Examination Techniques

Weill, Francis S.; Bihr, Edmond; Rohmer, P; Zeltner, François

doi:10.1007/978-3-642-96598-2_2

Cited by 1 publication

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“…It was in same order of magnitude as M crit of poly(methyl methacrylate), which lays between 27,000 22 and 30,000 g/mol. 23 By using polymers with different [BA]/[GMA] ratios from 100/0 to 80/20 mol %, we studied the effect of composition on various properties. The average molar mass of polymers was kept constant to M n Ϸ 7500 g/mol for all compositions because the same synthesis conditions were used for all the syntheses.…”

Section: Characterization Of Acrylic Copolymersmentioning

confidence: 99%

Synthesis and photopolymerization of acrylic acrylate copolymers

Valette

Massardier

Pascault

et al. 2002

J of Applied Polymer Sci

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Acrylate-functionalized copolymers were synthesized by the modification of poly(butyl acrylate-coglycidyl methacrylate) (BA/GMA) and poly(butyl acrylateco-methyl methacrylate-co-glycidyl methacrylate).13 C-NMR analyses showed that no glycidyl methacrylate block longer than three monomer units was formed in the BA/ GMA copolymer if the glycidyl methacrylate concentration was kept below 20 mol %. We chemically modified the copolymers by reacting the epoxy group with acrylic acid to yield polymers with various glass-transition temperatures and functionalities. We studied the crosslinking reactions of these copolymers by differential scanning calorimetry to point out the effect of chain functionality on double-bond reactivity. Films formed from acrylic acrylate copolymer precursors were finally cured under ultraviolet radiation. Network heterogeneities such as pendant chains and highly crosslinked microgel-like regions greatly influenced the network structure and, therefore, its viscoelastic properties.

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Section: Characterization Of Acrylic Copolymersmentioning

confidence: 99%