MBS树脂增韧PC的研究

利用双螺杆挤出机制备甲基丙烯酸甲酯-丁二烯-苯乙烯（MBS）树脂与聚碳酸酯（PC）熔融共混物。通过SEM观察得出：随着MBS用量的增加，改善了MBS与PC的相容性；力学性能结果表明：MBS的加入，提高了PC／MBS合金的缺口冲击强度，但合金的拉伸强度降低；PC／MBS合金的断裂表明：MBS增韧PC的机理是基体的剪切屈服和粒子的空洞化。     

聚砜／聚苯硫醚共混物的动态黏弹行为及力学性能研究

研究了聚砜/聚苯硫醚（PSF／PPS）共混物的动态流变特征、共混物动态热力学行为及力学性能，并分析了相容性与力学性能的关系。结果表明，PPS的加入显著改善了共混物的流动性，共混物的黏度随PPS含量和温度的上升而下降，对剪切速率的变化不敏感；共混体系呈一定界面相互作用的两相体系，其相容性依赖于组成比例。当PSF/PPS为3／7（质量比，下同）时共混体系相容性最好，相应地表现出最好的综合力学性能，尤其是冲击强度比PPS提高了64％。     

PPS/PA66/GF复合材料的制备及性能研究

在聚苯硫醚（PPS）树脂基体中引入聚酰胺66（PA66）,随着PA66含量增加,PPS/PA66共混物的拉伸强度和弯曲强度逐渐下降,结合PPS/PA66共混物的相形貌分析,提出了通过玻璃纤维（GF）的引入,制备具有互锁结构的PPS/PA66/GF三元体系复合材料,达到同时提高复合材料的强度、刚度及韧性的目的。分别考察了短玻璃纤维（SGF）和中长玻璃纤维（LGF）增强PPS/PA66的综合性能。结果表明,GF的引入显著提高了共混物的力学性能,同时,PPS/PA66/SGF和PPS/PA66/LGF复合材料的扫描电子显微镜和动态力学性能分析都表明共混物内部形成了一个高度互锁的结构。     

聚烯烃弹性体增韧改性聚碳酸酯的研究

用四种聚烯烃弹性体对聚碳酸酯（PC）进行了增韧改性。探讨了不同种类和用量的增韧剂对聚合物共混物力学性能的影响。结果表明，EVA的加入使共混物韧性改善最明显，当其用量为15％时，材料的缺口冲击强度提高至38．7kJ／m^2，为纯PC的25倍，但材料的拉伸强度急剧下降。POE—g—MAH对PC的增韧效果仅次于EVA，但共混物的拉伸强度降低程度比EVA小，且共混物的断裂伸长率提高很多。其它两种共混体系PC／EAA、PC／LLDPE-g—MAH的性能介于EVA和POE—g—MAH之间。综合考虑材料的各种机械性能，添加20％的POE—g—MAH的PC共混物的性能较佳。     

乳化剂对合成MBS树脂和PVC/MBS合金力学性能的影响

通过调节乳化剂十二烷基苯磺酸钠（SDBS）的用量合成MBS树脂，并将其与聚氯乙烯（PVC）树脂进行共混，测试PVC／MBS合金的力学性能。测试结果表明：乳化剂的用量越多，MBS树脂相的相对分子质量越低，PVC／MBS合金的拉伸强度变化不明显，其冲击强度先增大后减小。     

聚苯硫醚／聚碳酸酯共混体系的形态及结晶行为

通过熔融共混的方法制备了聚苯硫醚（PPS）／聚碳酸酯（PC）共混体系。用扫描电镜、动态热力学分析以及动态流变测试等方法研究了共混体系内部形态结构。用差示扫描量热仪和X射线衍射法对材料的结晶行为进行了研究。结果表明，在部分相容PPS／PC共混体系中，从熔体冷却结晶时，无定形的PC组分无异相成核作用，反而抑制了PPS的结晶，且随PC含量增加阻碍作用增强；但PC组分的存在不改变PPS的结晶形态。     

ABS/PC聚合物合金的性能研究

研究了ABS和PC共混比对含有一定量相容剂的ABS／PC聚合物合金力学性能、耐热性、动态力学性能和断口形貌的影响。结果表明，PC的加入可以提高聚合物共混物的拉伸强度、弯曲强度、热变形温度和玻璃态转变温度；在PC为连续相的共混体系中，材料具有较好的综合性能。     

