01768nas a2200229 4500008004100000022001400041245009600055210006900151260010600220300001000326490000700336520090900343653001401252653001501266653001701281653003001298653001901328100001701347700002501364700001901389856013001408 2014 eng d a0014-305700aSynthesis and characterization of hypercrosslinked hydroxyl functionalized co-polymer beads0 aSynthesis and characterization of hypercrosslinked hydroxyl func aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcOCT a46-580 v593 a

Hydroxyl functionalized beaded copolymers were synthesized from 2-hydroxy ethyl methacrylate by suspension polymerization using two different crosslinking agents (EDMA, DVB) and diluents (1,1,2,2-tetrachloroethane, 1,2-dichlorobenzene). Microporous beads with high surface area were successfully synthesized and characterized by different techniques. Maximum surface area obtained was 564 m(2)/g bearing uniform, spherical as well as non-aggregation images of beads. Thermal properties such as DTG and DSC reveal that, type of crosslinker (flexible/rigid) is major while its concentration is minor parameter that affect decomposition and softening temperature of copolymer. Swelling ratio of copolymer beads was examined as a function of crosslinker and crosslink density. Swelling behavior is in accordance with copolymer-solvent interaction parameter. (C) 2014 Elsevier Ltd. All rights reserved.

10aCopolymer10aMorphology10asurface area10aSuspension polymerization10aSwelling ratio1 aMane, Sachin1 aPonrathnam, Surendra1 aChavan, Nayaku uhttps://library.ncl.res.in/content/synthesis-and-characterization-hypercrosslinked-hydroxyl-functionalized-co-polymer-beads-002767nas a2200277 4500008004100000245008200041210006900123260000800192490000800200520188500208653000902093653004202102653002102144653001402165653001502179653001502194653001302209653004702222653001002269100002102279700001702300700002202317700001902339700001902358856011202377 2017 eng d00aThermotropic liquid crystalline polyesters derived from 2-chloro hydroquinone0 aThermotropic liquid crystalline polyesters derived from 2chloro  cSEP0 v1293 a

Synthesis of thermotropic liquid crystalline polyesters derived from bis[4-hydroxy benzoyloxy]-2-chloro-1,4-benzene (BHBOCB) and aliphatic dicarboxylic acid chlorides by interfacial polycondensation methodology is presented. Synthesised polyesters consist of bis[4-hydroxy benzoyloxy]-2-chloro-1,4-benzene as a mesogen and aliphatic diacid chloride as flexible spacer. The length of oligomethylene units in the polymer was varied from the trimethylene to the dodecamethylene groups. Synthesized polyesters were characterized by differential scanning calorimetry and optical microscopy. The transition temperatures and thermodynamic properties were studied for all these polymers. These polyesters exhibited thermotropic liquid crystalline behavior and showed nematic texture except decamethylene spacer. Decamethylene spacer based polyester showed marble texture of smectic C. Mesophase stability of these polyesters was higher than (except first heating cycle of PE-1). 

SYNOPSIS The present study deals with the synthesis of thermotropic liquid crystalline polyesters derived from bis[4-hydroxy benzoyloxy]-2-chloro-1,4-benzene (BHBOCB) and aliphatic dicarboxylic acid chlorides by interfacial polycondensation methodology.

10aacid10aAliphatic Flexible Spacers Main-chain10aAromatic Mesogen10aElastomer10aMorphology10aPolydomain10aPolymers10aThermotropic Liquid Crystalline Polyesters10aUnits1 aManurkar, Nagesh1 aMore, Sayaji1 aMulani, Khudbudin1 aGanjave, Nitin1 aChavan, Nayaku uhttps://library.ncl.res.in/content/thermotropic-liquid-crystalline-polyesters-derived-2-chloro-hydroquinone