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中文摘要：
由于资源、环境与可持续发展的要求，有关可再生、可降解的环境友好材料的研究日益增多。天然高分子材料具有良好的生物降解性、生物相容性等优点，备受人们的关注。然而，在加工、储存和使用的过程中，这些材料在受到光、热等外界环境因素作用时，会发生老化，并伴随有黄变的发生。黄变是高分子材料结构发生变化的结果，不仅影响其外观与感官性能，还是其性能发生劣化的信号。本文综述了天然高分子材料黄变方面的研究现状，探讨了其发生黄变的机理，并讨论了减轻其黄变的可能措施。
英文摘要：
Because of the demands from resources, environment and sustainable development, the renewable, degradable and environmental -friendly materials have gained more and more attentions and increasing studies are reported these days. Natural polymer materials have good biodegradability, bioeompatibility and other advantages, causing the great attention of people. However, in the process, use and storage of the natural materials, various changes will occur in them. Yellowing is the result of changes in polymer structure, which affects the appearance of polymer materials. It is a signal of the performance deterioration. In this paper, research progress on the yellowing of natural polymer materials is summarized, with the yellowing mechanism and the possible measures to reduce the yellowing included.
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PREPARATION AND PROPERTIES OF POLYURETHANE FINISHING AGENT USING BUTYLAMINE AS CHAIN-EXTENSION AGENT
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