LCP liquid crystalline polymers to LLDPE linear low density polyethylene

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1、LCPliquidcrystallinepolymersPARAMETERUNITVALUEREFERENCESGENERALCommonnameliquidcrystallinepolymersAcronymLCPCASnumber31072567(Xydar);144114034(VectraC)HISTORYPersontodiscoverGeorgeLuisLeClerc,ComtedeBuffon;FriedrichReinitzeDate17071788;1888DetailsfirstobservationbyLeClerc;Reinitzerdescribedp

2、ropertiesbasedonobservationsofcholesterolbenzoateSYNTHESISMonomer(s)structurethreegroupsofmonomersareinvolved:stiffunits(e.g,phenyl,Fink,JK,HighPerformancePolybiphenyl,ornaphthoicunits),linkingunits(e.g.,ether,ester,mers,WilliamAndrew,2008.amide,etc.),andflexiblespacerunits(e.g.,aliphaticorp

3、olyetherchains);thesemonomersareusedinXydar:terephthalicacid;benzoicacid;p,p’biphenolMonomer(s)CASnumber(s)100210;99967;92886Monomer(s)molecularweight(s)dalton,g/166.1308;138.1207;186.2066mol,amuMethodofsynthesisvariousroutescanbeusedtolinkthethreetypesofmonoFink,JK,HighPerformancePolymersi

4、nvolved,butpolycondensation(transesterification)tomers,WilliamAndrew,2008.formcopolyestersandpolyesteramidesisthemostfrequentlyusedNumberaveragemoleculardalton,g/10,60024,200weight,Mmol,amunMassaveragemolecularweight,dalton,g/12,00047,400Mmol,amuwPolydispersity,M/M1.82wnSTRUCTURECrystallinit

5、y%1838Kim,JY;Kim,SH,Antec,294246,2004.Crystallitesizenm13.5(spunfiber)Kim,JY;Kim,SH,Antec,294246,2004.COMMERCIALPOLYMERSSomemanufacturersAmericaQuantumLeapPackaging;Eastman;Kuraray;Solvay;Sumitomo;TiconaTradenamesLCPh;Titan,X7G;Vecstar;Xydar;Ekonol,Sumicasuper;Vectra,ZenitePHYSICALPROPERTIES

6、Densityat20oCgcm-31.341.4;1.51.81(1550%glassfiber)Bulkdensityat20oCgcm-30.6Birefringence0.030.07Kim,JY;Kim,SH,Antec,294246,2004.Meltingtemperature,DSCoC221370;280350(1550%glassfiber)DecompositiontemperatureoC350400Thermalexpansioncoefficient,oC-13.67.6E6;210E6(2045%glassfiber)Long,VK,Antec,1570

7、76,1998.23-80oC168HANDBOOKOFPOLYMERS/Copyrights2012;ChemTecPublishingLCPliquidcrystallinepolymersPARAMETERUNITVALUEREFERENCESThermalconductivity,meltWm-10.050.2K-1GlasstransitiontemperatureoC95136;164181(crosslinked)Hakemi,H,Polymer,41,614550,2000;Igbal,