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层状双氢氧化物片晶对全同立构聚丙烯结晶行为的尺寸效应

Size Effect of Layered Double Hydroxide Platelets on the Crystallization Behavior of Isotactic Polypropylene.

作者信息

Liao Hui, Jia Yingqi, Wang Lumei, Yin Qing, Han Jingbin, Sun Xiaoli, Wei Min

机构信息

State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China.

出版信息

ACS Omega. 2017 Aug 4;2(8):4253-4260. doi: 10.1021/acsomega.7b00621. eCollection 2017 Aug 31.

DOI:10.1021/acsomega.7b00621
PMID:31457718
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6641887/
Abstract

Layered double hydroxide (LDH) platelets with nanosized and microsized level were synthesized and used as fillers in an isotactic polypropylene (PP) matrix. The nucleation and crystallization behavior of PP/LDH composites (denoted as 1-PPL and 2-PPL for composites containing nanosized and microsized LDH, respectively; represents the mass percentage of LDH) was investigated by differential scanning calorimetry and polarized optical microscopy techniques. It is found that the crystallization temperature of PP/LDH composites is largely enhanced and the half crystallization time is reduced remarkably relative to pure PP, especially for 2-PPL composite. The 2-PPL composite exhibits stronger heterogeneous nucleating ability and faster crystallization rate than 1-PPL samples with the same LDH loading. In addition, the crystallized PP/LDH composites possess significantly enhanced thermal stability, gas barrier, and flame-retardant properties relative to neat PP, which would show a broad application prospect in engineering plastics and packing industry.

摘要

合成了纳米级和微米级的层状双氢氧化物（LDH）薄片，并将其用作等规聚丙烯（PP）基体中的填料。通过差示扫描量热法和偏光显微镜技术研究了PP/LDH复合材料（分别表示为含纳米级LDH的1-PPL和含微米级LDH的2-PPL；代表LDH的质量百分比）的成核和结晶行为。结果发现，相对于纯PP，PP/LDH复合材料的结晶温度大幅提高，半结晶时间显著缩短，尤其是2-PPL复合材料。在相同LDH负载量下，2-PPL复合材料比1-PPL样品表现出更强的异相成核能力和更快的结晶速率。此外，相对于纯PP，结晶后的PP/LDH复合材料具有显著增强的热稳定性、气体阻隔性和阻燃性能，在工程塑料和包装行业具有广阔的应用前景。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5669/6641887/d7864a0dc014/ao-2017-00621c_0009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5669/6641887/dd9452fb98e9/ao-2017-00621c_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5669/6641887/cbcccf8c237d/ao-2017-00621c_0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5669/6641887/6856af74f305/ao-2017-00621c_0008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5669/6641887/0fe0f998fd2d/ao-2017-00621c_0010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5669/6641887/d7864a0dc014/ao-2017-00621c_0009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5669/6641887/c51c14c49e85/ao-2017-00621c_0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5669/6641887/ba4d7c443b78/ao-2017-00621c_0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5669/6641887/16e3973973a3/ao-2017-00621c_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5669/6641887/da0896f76d69/ao-2017-00621c_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5669/6641887/dd9452fb98e9/ao-2017-00621c_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5669/6641887/cbcccf8c237d/ao-2017-00621c_0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5669/6641887/6856af74f305/ao-2017-00621c_0008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5669/6641887/0fe0f998fd2d/ao-2017-00621c_0010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5669/6641887/d7864a0dc014/ao-2017-00621c_0009.jpg

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本文引用的文献

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