Improving Poly(ethylene terephthalate) Through Self‐nucleation
Improving Poly(ethylene terephthalate) Through Self‐nucleation
复制标题
通过自成核改进聚对苯二甲酸乙二醇酯
DOI：
10.1002/mame.201200398
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发表时间：
2013
影响因子：
3.9
通讯作者：
A. Tonelli
中科院分区：
文献类型：
--
作者：
Abhay S. Joijode;KaDesia Hawkins;A. Tonelli
在逐渐加入大量快速搅拌的丙酮（p‐PET）后，可通过从三氟乙酸中析出的方法重组接收到的聚对苯二甲酸乙酯（asr‐PET）。与asr‐PET不同，p‐PET从熔体中快速重复结晶，并且可以少量（几%）用作有效的自成核剂来控制和改善asr‐PET的整体半晶形态和性能。Nuc - PET薄膜具有显著提高的硬度和杨氏模量，并且对二氧化碳的渗透性更低，而其未拉伸的纤维具有更高的韧性和模量。因为nuc‐PET不含不相容的添加剂，它可以很容易地回收。
As‐received poly(ethylene terephthalate) (asr‐PET) may be reorganized by precipitation from trifluoroacetic acid upon gradual addition to a large excess of rapidly stirred acetone (p‐PET). Unlike asr‐PET, p‐PET repeatedly crystallizes rapidly from the melt, and can be used in small quantities (a few %) as an effective self‐nucleating agent to control and improve the bulk semi‐crystalline morphology and properties of asr‐PET. Nuc‐PET film has significantly increased hardness and Young's modulus and is much less permeable to CO2, while its un‐drawn fibers exhibit higher tenacities and moduli. Because nuc‐PET contains no incompatible additives, it may be readily recycled.