This paper introduces modification of poly vinyl acetate by copolymerization and the application state of the modified products.

文章介绍了聚醋酸乙烯酯共聚改性研究及改性产品应用进展情况。

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The optimal grafting condition and parameters of poly (acrylic acid) starch graft copolymer were studied, and the structure of the products was verified using IR spectra.

研究淀粉接枝聚丙烯酸共聚物的最佳接枝条件及相关参数，并利用红外光谱对产品的结构进行验证。

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In 1988, Poly Natural Health Process Pte Ltd was incorporated to control the distribution and international marketing of products manufactured by Poli Medical Company.

1988年，我们成立保利天然保健品(私人)有限公司，负责保利药业公司产品的分销及其在国际市场的推广。

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