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- The influence of amount initiator, reaction temperature, polymer degree of protecting colloid have been discussied. 探讨了引发剂用量、聚合反应温度、保护胶体聚合度等因素对接枝反应的影响。
- It is concluded that PAM and EC could be used as protective colloid in the emulsion polymerization of vinyl acetate. 实验结果显示,聚丙烯酰胺、乙基纤维素可以作为醋酸乙烯乳液聚合的保护胶体。
- The emulsion polymerization of vinyl acetate with PAM, CMC and EC in place of PVA as protective colloid were studied. 本文尝试用聚丙烯酰胺、羧甲基纤维素及乙基纤维素代替聚乙烯醇作醋酸乙烯乳液聚合的保护胶体。
- The title emulsion has been prepared based on conventional emulsifier and hydroxyethyl cellulose as protective colloid. 分别采用常规乳化剂和羟乙基纤维素为保护胶体制备丙烯酸酯乳液。
- Influences of content of soft monomer and hard monomer, emulsifiers, initiators, self-crosslinkable monomer and protective colloid on the properties of emulsion are studied. 研究软硬单体含量、乳化剂、引发剂、自交联单体、保护胶体等对聚合物乳液性能的影响。
- This paint is different from the traditional multicolor paint with less equipment during production and no protective colloid is necessary. 该涂料不同于一般多彩涂料，可省去部分分散设备和保护胶分散相，是由底涂漆、中涂漆和面漆组成。
- Using the method of latex polymerization,poly vinyl acetate was synhesized with PVA as protective colloid,which was crosslinked with formylamine-group containing component. 采用乳液聚合的方法,以乙酰化聚乙烯醇为保护胶体合成聚醋酸乙烯乳液,并用含甲酰胺基的乙组分与其交联。
- VAU emulsion was prepared by using acrolein-acetalized poylvinly alcohol as the protective colloid,emulsion polymerizing vinyl acetate and urea treatmelnting. 以丙烯酸对聚乙烯醇进行缩醛化处理，然后以此为保护胶体进行醋酸乙烯乳液聚合。
- The emulsion polymerization process was studied in detail in order tooptimize the choice and amount of emulsifier, initiator, protective colloid, and tackifier. 并研究了其乳液聚合反应行为，讨论了乳化剂、引发剂、保护胶体、增粘树脂选择以及其最佳用量，确定了最佳反应条件，得到与塑料粘结力高且贮存稳定性高、单体转化率达到99%25以上的丙烯酸酯共聚物乳液。
- As to the protective colloid using PVA or polyvinyl formal with the same concentration (7%), when the solid content of white glue enhanced 1%, the adhesive strength of PVAc would increase 0.27MPa and 0.33MPa respectively. 分别以相同浓度(7%25)聚乙烯醇、聚乙烯醇缩甲醛为保护胶体，制得的白乳胶的固含量(即聚醋酸乙烯醋含量)每提高1%25，粘接强度分别提高为0.;27Mpa、0
- Polyvinyl alcohol was used as protective colloid to prepare the PVAC emulsion whose viscosity depended upon the reactivities of polyvinyl alcohol and vinyl acetate. reaction temperature,initator, etc. 本文对以聚乙烯醇作保护胶体的聚醋酸乙烯乳液的粘度的影响因素（如聚乙烯酵、醋酸乙烯活性度、反应温度、引发剂等）及反应机理作了探讨。
- The influence of added methyl acrylate (MA) on the emulsion copolymerization of methacrylic acid (MAA) and chloroprene in the presence of polyvinyl alcohol as a protective colloid was investigated. 摘要 研究了丙烯酸甲酯（MA）对聚乙烯醇为乳化剂的氯丁二烯和甲基丙烯酸乳液共聚合的影响。
- They netted the fruit trees to protect them from birds. 他们用网覆盖住果树以使其免遭鸟害。
- This paper discribes the qualifying synthetic process of polyvinyl acetate emulsion and how to improve white emulsion property of cold resistance by using polyvinyl acetal as protective colloid. 本文阐述了改性聚醋酸乙烯酯乳液的合成工艺：采取聚乙烯醇缩甲醛作保护胶体的措施，改进了白乳胶的耐寒性；
- The results indicated that the stable latex was able to be prepared by HEC as protective colloid and some properties of the latex were better than that of conventional latex,especially the... 结果表明:羟乙基纤维素为保护胶体可制备稳定的醋丙乳液,该乳液具有优良的电解质性能。
- The methods of improving water-resistance of polyvinyl acetate emulsion are reviewed,mainly including copolymerization, addition of compounding agent and modification of protective colloid. 简述了聚醋酸乙烯乳液耐水性改性研究进展情况,包括共聚,共混交联,保护胶体等。
- How can we protect our computer files? 我们怎样才能保护我们的计算机数据？
- She was engaged in protecting wild birds. 她致力於保护野生鸟类的工作。
- A plastic cover protect the computer. 这台计算机由一个塑料防护罩盖着。
- It's our duty to protect the saplings. 保护树苗是我们的责任。
