NBR/PVC共混胶的结构与性能  

Structures and properties of NBR/PVC blends

作　　者：赵祥迎[1] 柴大程[1] 

机构地区：[1]青岛科技大学橡塑材料与工程教育部重点实验室,山东青岛266042

出　　处：《聚氯乙烯》2010年第10期12-15,27,共5页Polyvinyl Chloride

摘　　要：采用机械共混法和乳液共沉法制备了NBR/PVC共混胶,通过差示扫描量热仪(DSC)和场发射扫描电子显微镜(FE-SEM)对共混胶的微观形貌、结构进行了表征,考察了共混方式和共混胶配比对其力学性能的影响,并比较了共混胶、CPE、P-83对硬质/软质PVC的改性效果。结果表明:①与机械共混胶相比,乳液共沉胶混合得更均匀,分散性更好,其分子级混合程度更好;②乳液共沉胶试样的力学性能在总体上优于机械共混胶;③对于硬质PVC,CPE的改性效果优于其他改性剂;④对于软质PVC,乳液共沉胶的改性效果最好,特别是对撕裂强度的提高非常明显。NBR/PVC blends were prepared by mechanical blending method and emulsion coprecipitation method. The morphology and structure of the rubber blends were characterized by differential scanning calorimetry （DSC） and field emission scanning electron microscopy （FE-SEM）. Influences of blending methods and proportioning ratio of the rubber blends on the mechanical performances of NBR/PVC blends were investigated. The modification effects of NBR/PVC blends, CPE and P-83 on rigid/soft PVC were compared. The results show that. （1） compared with blends prepared by mechanical blending method, blends prepared by emulsion coprecipitation method have better homogeneity, dispersion property, and molecular blending effects; （2） on the whole, the mechanical performances of samples prepared by emulsion coprecipitation method are better than that of samples prepared by mechanical blending method; （3） for rigid PVC, the modification effects of CPE are better than that of other modifiers; （4） for soft PVC, the modification effects of emulsion coprecipitation blends are the best, especially on the increase of tearing strength.

关 键 词：PVC NBR 机械共混 乳液共沉 共混胶 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业]