Concentration-way profiles and interdiffusion coefficients of contacting compatible polymers by scanning FT-IR microscopy

Neuber, Rolf; Schneider, H.

doi:10.1016/s0032-3861(01)00298-1

Cited by 12 publications

(5 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Blending of two polymers may either result in miscible or immiscible system. Characteristics and morphology of blends of polyvinylidene fluoride and polymethylmethacrylate (PVDF/ PMMA) have been investigated by various techniques such as X-ray, Fourier transform infrared (FTIR), optical, calorimetric, microscopic, and electric measurements [1][2][3][4][5][6]. PVDF and PMMA are completely miscible in the melt and exhibit a lower critical solution temperature around 3308C.…”

Section: Introductionmentioning

confidence: 99%

Effect of PMMA addition on characterization and morphology of PVDF

Elashmawi

Hakeem

2008

Polymer Engineering & Sci

160

View full text Add to dashboard Cite

Polyvinylidene fluoride and polymethylmethacrylate (PVDF/PMMA) films were blended with different concentrations by casting method. Structural, spectroscopic, and morphological characteristics of both the interface and the surface of the films have been investigated. The blends were characterized using X‐ray diffraction (XRD), Fourier transform infrared (FTIR), UV–visible, differential thermal analysis (DTA), and scanning electron microscopy (SEM). All measurements reveal that the blends take place based on the influence of PMMA content on PVDF. FTIR results indicate the possible interactions between carbonyl group of PMMA and CH2 groups of PVDF which indicates the formation of blends. Optical absorption spectra suggested the presence of an optical gap (Eg) which decreased with increasing PMMA content. UV/VIS spectra were characterized by a sharp edge and a window of wavelength range 290–350 nm for some blends. The optical window can be used as an optical sensor or band pass filter. The degree of crystallinity was found to decrease with increasing PMMA content, which was confirmed by XRD and DTA analysis. SEM micrograph shows spherulites which increase with the addition of PMMA and it becomes sharper and contains a longitudinal shape. POLYM. ENG. SCI., 2008. © 2008 Society of Plastics Engineers

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of PMMA addition on characterization and morphology of PVDF

Elashmawi

Hakeem

2008

Polymer Engineering & Sci

160

View full text Add to dashboard Cite

show abstract

“…In the FT‐IR spectra of P2 and P3 block copolymers, similar absorption bands were observed with the typical FT‐IR spectra of PEG‐PCL‐PEG triblock copolymer and PEG–PCL diblock copolymer previously reported in the literature. [ 40–42 ] Figure 4 presents the FTIR spectra of P1. A strong C═O stretch band appeared at 1677 cm −1 in the ester bond.…”

Section: Resultsmentioning

confidence: 99%

“…In the FT-IR spectra of P2 and P3 block copolymers, similar absorption bands were observed with the typical FT-IR spectra of PEG-PCL-PEG triblock copolymer and PEG-PCL diblock copolymer previously reported in the literature. [40][41][42] cm −1 , respectively. Significant peaks confirmed the formation of the P2 and P3 copolymers.…”

Section: Ft-ir Spectrums Of P1-p3mentioning

confidence: 96%

Synthesis and Analysis of Well‐Defined Copolymers via by Combination ROP Technique

