文档介绍：河北工业大学硕士学位论文
双氧水法制备发泡剂偶氮二甲酰胺及其改性研究
摘要
偶氮二甲酰胺(发泡剂 ADC)是橡塑制品中使用最广泛的有机发泡剂。发泡剂
ADC 具有发气量大,分解产物无毒、无污染,价格便宜等优点。但是其分解温度高,
分解速度快,不能满足所有的发泡制品的加工需要。为了使其能更广泛地应用于各种
发泡制品,通常添加一种或几种活化剂对其性能进行改性。
本文研究了用双氧水法制备的丁酮连氮和尿素、水一步法合成联二脲,生成的联
二脲用双氧水氧化制备偶氮二甲酰胺,考察了各步合成中反应条件对产品质量的影
响,用 IR、NMR、DSC、TG-DTA 对产品的结构和物性进行了表征。并考察了不同
种类的活化剂不同添加量时对发泡剂 ADC 性能的改变。
用该合成路线制备的发泡剂 ADC 的性能达到了化工行业执行标准 HG/T
2097-2008 的优等品指标。通过改变乙酸锌、氧化锌、硬脂酸锌、硬脂酸钙、硬脂酸、
尿素、乌洛托品、碳酸氢钠、柠檬酸等活化剂的用量,可以不同程度地改变发泡剂
ADC 的分解温度和发气量。
与传统工艺相比,该工艺反应流程短,能耗低、环境污染小,是理想的合成方法。
改性的发泡剂 ADC 拓展了在发泡制品中的应用范围。
关键词:偶氮二甲酰胺,发泡剂 ADC,双氧水法,丁酮连氮,联二脲,改性
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河北工业大学硕士学位论文
STUDY ON PREPERATION AND MODIFICATION
OF AZODICARBONAMIDE BLOWING AGENT
WITH HYDROGEN PEROXIDE OXIDATION
ABSTRACT
Azodicarbonamide (ADC blowing agent) is a kind of widely anic foaming
agent in rubber and plastic products. ADC blowing agent has lots of advantages with large
gas production, non-toxic, non-polluting properties, and cheap price and so on. But its high
position temperature and position rate can not meet processing needs for all of
the foaming products. In order to make it more widely used in a variety of foaming
products, one or several active agents are often added to modify its performances.
In this paper, biurea was essfully synthesized using ketazine, urea and water by
one-step process, and the synthesized biurea was oxidized by hydrogen peroxide to prepare
azodicarbonamide. The reaction conditions of affecting quality of products were studied.
The structure and physical properties were confirmed by IR, NMR and TG-DTA, DSC.
And the ADC performances were studied when different amount and types of active agents
were changed.
The azodicarbonamide synthesized by the synthetic method achieved excellent quality
of product as stated in HG/T 2097-2008. The position temperature and gas evolution
of ADC blowing agent were controled in some extent by changing activator amounts of
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