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首页> 外文期刊>Journal of Applied Polymer Science >Effects of dibutyltin dilaurate and epoxidized soya bean oil on the thermal stability of chlorinated natural rubber from latex
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Effects of dibutyltin dilaurate and epoxidized soya bean oil on the thermal stability of chlorinated natural rubber from latex

机译：二月桂酸二丁锡和环氧大豆油对乳胶氯化天然橡胶热稳定性的影响

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摘要

The effects of dibutyltin dilaurate (DBTL) and epoxidized soya bean oil (EBO) on the dehydrochlorination reaction of chlorinated natural rubber (CNR) from latex were studied by the measurement of the HCl evolving rate during the thermal degradation of CNR and by the determination of the amounts of cyclic conjugated dienes that formed on the CNR molecular chains. During the early stage of the thermal degradation of CNR at 150 degrees C, HCl was eliminated, and the cyclic conjugated dienes formed on the CNR molecular chains. Under the effects of DBTL and EBO, the HCl evolving rates during the early stage of the thermal degradation of CNR were reduced, whereas the amounts of cyclic conjugated dienes formed on the CNR molecular chains were increased. Under the effects of mixtures from the compounding of DBTL with barium stearate or 2,2'methylene-bis(4-methyl-6-tert-butyl-phenol) as well as the compounding of EBO with 2,2'-methylene-bis(4-methyl-6-tert-butyl-phenol), not only the HCl evolving rate from CNR but also the formation of cyclic conjugated dienes decreased, and this indicated that the compounded mixtures had synergistic functions against the thermal degradation of CNR. However, the mixture from the compounding of EBO with barium stearate had no synergistic effect on increasing the thermal stability of CNR. (c) 2005 Wiley Periodicals, Inc.
机译：通过测量CNR热降解过程中HCl的释放速率并测定其含量，研究了二月桂酸二丁基锡（DBTL）和环氧化大豆油（EBO）对氯化天然橡胶（CNR）从胶乳中脱氯化氢反应的影响。在CNR分子链上形成的环状共轭二烯的数量。在150℃下CNR热降解的早期阶段，HCl被消除，并且在CNR分子链上形成了环状共轭二烯。在DBTL和EBO的作用下，CNR热降解早期的HCl释放速率降低，而CNR分子链上形成的环状共轭二烯数量增加。在DBTL与硬脂酸钡或2,2'-亚甲基-双（4-甲基-6-叔丁基-苯酚）混合以及EBO与2,2'-亚甲基-双化合物的混合作用下（4-甲基-6-叔丁基苯酚），不仅降低了CNR的HCl放出速率，而且减少了环状共轭二烯的形成，这表明该混合物具有对抗CNR热降解的协同作用。但是，EBO与硬脂酸钡混合得到的混合物对增加CNR的热稳定性没有协同作用。 （c）2005年Wiley Periodicals，Inc.

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