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时间:2020-03-26
《PA6-b-PPG嵌段共聚物的合成与表征.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第43卷,第4期工程塑料应用Vo1.43,No.411l/2叭5年4月ENGINEERINGPLASTICSAPPLICATION2015doi:lO.3969/j.issn.1001·3539.2015.04.004PA6.b.PPG嵌段共聚物的合成与表征伍威1,2I彭军,王文志,张海良,邓如生f1.株洲时代新材料科技股份有限公司,湖南株洲4120002.湖南省高分子湖南湘潭411105)摘要:以己内酰胺、己二酸、聚丙二醇(PPG)等为原料,采用高压反应釜进行熔融缩聚,合成了一系列热塑性弹性体尼龙6-b—PPG(PA6.b—P
2、PG)嵌段共聚物。通过傅立叶变换红外分析、核磁共振氢谱对其化学结构进行表征,通过差示扫描量热、热失重分析其热性能,通过差示扫描量热分析、广角X射线衍射及偏光显微镜分析其结晶性能,并测试了材料的力学性能。结果表明,聚合产物为PA6硬段与PPG软段的嵌段共聚物;制备的系列PA6一b-PPG嵌段共聚物熔点在209~225qC之间,起始热分解温度在380~397~(2之间。随着PPG含量的增加,PA6.b—PPG嵌段共聚物从y型结晶向a型结晶转变,密度、硬度、拉伸强度、弯曲强度逐渐降低,而断裂伸长率逐渐增加。可以通过调整软硬段的比例得到
3、不同力学性能的PA6.b,PPG嵌段共聚物,以满足不同条件下的需求。关键词:热塑性弹性体;尼龙6;聚丙二醇;合成中图分类号:TQ334文献标识码:A文章编号:1001.3539(2015)04—0017.05SynthesisandCharacterizationOfPA6.b.PPGBlockCopolymersWuWlei,PengJun,WangWenzhi,ZhangHailiang,DengRusheng(1.ZhuzhouTimeNewMaterialTechnologyCo.,Ltd.,Zhuzhou412000,
4、China;2.KeyLaboratoryofPolymericMaterialsandApplicationTechnologyofHunanProvince,CollegeofChemistry,XiangtanUniversity,Xiangtan411105,China)Abstract:Takingcaprolactam,adipicacid,polypropyleneglycol(PPG)andetc.asrawmaterials,aseriesofthermoplasticelastomersPA6一b—PPGbl
5、ockcopolymersweresynthesizedbymeltpolycondensationintheautoclave.ChemicalstructureofPA6·b—PPGblockcopolymerwascharacterizedbyFTIRandH—NMR,thermalpropertiesweremeasuredbyDSCandTG,crystallizationbehaviorswereanalysedbyDSC,WAXDandPLM,mechanicalpropertieswerealsotested.T
6、heresultsshowthatblockcopolymerizationbetweenPA6hardsegmentandPPGsoftsegmentoccurs.Meltingpointsoftheblockcopolymersvaryfrom209oCto225oCandinitialthermaldecompositiontemperaturesvaryfrom378℃to397oC.Thecrystallinetypeoftheblockcopolymerstransformfrom-modificationtod·m
7、odificationwiththecontentofPPGincreasing.Thedensity,shorehardness,tensilestrengthandflexuralstrengthoftheblockcopolymersdecreaseandelongationatbreakincreaseswiththecontentofpPGincreasing.Theblockcopolymerswithdiferentmechanicalpropertiescanbegainedthroughadjustingthe
8、ratioofsoftsegmentandhardsegmentinordertomeettherequirementsindiferentconditions.Keywords:polyamidethermoplasticelastomer;nylon6;po
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