PVC基阻尼涂料的制备及其流变性能
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Preparation and rheological properties of PVC liquid damping materials
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    摘要:

    以聚氯乙烯(PVC)为基体,对苯二甲酸二辛酯(DOTP)为增塑剂,与无机填料CaCO3、钙锌热稳定剂、乳化剂OP-10、润滑剂液体石蜡等复合改性制备PVC基阻尼材料,采用动态流变仪DHR、动态热机械分析仪DMA、扫描电镜SEM等对试样的性能和形态进行表征。运用正交设计探究各组分对性能的影响规律,结果表明,填料CaCO3和增塑剂DOTP比例对其阻尼性能影响最显著;当PVC: CaCO3: DOTP: OP-10比重为45: 33: 22: 2时,25℃时频率0.01~150 Hz范围内,tan δ最大值从0.497提高到0.604;剪切速率0.1 s-1时表观黏度为3738 Pa·s,剪切速率150 s-1时表观黏度为2.19 Pa·s,具有优异的抗流挂性与稳定性。通过LASD形态分析构建微观聚集态模型,提出刚性填料团聚-解团聚和聚合物微球变形对流变性能的作用机理,为LASD的持续研究提供技术思路和理论基础。

    Abstract:

    PVC-based damping materials are prepared with polyvinyl chloride (PVC) as matrix, dioctyl terephthalate (DOTP) as plasticizer, inorganic CaCO3 as filler, calcium and zinc as heat stabilizer, OP-10 as emulsifier and liquid paraffin as lubricant. Then properties and morphology of the sample were characterized by using DHR, DMA, SEM etc. The orthogonal design was used to explore the influence of each component on the performance. The results show that the ratio of filler CaCO3 and plasticizer DOTP has the most significant effect on its damping performance. When the raito of PVC: CaCO3: DOTP: OP-10 is 45: 33: 22: 2, and the frequency is within the range of 0.01~150 Hz at 25℃, tan δ maximum value increases from 0.497 to 0.604;the apparent viscosity at a shear rate of 0.1 s-1 is 3738 Pa·s, and at a shear rate of 150 s-1 is 2.19 Pa·s, which shows that the sample has excellent sag resistance and stability. The micro-aggregation model was constructed through LASD morphology analysis, and the mechanism of the agglomeration-de-agglomeration of rigid fillers and the deformation of polymer microspheres on rheological properties was proposed, which provided technical ideas and theoretical foundations for the continuous research of LASD.

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汪宇泽,冯阳宁,周溆,郝同辉. PVC基阻尼涂料的制备及其流变性能[J].精细化工,2021,38(6):

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  • 收稿日期:2020-11-02
  • 最后修改日期:2021-02-04
  • 录用日期:2021-02-08
  • 在线发布日期: 2021-04-07
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