Yildiko,

Tanriverdi,

Ata

et al. 2023

Macro Reaction Engineering

View full text Add to dashboard Cite

Herein, the PCL‐PEG‐PCL macro xanthate reversible addition−fragmentation chain‐transfer agent was obtained on the polyethylene glycol (PEG) (600, 1000, and 1500 g/mol) block, after the addition of ɛ‐caprolactone via ring‐opening polymerization. Then, Poly (Styrene‐b‐ԑ‐Caprolactone‐b‐PEG‐b‐ԑ‐Caprolactone‐b‐Styrene) pentablock copolymer was synthesized RAFT solution polymerization technique via mediated PCL‐PEG‐PCL xanthate macro‐RAFT agents and 2,2′‐azobisisobutyronitrile as initiator. The products were demonstrated using Fourier transform infrared spectrophotometer (FT‐IR), proton nuclear magnetic resonance (1H‐NMR), carbon nuclear magnetic resonance (13C‐NMR), differential scanning calorimetry (DSC), and gel permeation chromatography (GPC) analyses. First‐order linear kinetic graphs of the reaction mechanism were observed with an increase in molecular weights (MW) between 16 000 and 36 000 g/mol. The narrow dispersity (Đ = 1.40 – 1.48) polymer formation of styrene (St) controlled by RAFT polymerization confirms the increase in molecular weight according to the polymerization time. The reaction kinetics were first order and the rate constants were found to be k1 = 6.16 × 10−4s−1, k2 = 6.91 × 10−4s−1 and k3 = 7.33 × 10−4s−1. Thermal and spectroscopic analyzes prove that the reactions were carried out successfully.This article is protected by copyright. All rights reserved

show abstract

“…Because of their superior barrier properties, such as the chemical/flame resistance and toughness/flexibility of PVDF,7 along with the hardness, rigidity, low smoke toxicity, and superior transmission/refractive8 properties of PMMA, these blends are of considerable commercial relevance. The characteristics and morphology of PMMA/PVDF blends have been investigated with various techniques such as X‐ray, Fourier transform infrared (FTIR), optical, calorimetric, microscopic, and electrical measurements 9–12. PMMA/PVDF blends are examples of miscibility between an amorphous polymer (PMMA) and a semicrystalline polymer (PVDF).…”

Section: Introductionmentioning

confidence: 99%

Investigation of the structural, thermal, mechanical, and optical properties of poly(methyl methacrylate) and poly(vinylidene fluoride) blends

Pawde

Deshmukh

2009

J of Applied Polymer Sci

View full text Add to dashboard Cite

In this investigation, poly(methyl methacrylate) (PMMA) and poly(vinylidene fluoride) (PVDF) blends (w/w) were prepared in a Brabender (South Hackensack, NJ) plasticorder with a thermoplastic mixing chamber (type W60) preheated at 180 C. These blends were further converted into films by a conventional solution casting method and characterized with Fourier transform infrared spectroscopy, differential scanning calorimetry, X-ray diffraction, mechanical property measurements, impact strength testing, ultraviolet-visible spectroscopy, refractive-index measurements, and contact-angle study. The Fourier transform infrared results indicated that the compatibility between these two systems resulted from hydrogen bonding between the carbonyl group of PMMA and the CH 2 group of PVDF. The thermal analysis showed depressions in the glass-transition temperature, melting temperature, and crystallization temperature. The heat of crystallization increased with an increase in the PVDF content in the blend. An increase in the heat of crystallization meant an increase in the crystallinity. An increase in the cooling rate increased the crystallization rate. The improvement in the mechanical properties of the blend films indicated that the observed behavior was ascribable to a more coherent structure of the blends due to strong specific interactions between PMMA and PVDF chains. The impact strength analysis revealed a substantial increase in the impact strength from 21.64 to 38.52 J/m. Optical absorption spectra suggested the presence of an optical band gap energy that increased with an increase in the PVDF content in the blend. The contact angle against water increased with the PVDF content in the blend film, and this was caused by the hydrophobicity of PVDF due to the CF 2 group of PVDF.

show abstract

Concentration-way profiles and interdiffusion coefficients of contacting compatible polymers by scanning FT-IR microscopy

Cited by 12 publications

References 13 publications

Effect of PMMA addition on characterization and morphology of PVDF

Effect of PMMA addition on characterization and morphology of PVDF

Synthesis and Analysis of Well‐Defined Copolymers via by Combination ROP Technique

Investigation of the structural, thermal, mechanical, and optical properties of poly(methyl methacrylate) and poly(vinylidene fluoride) blends

Contact Info

Product

Resources

About