| 1. | When aa content was less than 10wt - % , the extent of grafting increased with increasing the content of aa , and the grafting efficiency maintained in a high level of about 80 %
在aa含量低于10时，接枝效率可以保持在80以上； aa含量太多时易产生自聚，使接枝效率大幅度下降。 |
| 2. | However , when aa content exceeded 10wt . - % , the increment of the extent of grafting level off and the grafting efficiency decreased remarkably . afterward hdpe - g - aa / mmt composites and hdpe / mmt composites were prepared via melt compounding
然后用十八烷基季胺盐处理过的钠基蒙脱土( mmt )分别与hdpe以及hdpe - g - aa熔融插层后制备了两种复合材料。 |
| 3. | With increasing the content of ydh151 , the grafting degree increased and the grafting efficiency decreased . however , the content of dcp cannot be added too much so as to avoid the crosslinking reaction between ydh151 and hdpe
但是由于ydh151与hdpe也会发生交联，所以dcp的量不能过多， ydh151的量也在低于10 %为宜， ydh151含量太多时接枝效率大幅度一卜降。 |
| 4. | The grafting degree and grafting efficiency were decreased . the conversion of semi - contionious emulsion polymerization was decreased as the addition of mmt was increased because of the effect of monomer diffusion and decreasing efficiency of intiating agent
半连续乳液聚合法制备abs mmt时，蒙脱土的存在使聚合转化率显著下降，并且mmt粘土含量越高，对乳液共聚合造成的不利影响越大。 |
| 5. | Moreover when aa content exceeded 10wt . - % , the increment of the extent of grafting level off and the grafting efficiency decreased remarkably . then hdpe - g - ydh151 / mmt composites and hdpe / mmt composites were prepared via melt compounding . ftir proved that there were interactions between ydh151 and mmt sheets
接着用十八烷基季胺盐处理过的钠基蒙脱土分别与hdpe以及两种hdpe一物h151熔融插层后制备了三种复合材料，研究了mmt和ydh151间的相互作用对分散和性能的影响。 |
| 6. | This article confirmed the grafting efficiency of starch grafted to acrylic acid and the structure of starch and its grafted matter through the separation , purification and analysis tests to the grafted copolymer and the grafted forked - chain matter produced from the process of this reaction ; and deduced the formula of the velocity of such reaction mentioned above with a calculated result of the apparent activation energy in this reaction by the curve showing the relationship among the consistency of starch , monomer and initiator and the velocity of the grafting copolymerization
摘要对淀粉接枝丙烯酸所得接枝共聚物及接枝侧链物进行分离提纯和分析测试，确定了其接枝效率并表征了淀粉及其接枝物的形态结构；通过分别测定接枝共聚反应速率与淀粉、单体、引发剂浓度的关系曲线，确定了该接枝共聚反应的速率关系式；推算出了反应的表观活化能。 |
| 7. | Preparation , structure and properties of hdpe ~ g ~ aa / mmt nanocomposites melt grafting reaction of hdpe with aa was performed in thermohaake rheomix and hdpe - g - aa with high grafting degree and high grafting efficiency was prepared . the change of torque indicated that the graft copolymerization was existed during melt compounding . the extent of grafting was analyzed by ftir and element analysis
在hdpe中只加过氧化二异丙苯( dcp )时，由于发生交联反应而使平衡扭矩明显增加，熔点和结晶度降低，加入aa后， aa与hdpe的接枝和hdpe自身的交联并存，前者对后者有抑制作用，从而使扭矩下降，熔点和结晶度部分恢复。 |
