山梨醇類透明成核劑合成工藝的研究.pdf

1、大慶石油學(xué)院碩士學(xué)位論文山梨醇類透明成核劑合成工藝的研究姓名：張志秋申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：應(yīng)用化學(xué)指導(dǎo)教師：汪穎軍20070327AbstractPolypropylene(PP)hasbeenoneofthefivewidestappliedresinbecauseofitsexcellentperformanceButthefaultysheenandtransparencerestrictitsapplicationAtpres

2、entaddingclarifyingnucleatingagentisthesimplestmethodtomodifythetransparenceofPPThesorbitol—typednucleatingagentisthemostpopularathomeandabroadThesynthesisofthethirdgenerationsorbitoltypodnucleatingagent132，4di(3，4dimeth

3、y—benzylidene)sorbitol(DMDBS)ⅥmresearchedthoroughlyandtheeffectsofputtingthematerialsinteactorlaWmaterialsratio，andthecategoryandmassofcatalystetcontheyieldofDMDBSwerestudiedinthisthesisAccordingtothedataoftheconditional

4、experimenttheoptimalconditionofsynthesisis：undertheprotectionofN2，thematerialsa“putinteactorinonetime，theratioofaldehydetosorbitolis20：1o，paratoluanesolfonicacidisthecatalystthecatalyst，solventandacceleratingagentare15％，

5、627％and447％ofrawmaterialsbyweightrespectivelytemperatureiselevatedslowlyreactingtimeis6hoursThereactionisterminatedbyneutralizationtherawproductiswashedandcyclohexaneisrecycledbyevaporationTherawproductisrefinedwithaceto

6、neandtheaverageyieldofDMDBSis747％TherefinedDMDBSiswhiteandodorlessThecraftisrationalandrepetitionalThemeltingpointoftherefinedDMDBSisabout265“(2whichreachesthedemandofthistypenucleatingagentathomeandabroadThehazeofT30SPP

7、isminish翻from363％to176％whentheadditionofDMDBSis01％ofPPbyweight，ThenucleatingcapabilityofDMDBSisasthesanle∞Millad3988Thesynthesisof1324di(3。4benzylidene)xylitol(DMDBX)WasstudiedinthisthesisDMDBXjssimilartoDMDBS，andboththe

8、maretheproductofacetalizationTheeffectsofsolventsystem，rawmaterialratio，andthemassofcatalystandacceleratingagentontheyieldofDMDBXwerestudiedTheoptimalconditionis：inthesystemofcyclohexaneandmethanol，theratioofaldehydetoso

9、rbitolis24：10。thecatalystandacceleratingagentare40％wtand430％wtofrawmaterialsbyweightrespectivelyandtheotherconditionis∞thesameasthesynthesisconditionofDMDBSTheraWproductisrefinedwithacetoneandtheaverageyieldofDMDBXisupto

10、92，55％TbecraftisrationalandrepetitionalThemeltingpointoftherefinedDMDBXisabout240℃ThehazeofT30SPPis191％whentheadditionofDMDBXisO1％ofPPbyweightThisprovesthe900dnucleatingcapabilityofDMDBXandprovesthatthedihydricstructurei

11、snotthecrucialfactorofnucleatingcapabilityofsorbitoltypednucleatingagents，whichisjustoneofthefactorsthatacceleratethenucleatingfunctionBesidesthenucleatingcapabilityDMDBXalsohassomegoodeffectsontheimpactstrengthandtensil