Characterization of poly(<i>tert</i>‐butyl acrylate) by SEC

Mrkvičková, L.; Daňhelka, J.

doi:10.1002/app.1990.070410746

Cited by 23 publications

(25 citation statements)

References 4 publications

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“…(1) PtBA in THF [16] [η]=3.30×10 −3 M 0.80 (2) 1 H NMR spectra were recorded with a Bruker AM-250 spectrometer by using CDCl 3 as solvent at 25°C. The compositions of the diblocks and the final MTM triblocks were calculated from the relative intensity of the signals for the O-CH 3 protons in PMMA (3.6 ppm), and the -C(CH 3 ) 3 protons in PtBA (1.4 ppm).…”

Section: Discussionmentioning

confidence: 99%

Synthesis of poly(methyl methacrylate)-b-poly(n-butyl acrylate)-b-poly(methyl methacrylate) triblocks and their potential as thermoplastic elastomers

Tong

Jérôme

2000

Polymer

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A series of well defined poly(methyl methacrylate) (PMMA)-b-poly(n-butyl acrylate) (PnBA)-b-PMMA triblock copolymers (MnBM) has been synthesized by transalcoholysis of PMMA-b-poly(tert-butylacrylate) (PtBA)-b-PMMA precursors (MTM) by n-butanol. Phase separation is observed for all the investigated triblock copolymers, which contain PMMA outer blocks in the 5000-50 000 molecular weight (MW) range and PnBA inner blocks with MW in the 100 000-200 000 range. Although the ultimate tensile properties of these MnBM triblock copolymers are poor compared to traditional diene-based TPEs (SBS and SIS), they are much better than those ones reported for PMMA-b-poly(isooctyl acrylate) (PIOA)-b-PMMA triblocks (MIM). A reasonable explanation for this observation is found in the average molecular weight between chain entanglements (M e ) that has been estimated to be 28 000 for the central PnBA rubbery block, which is consistently much smaller than for PIOA (59 000) and substantially higher than M e for polybutadiene (1700) and polyisoprene (6100). The tensile behavior of MnBM copolymers cannot be fitted by either a simple elastomer model free from chain entanglements (suitable to MIM) or by a "filler" modified rubber model (suitable for diene-based TPEs), supporting the hypothesis that the mechanical properties of the investigated (meth)acrylate thermoplastic elastomers are significantly affected by any change in M e of the central acrylate block. Viscoelastic analysis shows that MnBM triblocks are of higher complex viscosity than the SBS and SIS analogs, leading to a shift in the order-disorder transition temperature to much higher temperature, unless the outer PMMA blocks are of very low molecular weight (5000).

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Section: Discussionmentioning

confidence: 99%

Synthesis of poly(methyl methacrylate)-b-poly(n-butyl acrylate)-b-poly(methyl methacrylate) triblocks and their potential as thermoplastic elastomers

Tong

Jérôme

2000

Polymer

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“…The flow rate of THF was 1 ml/min, the system with separation range 10 3 -10 6 Da was calibrated with PMMA or polystyrene standards (PSS Germany). The eluograms of CDA macroinitiators were treated as CDA, those of copolymers with PMMA grafts as PMMA, eluograms of poly(CDA-g-St) as polystyrene [25] and eluograms of poly(CDA-g-BuA) as poly(2-ethylhexyl acrylate) [26]. It has to be noted that the calculated molecular weights of macroinitiators as well as those of copolymers are only apparent values.…”

Section: Analysis Of Polymersmentioning

confidence: 99%

Controlled grafting of cellulose diacetate

Vlček

Janata

Látalová

et al. 2006

Polymer

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“…In the case of the poly(alkyl acrylates) a clear discrepancy between the literature predicted curves44–52 is observed. Although many of the literature predicted curves intersect or closely describe the ESI‐MS measured molecular weight ratios, there is again great scatter among the literature data between 10 and 30%.…”

Section: Resultsmentioning

confidence: 72%

Mark–Houwink Parameters for the Universal Calibration of Acrylate, Methacrylate and Vinyl Acetate Polymers Determined by Online Size‐Exclusion Chromatography—Mass Spectrometry

Gruendling

Junkers

Guilhaus

et al. 2010

Macro Chemistry & Physics

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Size exclusion chromatography coupled online to electrospray ionization mass spectrometry (SEC/ESI‐MS) is employed to establish universal calibration (UC) relationships for a number of linear poly(alkyl acrylates) and poly(alkyl methacrylates) as well as poly(vinyl acetate) synthesized via radical chain transfer polymerization. It is demonstrated that in the analyzed molecular weight range, Mark–Houwink–Kuhn–Sakurada (MHKS) coefficients can be successfully determined in relation to values of pMMA. The agreement between the UC model using mass spectrometry‐derived MHKS coefficients and the measured data was generally better than 10%. The MHKS values reported herein are expected to remain valid up to 20 kDa. A comparison with the outcome of UC using literature reported MHKS coefficients determined by intrinsic viscosity—molecular weight (IV‐MW) measurements is provided. Errors of more than 30% can result when these literature values are employed in the low molecular weight range ($\overline M _{\rm n}$ < 20 kDa). Use of MHKS coefficients derived from IV‐MW measurements in UC is, therefore, strongly discouraged at molecular weights below 20 kDa.magnified image

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Characterization of poly(tert‐butyl acrylate) by SEC

Cited by 23 publications

References 4 publications

Synthesis of poly(methyl methacrylate)-b-poly(n-butyl acrylate)-b-poly(methyl methacrylate) triblocks and their potential as thermoplastic elastomers

Synthesis of poly(methyl methacrylate)-b-poly(n-butyl acrylate)-b-poly(methyl methacrylate) triblocks and their potential as thermoplastic elastomers

Controlled grafting of cellulose diacetate

Mark–Houwink Parameters for the Universal Calibration of Acrylate, Methacrylate and Vinyl Acetate Polymers Determined by Online Size‐Exclusion Chromatography—Mass Spectrometry

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