文章摘要
基于相间交联的共混型宽温域阻尼弹性体的制备及机理
Preparation and Damping Mechanism of Polymer Blends with Broad Damping Temperature Range Damping Elastomer Based on Inter-Phase Cross-Linkages
  
DOI:10.16865/j.cnki.1000-7555.2018.02.022
中文关键词: 环氧化天然橡胶  邻苯二甲酸二烯丙酯预聚体  相间交联  宽温域  阻尼材料
英文关键词: epoxidized natural rubber  prepolymers of diallyl phthalate  cross-linkage between phases  wide temperature range  damping material
基金项目:国家自然科学基金资助项目(21073066)
作者单位
程 波,杨一林,李 涛,卢 珣 华南理工大学 材料科学与工程学院,广东 广州 510640 
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中文摘要:
      结合过氧化物硫化体系的硫化过程,提出过氧化二苯甲酰(BPO)可以引发环氧化天然橡胶(ENR)与邻苯二甲酸二烯丙酯预聚体(DAP-A)发生相间交联反应,以改善两相之间的相容性,拓宽ENR/DAP-A 二元共混材料的有效阻尼温域。分别采用硫磺硫化体系和BPO 硫化体系制备的ENR-40(环氧化程度为40%的ENR/DAP-A 二元共混材料)进行对比分析,并利用动态力学分析、差示扫描量热分析以及宽频介电谱论证了上述机理。基于以上机理,进一步探究了共混比例和BPO 用量对ENR-40/DAP-A 二元共混材料阻尼性能的影响,最终制备了一种有效阻尼温域为-33~145 ℃(tanδmin>0.35)的宽温域高阻尼材料。
英文摘要:
      Based on the vulcanization process of peroxide curing system, dibenzoyl peroxide(BPO) can result in inter-phase linkages by triggering reaction between epoxidized natural rubber(ENR) and prepolymers of diallyl phthalate(DAP-A), thus providing an improved compatibility between phases as well as a broadened effective damping temperature range in ENR/DAP-A binary blends. The proposal was demonstrated by DMA, DSC and broadband dielectric spectroscopy(BDRS) of ENR-40/DAP-A binary blends vulcanized by BPO and sulphur, respectively. On the basis of that, different blending ratios and BPO contents were studied to optimize the damping property of ENR-40/DAP-A binary blends and a series of high damping (tanδmin>0.35) binary blends with an effective temperature range of 178 ℃ from -33 ℃ to 145 ℃ were obtained.
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