Poly(maleic acid-co-acrylic acid) ionomer as nucleating agent on the crystallization behavior and properties of poly(ethylene terephthalate)
Poly(maleic acid-co-acrylic acid) ionomer as nucleating agent on the crystallization behavior and properties of poly(ethylene terephthalate)
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聚马来酸-丙烯酸共聚离聚物作为成核剂对聚对苯二甲酸乙二醇酯结晶行为和性能的影响
DOI：
10.1007/s00289-021-03672-3
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发表时间：
2021-04
期刊：
影响因子：
3.2
通讯作者：
Ping Tang
中科院分区：
文献类型：
--
作者：
Zhang Wei;Hongdong Zhang;Yuliang Yang;Ping Tang
聚对苯二甲酸乙二酯（PET）结晶速率低、成型周期长，限制了其在工程塑料注射成型中的应用。为了克服这一缺点，采用熔融共混的方法将聚马来酸-丙烯酸共聚物（PMA-AA）作为成核剂加入到PET中，研究了其对PET结晶行为的影响。结果表明，加入成核剂后的改性PET样品（MPET）具有更高的分子有序度和更快的结晶速率。利用Avrami方程和Hoffman-Lauritzen理论分析了PMA-AA离聚体诱导MPET的成核机理，发现PMA-AA离聚体的加入提供了更多的成核位点，降低了PET的折叠表面自由能。通过SEM和POM形貌观察，进一步研究了PMA-AA离聚体的成核和分散行为。结果表明，离聚物在PET基体中均匀分散，从而导致MPET的结晶速率比纯PET快。此外，还对PET和MPET的热稳定性、力学性能和阻气性进行了表征。
Polyethylene terephthalate (PET) generally suffers from low crystallization rate and long molding cycle, which limits its application in injection molding of engineering plastics. To overcome the specific shortcoming, polymaleic acid-co-acrylic acid (PMA-AA) ionomer used as a nucleating agent was added to PET by melt blending, and its effect on the crystallization behavior of PET was investigated in this paper. It is indicated that the modified PET samples (MPET) with the addition of nucleating agents exhibit much higher molecular order and faster crystallization rate. The nucleation mechanism of MPET induced by PMA-AA ionomer was analyzed by means of Avrami equation and Hoffman–Lauritzen theory, revealing that the addition of PMA-AA ionomer provides more nucleation sites and reduces the fold surface free energy of PET. The nucleation and dispersion behavior of PMA-AA ionomer were further observed by SEM and POM morphologies. The results demonstrated that ionomer was dispersed homogeneously in the PET matrix, thus leading to faster crystallization rate of MPET than neat PET. In addition, the thermal stability, mechanical properties, and gas barrier of PET and MPET were characterized.
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影响因子：
3.3
作者：
Jiang, X. L.;Luo, S. J.;Chen, X. D.
通讯作者：
Chen, X. D.
影响因子：
5.9
作者：
Xue-Song Wang;Xin-Gui Li;D. Yan
通讯作者：
Xue-Song Wang;Xin-Gui Li;D. Yan
影响因子：
4.2
作者：
Cao, Li;Su, Dunfan;Chen, Xiaonong
通讯作者：
Chen, Xiaonong
影响因子：
9.5
作者：
L. Kravets;S. Dmitriev;A. Gilman;A. Drachev;G. Dinescu
通讯作者：
L. Kravets;S. Dmitriev;A. Gilman;A. Drachev;G. Dinescu
影响因子：
3
作者：
REINSCH, VE;REBENFELD, L
通讯作者：
REBENFELD, L