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231223s2005 xx ||||| 00| ||eng c |
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|a pubmed24n0525.xml
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|a (DE-627)NLM157323889
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|a (NLM)16114101
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Qiu, Furong
|e verfasserin
|4 aut
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|a ESR spin-label study of poly(styrene-co-methacrylic acid)/poly(epsilon-caprolactone) semi-interpenetrating polymer networks with controlled hydrogen-bond interactions
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|c 2005
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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|a Band
|b nc
|2 rdacarrier
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|a Date Completed 16.02.2006
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|a Date Revised 15.11.2012
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|a published: Print
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|a Citation Status MEDLINE
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|a Copyright (c) 2005 John Wiley & Sons, Ltd.
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|a The morphology and miscibility of semi-interpenetrating polymer networks (semi-IPN) prepared with poly(styrene-co-methacrylic acid) [P(S-co-MAA)] of different carboxylic acid contents and poly(epsilon-caprolactone) (PCL) have been studied by ESR spin-label method. The ESR spectra of spin-labeled PCL showed one motional component at any specific temperature. It indicated that the spin-labeled molecules were located in one type of environment. The coexistence of two motional components in the ESR spectra of all semi-IPN samples was observed over a certain temperature range. This phenomenon suggested that the semi-IPNs were not compatible systems; they contained two microphases, a PCL-rich microdomain and a P(S-co-MAA)-rich microdomain. The miscibility could be improved by increasing the carboxylic acid content, which could enhance the hydrogen-bonding interactions between the ester groups of PCL and carboxylic acid groups in P(S-co-MAA). It was also found that the intracomponent cross-linking of the semi-IPNs was not in favor of the miscibility. The microphase separation occurred in all semi-IPNs, even in the samples having strong hydrogen-bonding interactions. With increasing cross-linking density, the microphase separation became more remarkable
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Methacrylates
|2 NLM
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|a Polyesters
|2 NLM
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|a Polymers
|2 NLM
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|a Polystyrenes
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|a methacrylic acid
|2 NLM
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|a 1CS02G8656
|2 NLM
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|a polycaprolactone
|2 NLM
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|a 24980-41-4
|2 NLM
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| 700 |
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|a Chen, Shiming
|e verfasserin
|4 aut
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|a Ping, Zhenghua
|e verfasserin
|4 aut
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| 700 |
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|a Yin, Gongming
|e verfasserin
|4 aut
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|i Enthalten in
|t Magnetic resonance in chemistry : MRC
|d 1985
|g 43(2005), 11 vom: 19. Nov., Seite 918-25
|w (DE-627)NLM098179667
|x 1097-458X
|7 nnns
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| 773 |
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|g volume:43
|g year:2005
|g number:11
|g day:19
|g month:11
|g pages:918-25
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|a GBV_USEFLAG_A
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|a SYSFLAG_A
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|a GBV_ILN_350
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|a AR
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|d 43
|j 2005
|e 11
|b 19
|c 11
|h 918-25
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