| 塑化聚乙烯醇的流变性能及发泡行为研究 |
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| 引用本文： | 吴文倩;贾青青;高伦巴根;项爱民.塑化聚乙烯醇的流变性能及发泡行为研究[J].中国塑料,2011,25(8):69-74. |
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| 作者姓名： | 吴文倩;贾青青;高伦巴根;项爱民 |
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| 作者单位： | 北京工商大学 北京工商大学 |
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| 基金项目： | 北京工商大学研究生科研创新基金(19000101026) |
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| 摘 要： | 采用毛细管流变仪对PVA流变性能进行了表征，用差示扫描量热仪（DSC）研究了降温速率对PVA结晶性能的影响，通过PVA添加化学发泡剂熔融挤出的方法制备PVA发泡材料，并用扫描电镜和密度测试仪分别对发泡材料的泡孔形态和密度进行了表征。结果表明，PVA对剪切作用非常敏感，在低剪切速率下熔体粘度较大，泡孔分布均匀，材料密度较小，在高剪切作用下熔体强度低，气体容易逃逸，导致发泡材料泡孔破裂或合并；低降温速率下熔体粘度小，泡孔易合并、塌陷，合适的降温速度下，PVA熔体粘度适中，发泡材料气泡尺寸小、分布均匀，较快的降温速度下，由于气体压力过大而造成气泡合并，联通，材料密度大。
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| 关 键 词： | 聚乙烯醇 流变性能 结晶性能 泡孔形态 表观密度 |
| 收稿时间： | 2011-7-22 |
Rheological and Foaming Behaviors of Plasticized Poly(vinyl alcohol) |
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| WU Wenqian,JIA Qingqing,GAOLUN Bagen,XIANG Aimin.Rheological and Foaming Behaviors of Plasticized Poly(vinyl alcohol)[J].China Plastics,2011,25(8):69-74. |
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| Authors: | WU Wenqian JIA Qingqing GAOLUN Bagen XIANG Aimin |
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| Affiliation: | WU Wenqian,JIA Qingqing,GAOLUN Bagen,XIANG Aimin*(School of Materials and Mechanical Engineering,Beijing Technology and Business University,Beijing 100048,China) |
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| Abstract: | The rheological behavior of plasticized poly(vinyl alcohol)(PVA) was investigated with capillary rheometer.The effect of cooling rate on crystallization properties of PVA was studied with differential scanning calorimetry analyzer(DSC).The PVA foams were fabricated by filling chemical foaming agent through melt extrusion,and the cell morphology and the density of the foams were investigated with scanning electron microscope(SEM) and density tester.It showed that PVA was sensitive to the shearing effect.At l... |
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| Keywords: | poly(vinyl alcohol) rheological behavior crystallization cell morphology apparent density |
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