Science and Technology of Ultrasonic Devulcanization of Rubbers

橡胶超声脱硫科学与技术

基本信息

  • 批准号:
    9712043
  • 负责人:
  • 金额:
    $ 31.25万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    1997
  • 资助国家:
    美国
  • 起止时间:
    1997-09-01 至 2000-12-31
  • 项目状态:
    已结题

项目摘要

The main objective of this research project is to develop basic knowledge and to design high capacity equipment for the new technology of continuous devulcanization of different kinds of reinforced and nonreinforced vulcanized elastomers. Through the application of certain levels of ultrasonic amplitudes in special devices, the three-dimensional network can be broken down within a short period of time of the order of a second or even less. As the most desirable consequence, ultrasonically treated rubber becomes soft thereby enabling this material to be reprocessed, shaped, and revulcanized. Under certain processing conditions, the tensile strength of revulcanized rubber is much higher than that of original vulcanizates. This study outlines a series of experiments to (1) identify the effect of the chemical structure of vulcanized rubber on the devulcanization process; (2) evaluate the effect of the type and amount of filler on the devulcanization process; (3) investigate the effect of the ratio of bond energy of the main chain and that of crosslinks and rubber-filler bonds on the break up of the three dimensional rubber network; (4) establish optimal conditions for the devulcanization and revulcanization process enabling one to obtain reclaimed rubbers with better mechanical properties; (5) design new equipment for continuous devulcanization of vulcanized elastomers; and, (6) develop the theory of ultrasonic devulcanization based not only on the process of cavitation collapse but also accounting for the network degradation owing to dynamic fatigue in the vicinity of stable pulsating cavities. Since the dynamic fatigue processes are specific to polymer chemical structure as well as to rubber network topology, the theory may be able to predict optimal conditions of ultrasonic devulcanization for different types of crosslinked rubbers. The development and application of this novel technique for reclaiming all industrially important types of rubber, including tire rubber, will have a signific ant impact on the further expansion of recycling technology. Development of a theoretical model of the process of ultrasonic devulcanization, allowing one to predict optimal conditions of recycling, will help to devise a methodology to control the properties of reclaimed rubber products. The new science-based technology can revolutionize the way rubber is recycled.
该研究项目的主要目标是为不同种类的增强和非增强硫化弹性体的连续脱硫新技术发展基础知识并设计高产能设备。 通过在特殊装置中应用一定水平的超声波振幅,可以在一秒甚至更短的时间内打破三维网络。 最理想的结果是,经过超声波处理的橡胶变软,从而使该材料能够进行再加工、成型和再硫化。 在一定的加工条件下,再硫化橡胶的拉伸强度远高于原硫化胶。 本研究概述了一系列实验,以(1)确定硫化橡胶的化学结构对脱硫过程的影响; (2)评价填料的种类和用量对脱硫过程的影响; (3)研究了主链键能与交联键和橡胶-填料键的键能比对三维橡胶网络破坏的影响; (4)建立脱硫和再硫化过程的最佳条件,以获得具有更好机械性能的再生胶; (5)设计新的硫化弹性体连续脱硫设备; (6) 发展超声脱硫理论,该理论不仅基于空化崩溃过程,而且还考虑了稳定脉动空腔附近由于动态疲劳而导致的网络退化。 由于动态疲劳过程特定于聚合物化学结构以及橡胶网络拓扑,因此该理论可以预测不同类型交联橡胶的超声波脱硫的最佳条件。 这种用于回收包括轮胎橡胶在内的所有工业重要橡胶类型的新技术的开发和应用将对回收技术的进一步扩展产生重大影响。 开发超声波脱硫过程的理论模型,使人们能够预测最佳的回收条件,将有助于设计一种控制再生橡胶产品性能的方法。 新的科学技术可以彻底改变橡胶的回收方式。

项目成果

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Avraam Isayev其他文献

Avraam Isayev的其他文献

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{{ truncateString('Avraam Isayev', 18)}}的其他基金

Toward an Environmental Sustainability of the Crosslinked Plastics via Ultrasonic Extrusion
通过超声波挤出实现交联塑料的环境可持续性
  • 批准号:
    1131342
  • 财政年份:
    2011
  • 资助金额:
    $ 31.25万
  • 项目类别:
    Standard Grant
Theoretical and Experimental Studies of Novel Process for Compounding of Carbon Nanotubes and Nanofibers in Polymer Melts
聚合物熔体中碳纳米管与纳米纤维复合新工艺的理论与实验研究
  • 批准号:
    0654326
  • 财政年份:
    2007
  • 资助金额:
    $ 31.25万
  • 项目类别:
    Standard Grant
Frozen-in Birefringence and Optical Performance of Injection/Compression Molded Optical Products: Quantitative Approach
注射/压缩成型光学产品的冻结双折射和光学性能:定量方法
  • 批准号:
    0322920
  • 财政年份:
    2003
  • 资助金额:
    $ 31.25万
  • 项目类别:
    Standard Grant
Ultrasonic Devulcanization of Scrap Tire Rubbers: Science and Engineering
废轮胎橡胶的超声波脱硫:科学与工程
  • 批准号:
    0084740
  • 财政年份:
    2000
  • 资助金额:
    $ 31.25万
  • 项目类别:
    Standard Grant
Basic Studies of Continuous Ultrasonic Devulcanization of Rubbers
橡胶连续超声脱硫的基础研究
  • 批准号:
    9312249
  • 财政年份:
    1994
  • 资助金额:
    $ 31.25万
  • 项目类别:
    Continuing Grant
Industry-University Cooperative Research: A Basic Study of Injection Molding of Rubber Compound
产学合作研究:混炼胶注射成型基础研究
  • 批准号:
    8514952
  • 财政年份:
    1985
  • 资助金额:
    $ 31.25万
  • 项目类别:
    Continuing Grant

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