The phase state of poly(butadiene-b-tert-butyl methacrylate) and poly(ethylene-b-tert-butyl methacrylate) diblock copolymers

F. J.M. Schipper; G. Floudas; S. Pispas; N. Hadjichristidis; T. Pakula

doi:10.1021/ma020540b

The phase state of poly(butadiene-b-tert-butyl methacrylate) and poly(ethylene-b-tert-butyl methacrylate) diblock copolymers

F. J.M. Schipper, G. Floudas^*, S. Pispas, N. Hadjichristidis, T. Pakula

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

We report on the phase state of two new diblock copolymer systems, poly(butadiene-b-tert-butyl methacrylate) (BBMA) and poly(ethylene-b-tert-butyl methacrylate) (EBMA). The EBMA system was synthesized from the BBMA by hydrogenation of the polybutadiene block, thus creating two systems at practically the same volume fractions and identical degrees of polymerization, but with different segment interaction parameters and conformational asymmetries. Hydrogenation of the butadiene block resulted in an increased incompatibility and to an asymmetric phase diagram. In one of the EBMA copolymers with a PE volume fraction f_PE = 0.42, crystallization of the PE blocks was confined by the cylindrical mesophase in a fluid matrix. Upon PE crystallization, the hexagonal order was found to improve significantly following a matrix-assisted reorganization.

Original language	English (US)
Pages (from-to)	8860-8868
Number of pages	9
Journal	Macromolecules
Volume	35
Issue number	23
DOIs	https://doi.org/10.1021/ma020540b
State	Published - Nov 5 2002
Externally published	Yes

ASJC Scopus subject areas

Materials Chemistry
Polymers and Plastics
Inorganic Chemistry
Organic Chemistry

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abstract = "We report on the phase state of two new diblock copolymer systems, poly(butadiene-b-tert-butyl methacrylate) (BBMA) and poly(ethylene-b-tert-butyl methacrylate) (EBMA). The EBMA system was synthesized from the BBMA by hydrogenation of the polybutadiene block, thus creating two systems at practically the same volume fractions and identical degrees of polymerization, but with different segment interaction parameters and conformational asymmetries. Hydrogenation of the butadiene block resulted in an increased incompatibility and to an asymmetric phase diagram. In one of the EBMA copolymers with a PE volume fraction fPE = 0.42, crystallization of the PE blocks was confined by the cylindrical mesophase in a fluid matrix. Upon PE crystallization, the hexagonal order was found to improve significantly following a matrix-assisted reorganization.",

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AU - Floudas, G.

AU - Pispas, S.

AU - Hadjichristidis, N.

AU - Pakula, T.

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Y1 - 2002/11/5

N2 - We report on the phase state of two new diblock copolymer systems, poly(butadiene-b-tert-butyl methacrylate) (BBMA) and poly(ethylene-b-tert-butyl methacrylate) (EBMA). The EBMA system was synthesized from the BBMA by hydrogenation of the polybutadiene block, thus creating two systems at practically the same volume fractions and identical degrees of polymerization, but with different segment interaction parameters and conformational asymmetries. Hydrogenation of the butadiene block resulted in an increased incompatibility and to an asymmetric phase diagram. In one of the EBMA copolymers with a PE volume fraction fPE = 0.42, crystallization of the PE blocks was confined by the cylindrical mesophase in a fluid matrix. Upon PE crystallization, the hexagonal order was found to improve significantly following a matrix-assisted reorganization.

AB - We report on the phase state of two new diblock copolymer systems, poly(butadiene-b-tert-butyl methacrylate) (BBMA) and poly(ethylene-b-tert-butyl methacrylate) (EBMA). The EBMA system was synthesized from the BBMA by hydrogenation of the polybutadiene block, thus creating two systems at practically the same volume fractions and identical degrees of polymerization, but with different segment interaction parameters and conformational asymmetries. Hydrogenation of the butadiene block resulted in an increased incompatibility and to an asymmetric phase diagram. In one of the EBMA copolymers with a PE volume fraction fPE = 0.42, crystallization of the PE blocks was confined by the cylindrical mesophase in a fluid matrix. Upon PE crystallization, the hexagonal order was found to improve significantly following a matrix-assisted reorganization.

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The phase state of poly(butadiene-b-tert-butyl methacrylate) and poly(ethylene-b-tert-butyl methacrylate) diblock copolymers

Abstract

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