期刊
MATERIALS TODAY COMMUNICATIONS
卷 29, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.mtcomm.2021.102851
关键词
layered double hydroxides; green route; poly(vinyl chloride) (PVC); particle size; thermal stabilizer
资金
- National Natural Science Foundation of China [21627813, 21761029, U1707603]
- First Division Alar Science and Technology Plan Project in Xinjiang Corps [2019GJJ04]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT1205]
- Distinguished professor of Kunlun scholars in Tarim University
The study utilized the salt-oxide/hydroxide route to fabricate a series of Mg-2Al-CO3-LDH samples with different particle sizes, which showed excellent dispersibility and environmentally friendly thermal stability in PVC after surface-organo-modification. Among them, the sample with an average particle lateral size of approximately 220±10 nm demonstrated the best performance for thermal stability in PVC polymer.
Developing green thermal stabilizer for poly(vinyl chloride) (PVC) today is a great challenge for materials as polymer filler. Here, the salt-oxide/hydroxide route in mild conditions is used to fabricate a series of Mg-2Al-CO3-LDH samples from Mg(OH)(2) precursors with different average particle sizes from 202 +/- 10 nm to 334 +/- 13 nm. A linear correlation is observed for the lateral size of the platelets between Mg2Al-CO3-LDH samples and their associated Mg(OH)(2) precursors. After surface-organo-modification (SOM), organophilic Mg2Al-CO3-LDH samples are found to be highly dispersed into PVC and investigated as environment-friendly thermal stabilizers. From the static/dynamic tests, the performances are strongly enhanced and related to the particle size of the LDH stabilizer, with the yellowish color aspect appearing later than for the commercial HT-3/PVC. Among the LDH series, the platelets with an average particle lateral size of about 220 +/- 10 nm perform the best for the thermal stability for PVC polymer. Among the series, the corresponding PVC composite film presents comparatively the minimum color value in static/dynamic discoloration test, exhibiting the longer ignition time for proton initial release as well as the longer stability time in dehydrochlorination test. It underlines that the salt-oxide/hydroxide route is an efficient and environmentally friendly process in producing high-performance green LDH stabilizer for PVC.
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