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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effect of nonmodified and organically modified montmorillonite incorporation on polyamide 6/acrylonitrile-ethylene-propylene-diene-styrene/methyl methacrylate-co-maleic anhydride system

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Author(s):
de Oliveira, Amanda Dantas [1] ; de Castro, Lucas Daniel Chiba [2] ; Goncalves Beatrice, Cesar Augusto [3] ; de Almeida Lucas, Alessandra [3] ; Pessan, Luiz Antonio [3]
Total Authors: 5
Affiliation:
[1] Univ Fed Pelotas, Technol Dev Ctr, Pelotas, RS - Brazil
[2] Univ Sao Paulo, Sao Carlos Inst Phys, Sao Paulo - Brazil
[3] Univ Fed Sao Carlos, Dept Mat Engn, Grad Program Mat Sci & Engn, Sao Carlos - Brazil
Total Affiliations: 3
Document type: Journal article
Source: POLYMER CRYSTALLIZATION; OCT 2021.
Web of Science Citations: 0
Abstract

Nanocomposites based on polyamide 6/acrylonitrile-ethylene-propylene-diene-styrene/methyl methacrylate-co-maleic anhydride (PA6/AES/MMA-MA) system were prepared through the incorporation of the nonmodified montmorillonite Cloisite (R) Na+ (Nano Na+) and the organically modified montmorillonite Cloisite (R) 30B (Nano 30B) via melt blending process. Nano Na+ exhibits an intercalated structure with large tactoids and mechanical performance comparable to the ternary blend. On the other hand, Nano 30B exhibits exfoliated structure and a significant enhancement of stiffness as a result of the high interaction between PA6/Cloisite (R) 30B. After an extensive investigation concerning the crystalline structure of the nanocomposites, we hypothesized that such high interaction between PA6/Cloisite (R) 30B hampers the crystallization process of PA6, so small and imperfect gamma-crystals were predominantly formed in Nano 30B. In turn, the low interaction between PA6/Cloisite (R) Na+ did not negatively affect the PA6 crystallization process; quite the opposite, we believe that the large tactoids observed in Nano Na+ might be acting as nucleation sites, resulting in a large degree of crystallinity and a considerable ratio of alpha-phase. (AU)

FAPESP's process: 20/02938-0 - Coloured patterns based on bioinspired photonic crystals for mechanocromic applications
Grantee:Lucas Daniel Chiba de Castro
Support Opportunities: Scholarships in Brazil - Post-Doctoral