Non-isothermal Crystallization Kinetics of PVDF/PVB Blends

Yao-jun YANG; Liang LI; Zi WANG; Jun ZHANG; Yi-jin REN

doi:10.14028/j.cnki.1003-3726.2019.08.007

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Non-isothermal Crystallization Kinetics of PVDF/PVB Blends

更新时间：2022-09-02

- Non-isothermal Crystallization Kinetics of PVDF/PVB Blends
- Polymer Bulletin Vol. 32, Issue 8, Pages: 41-51(2019)
- 作者机构：
  
  湖北汽车工业学院材料科学与工程学院，十堰 442002
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2019.08.007
  CLC：
- Published：20 August 2019，
  
  Received：03 January 2019，
  
  Revised：20 May 2019，
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Yao-jun YANG, Liang LI, Zi WANG, Jun ZHANG, Yi-jin REN. Non-isothermal Crystallization Kinetics of PVDF/PVB Blends. [J]. Polymer Bulletin 32(8):41-51(2019)
DOI：

Yao-jun YANG, Liang LI, Zi WANG, Jun ZHANG, Yi-jin REN. Non-isothermal Crystallization Kinetics of PVDF/PVB Blends. [J]. Polymer Bulletin 32(8):41-51(2019) DOI： 10.14028/j.cnki.1003-3726.2019.08.007.

摘要

采用差示扫描量热法测试了在不同降温速率下的聚偏氟乙烯（PVDF），以及不同配比的聚偏氟乙烯（PVDF）/聚乙烯醇缩丁醛（PVB)共混物的DSC曲线，采用Jeziorny法和莫志深法分析了各组样品的非等温结晶动力学。结果表明：在同一降温速率下，PVB含量的增加使得结晶温度范围先减小后增加，峰值温度先升高后降低，结晶度先增大后减小，说明PVB的加入对共混物的结晶起到先促进后抑制的作用；而且随着PVB含量的增加，共混物的

值增大，说明其晶体生长方式从接近二维片晶生长向三维球晶生长转变，PVB的加入促进共混物生成多维复杂晶体。

Abstract

The non-isothermal crystallization of PVDF and different proportions of PVDF/PVB was observed respectively at different cooling rates by differential scanning calorimeter.The non-isothermal crystallization kinetics of both PVDF and different proportions of PVDF/PVB were studied by Jeziorny equation and Mo Zhishen's method. The results show that at the same cooling rate

the increase of PVB content causes the crystallization temperature range to decrease first and then increase

the peak temperature first increases and then decreases

and the crystallinity increases first and then decreases

indicating that the addition of PVB to the crystallization of the blend. It promotes the post-inhibition effect; and the increase of PVB content

the

value of the blend increases

indicating that the crystal growth mode changes from near two-dimensional platelet growth to three-dimensional spherulite growth

and the addition of PVB promotes the blend. Generate multidimensional complex crystals.

关键词

聚偏氟乙烯聚乙烯醇缩丁醛非等温结晶动力学Jeziomy法莫志深法

Keywords

Polyvinylidene fluoridePolyvinyl butyralNon-isothermal crystallization kineticsJeziomy methodMo Zhishen method

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