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Starch grafted poly-hydroxy alkyl-acid esters were prepared via graft polymerization.Different characteristics of grafted starches were tested such as viscosity,viscosity stability,adhesion as well as properties of sized yarns.Sizing performance was analyzed from the aspect of physical and chemical reactions between polymer molecules.It shows that starch grafted poly-hydroxy alkyl-acid esters have excellent sizing performance and could absolutely be used as sizes for polyester-cotton yarns. 相似文献
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大袋蛾越冬期天敌及生物抑制作用研究 总被引：2，自引：0，他引：2
通过定点调查、室内饲养观察和镜检，已确定在皖北地区大袋蛾越冬期主要天敌有１５种，其中：寄生性天敌９种，寄生率为２８．７％；捕食性天敌４种，其中鸟类捕食率为１５．４％；病原微生物２种，核型多角体病毒和白僵菌感染致死率分别为３．９％和１．６％．四斑尼尔寄蝇和灰喜鹊是皖北地区大袋蛾天敌的优势种，应加以保护利用 相似文献
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