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首页> 外文期刊>Journal of Applied Polymer Science >Urea-activated 4,4 '-oxibis-(benzenesulfonyl hydrazide) as foaming agent for low-density unsaturated polyester resin manufacturing
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Urea-activated 4,4 '-oxibis-(benzenesulfonyl hydrazide) as foaming agent for low-density unsaturated polyester resin manufacturing

机译：尿素活化的4,4'-氧杂双-（苯磺酰肼）作为发泡剂，用于低密度不饱和聚酯树脂的生产

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摘要

The activation of foaming agent is critical to its application. In this study, 4,4 '-oxibis-(benzenesulfonyl hydrazide) (OBSH) activated by urea was used in the manufacture of low-density unsaturated polyester resin (LDUPR), and the results were compared with that of OBSH activated by zinc oxide and zinc stearate. The experiment results showed that the activation of OBSH by urea was better than by zinc oxide or by zinc stearate. A novel hydrogen bond activation mechanism of urea is presented in this research. Two stages, including the induction stage and the foaming stage, were proposed in the LDUPR manufacture according to the gas evolution curves of activated OBSH. The decomposition temperature and the decomposition time of OBSH activated by urea were determined to match the gelation time of UPR for the manufacture of LDUPR. The disadvantageous chemical behaviors of activated OBSH were eliminated in the induction treatment. The activated OBSH via induction treatment released gas maximally and distributed gas homogeneously in the resin glue, resulting in a better foaming effect than that of the previous foaming agents. (C) 2015 Wiley Periodicals, Inc.
机译：发泡剂的活化对其应用至关重要。在这项研究中，尿素活化的4,4'-氧杂双-（苯磺酰肼）（OBSH）用于制造低密度不饱和聚酯树脂（LDUPR），并将结果与​​氧化锌活化的OBSH进行了比较。和硬脂酸锌。实验结果表明，尿素对OBSH的活化作用优于氧化锌或硬脂酸锌。本研究提出了一种新型的尿素氢键活化机理。根据活化的OBSH的气体逸出曲线，在LDUPR的生产中提出了诱导阶段和发泡阶段两个阶段。测定尿素活化的OBSH的分解温度和分解时间，以匹配用于制造LDUPR的UPR的胶凝时间。诱导处理消除了活化的OBSH的不利化学行为。经感应处理的活化的OBSH在树脂胶中最大程度地释放出气体，并使气体均匀分布，与以前的发泡剂相比，发泡效果更好。 （C）2015年Wiley Periodicals，Inc.

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