The true molecular weight distributions of acrylate polymers formed in propagating fronts

Willis, Jason R.; Khan, Akhtar M.; West, William W.

doi:10.1002/(sici)1099-0518(19960430)34:6<991::aid-pola8>3.0.co;2-l

Cited by 33 publications

(32 citation statements)

References 5 publications

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“…Pojman et al investigated the molecular weight distributions for poly(n-butyl acrylate) produced frontally and found the trend that one would expect from the classical steadystate theory of free-radical polymerization (9). Poly(n-butyl acrylate) produced in fronts had unimodal molecular weight distributions with M w < 10 5 (M w /M n = 1.7 -2.0).…”

Section: Properties Of Polymersmentioning

confidence: 99%

“…Frontal polymerization works with a wide variety of systems and has been demonstrated with neat liquid monomers such as methacrylic acid, (6,(8)(9)(10) n-butyl acrylate (10 ), styrene, methyl methacrylate, and triethylene glycol dimethacrylate (77). Fronts can also be performed with solid monomers such as acrylamide (with initiator) (72) or transition metal nitrate acrylamide complexes (without initiator) (73).…”

Section: Basic Phenomenamentioning

confidence: 99%

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Frontal Polymerization: Self-Propagating High-Temperature Synthesis of Polymeric Materials

Fortenberry

Hussain

Ilyashenko

1997

Synthesis and Characterization of Advanced Materials

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Section: Properties Of Polymersmentioning

confidence: 99%

Section: Basic Phenomenamentioning

confidence: 99%

Frontal Polymerization: Self-Propagating High-Temperature Synthesis of Polymeric Materials

Fortenberry

Hussain

Ilyashenko

1997

Synthesis and Characterization of Advanced Materials

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“…The glass transition temperature of PHEMA is quite similar to that found for PHEMA gels prepared in the present investigation (77 vs. 79°C). We did not measure the molecular weights of the homopolymers, since there is a high probability of obtaining inaccurate results due intramolecular reactions, as observed with poly(methacrylic acid) [23]. …”

Section: Other Characterizationmentioning

confidence: 99%

“…The phenomenon has been extensively investigated recently [10][11][12][13][14][15][16][17][18][19][20][21][22][23] and a variety of polymers have been synthesized. Advantages ascribed to FP are: (i) reduced waste, (ii) reduced energy costs, (iii) generation of unique morphologies, and (iv) rapid polymerization [16].…”

Section: Introductionmentioning

confidence: 99%

Gel formation in frontal polymerization of 2-hydroxyethyl methacrylate

et al. 2004

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Frontal polymerization of 2-hydroxyethyl methacrylate was investigated to study the effect of type and concentration of initiator, solvent and diluent on the existence of a front, on front velocity as well as front temperature. A significant effect of the type of initiator and its concentration was recorded. Poly(2-hydroxyethyl methacrylate) (PHEMA) was obtained predominantly as a gel. The different gels were evaluated for water and cyclohexane gain and porosity, and the mechanism of gel formation is discussed. Amongst the three diluents used (silica gel, β-cyclodextrin and silica sol), gel formation was highest in the presence of silica sol (≈ 42%). Pore dimensions were less than 15 nm and pore size distribution was narrow. PHEMA networks showed significantly higher water regain due to swelling than attributed to the pore volume as estimated by mercury porosimetry or cyclohexane regain. Kinetics of the equilibrium swelling ratio was studied.

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“…Using methyl methacrylate as the monomer, Chechilo et al showed how the front velocity and the polymer composition are in uenced by initiator species, initiator concentration and pressure change (Chechilo et al, 1972;Chechilo and Enikolopyan, 1974, 1976. Subsequent experimental work (Pojman, 1991;Pojman et al, 1995Pojman et al, , 1996bKhan and Pojman, 1996) demonstrated free-radical frontal polymerization for a variety of monomers. Most of these experiments used liquid undiluted monomers.…”

Section: Introductionmentioning

confidence: 99%