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时间:2020-03-26
《PPSPEEK共混物的超临界CO2微孔发泡研究.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、16第43卷,第6期工程塑料应用VolA3,NiO.62015年6月ENIGINEERIN/GPLA~TICSAPPLICATIONJun.2015doi:lO.3969/j.Jssn.1001-3539.2015.06.004PPS/PEEK共混物的超临界CO2微孑L发泡研究马忠雷,张广成,杨全。李建通,范晓龙(西北工业大学理学院应用化学系,西安710072)摘要:以超临界CO,为物理发泡荆通过固态间歇发泡法制备了不同共混比例的聚苯硫醚/聚醚醚酮(PPS/PEEK)微孔材料。采用差示扫描量热法探讨了PPS/PEE
2、K共混物的热性能,通过扫描电子显微镜观察分析了共混组成和饱和压力对微孔材料泡孔结构与分布的影响规律,并对微孔材料的冲击强度、介电常数和动态力学性能进行了研究。结果表明,共混使PPS相和PEEK相的结晶度增大,共混物中的气体饱和浓度随着PEEK组分含量的增加而增大。与纯PPS和PEEK相比,共混物中形成致密的多级泡孔结构。饱和压力越大则微孔材料的泡孔密度越大,且泡孔尺寸越小。微孔发泡使PPS/PEEK共混物的冲击强度增大,介电常数和储能模量降低。关键词:PPS/PEEK共混物;共混组成;微孔发泡;微观结构;性能中图分
3、类号:TQ328.9文献标识码:A文章编号:1001.3539(2015)06.0016.06StudyonMicrocellularFoamingofPoly(phenylenesulfide)/Poly(etheretherketone)BlendsUsingSupercriticalCarbonDioxideMaZhonglei,ZhangGuangcheng,YangQuan,LiJiantong,FanXiaolong(DepartmentofAppliedChemistry,SchoolofScienc
4、e,NorthwestemPolyteehnicalUniversialy,Xi’an710072,China,/lAbstract:Microcellularfoamsfrompolyphenylenesulfide/poly(ether-ether-ketone~l('PPS/PEEK)blendswithvariousblendratiosusingthesolid-statebatchfoamingtechniquewithsupercriticalCO2asaphy,sica1.blowingagent.
5、Thethermalpropertieswerediscussedbyusingdiferentialscanningcalorimetry,andtheeffectsofblendcompositionandsaturationpressureonthecellularstructureanddistributionwereanalyzedwiththegraphsobservedbyscanningelectronicmicroscopy.Theimpactstrength,dielectricconstant
6、anddynamicmechanicalproperties"ofthemicrocellularfoamswerealsoinvestigated.TheresultsshowthatblendingincreasethecrystallinitiesofPPSandPEEKphases.ThegasconcentrationinthePPS/PEEKblendsincreaseswiththeimprovedPEEKcontenL.ComparedwithpurePPSandPEEK,thePPS/PEEKbl
7、endsexhibithierarchicalcellularstructures.Theceldensityincreasesandthecellsizedecreaseswiththeincreasingsaturationpressure.Microcellularfoamingimprovestheimpactstrength,anddecreasesthedielectricconstantandstoragemodulusofPPS/PEEKMends.Keywords:PPS/PEEKblends;b
8、lendcomposition;microcellularfoaming;microstructure;property聚合物微孔材料具有冲击强度高、疲劳寿命孔发泡具有重要的理论意义。长、比强度高、导热率和介电常数低等优异性能],笔者采用超临界CO:通过固态间歇发泡法制在航空航天、汽车工业、绝缘材料、微电子封装和软备PPS/PEEK共混物微孔材料,对PPS/
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