脂在使用寿命结束时会面临挑战.
  • 可切割的生物基环氧系统提供了一个可持续的替代方案.
  • 这些系统通过矩阵和纤维回收实现循环.

研究的目的:

  • 为了表征一种新的商业可切割生物树脂配方.
  • 评估其在聚合物复合材料中的可加工性和可回收性.
  • 调查固化后制度对材料性质的影响.

主要方法:

  • 树脂热稳定性和玻璃过渡温度 (Tg) 的表征.
  • 使用真空辅助树脂转移成型制造复合板材 (玻璃和碳) 的制造.
  • 评估曲行为,微观结构和动态机械性能.
  • 实施用于材料回收的化学回收程序.

主要成果:

  • 不经过固化后的树脂表现出最高的Tg (76.6°C).
  • 在100°C的后固化增强了交叉连接,使曲强度提高了3% (碳) 和12% (玻璃).
  • 在140°C的后固化对机械性能产生了负面影响.
  • 证明了热塑性树脂和纤维的成功回收.

结论:

  • 可裂变的生物树脂配方适合制造完全可回收的聚合物复合材料.
  • 优化后固化 (100°C) 可以提高复合材料的机械性能.
  • 开发的回收过程证实了循环经济方法对这些材料的可行性.