聚苯硫醚反应性共混体系的增韧研究

通过尼龙66（PA66）与环氧树脂、聚乙烯接枝马来酸酐（PE-g-MA）与环氧树脂类弹性体（E）的反应挤出，分别获得了具有微交联界面结构的PPS／PA66／环氧树脂共混体系和PPS／PE-g-MA／E共混体系，对共混物的损耗因数、力学性能及冲击断面形貌进行了研究。实验表明，因界面反应而产生的微交联结构提高了共混体系的相容性，可使体系的缺口冲击强度提高3倍；同时高活性的反应基团还可提供基体与纤维的界面黏结，使共混体系的强度得到提高，并使体系的耐热性得以保持。     

连续玻璃纤维增强热塑／热固性复合材料力学性能研究

采用热压成型方法制备连续玻璃纤维增强热塑／热固性复合材料（GF／EP／PC）,并与GF／PC复合材料进行力学性能测试比较和SEM照片观测分析了影响复合材料力学性能的因素。研究结果表明,GF／EP／PC复合材料的拉伸弹性模量与弯曲弹性模量分别为GF／PC复合材料的16．4倍和8．8倍,拉伸强度和弯曲强度分别提高了1．7倍和3．7倍;结合其力学破坏形貌照片,分析了纤维和树脂的粘接情况和材料的破坏模式以及PC树脂与芯层GF／EP复合材料的粘接情况。     

MPPO/talc复合材料制备及其性能研究

用偶联剂对滑石粉（talc）进行表面处理后，与改性聚苯醚（MPPOM115及NorylSE100）树脂进行共混改性，结果表明对拉伸强度有一定的增强作用，冲击性能有所降低，其它力学性能较均衡，保持了良好的电绝缘性，提高了MPPO的热变形温度（HDT）。在相同的流变性试验条件下，M115／tslc共混物的表观粘度（η_a）大于SE100／talc共混物的η_a，二者均具有可加工性，SE100／talc的加工性优于M115／talc。由扫描电镜观察到MPPO／talc共混物的结构形态，树脂与填料界面粘接良好，还表明talc粒径的细微化，能提高复合材料的强度和韧性。     

Hot water resistance of glass‐fiber and glass‐bead reinforced thermoplastics

The hot water resistance of three kinds of short glass fiber or glass bead‐reinforced plastics [polyphenyleneether (PPE), polyphenylenesulfide (PPS), and polyoxymethylene (POM)] was studied by hot water immersion testing, tensile testing and water‐hammer fatigue testing. It was found that the degradation of the strength was observed only for the reinforced plastics under hot water immersion and that the change of the tensile strength was most drastic in glass fiber‐reinforced PPS (GFPPS). Scanning electron microscope (SEM) observations of the tensile fracture surface revealed that the change in tensile strength was attributable to the deterioration of the interface between the glass fiber and the matrix resin. The results of acoustic emission analysis also supported the conclusion that the change in strength was due to the deterioration of the interface. Although the change in the tensile strength of glass fiber‐reinforced PPE (GFPPE) was small compared with that of GFPPS, debonding between the glass fiber and the matrix resin and surface cracks was observed on the surface of the GFPPE specimens.     

Thermal aging performance of glass fiber/polyphenylene sulfide composites in high temperature

In order to use the glass fiber reinforced polyphenylene sulfide composites (GF/PPS) in high temperature environments, thermal aging performance of two kinds of commercial grade PPS composites, reinforced by 40% glass fiber, PPS-G40 HM and 1140L4, in thermal aging temperature of 250°C was compared by tensile strength, oxidized layer, color, crystallization and melting behavior. The results showed that tensile strength of GF/PPS composites is significantly decreased with increasing of aging time below 200 h and the tensile strength of aged PPS-G40 HM is higher than that of aged 1140L4. The thickness of dark color area is increased with increasing of aging time. The thickness of oxidized layer of 1140L4 is thinner than that of PPS-G40 HM. However, the color of oxidized layer of PPS-G40 HM is lighter than that of 1140L4. The recrystallization in thermal aging results in the formation of crystal with higher melting point and increased melting temperature of GF/PPS composites. It is found that addition of epoxy resin can increase the initial mechanical property and improve the thermal aging performance of GF/PPS composites. A novel modified GF/PPS composite with higher thermal aging properties was obtained.     

后处理工艺对聚碳酸酯激光烧结件性能的影响

采用环氧树脂（EP）对聚碳酸酯（PC）烧结件进行后处理,研究了后处理工艺对PC烧结件力学性能的影响。结果表明,经EP处理后的PC烧结件由多孔性物质变为密实性物质,其拉伸强度及模量、冲击强度等性能均大幅度提高,其中,拉伸强度由0.39～2.29 MPa提高到约40 MPa,拉伸模量由2.19～17.13 MPa提高到约500 MPa,冲击强度从0.92～3.13 kJ/m2提高到约7 kJ/m2。     

Tensile fracture morphology of polysulfone-poly(phenylene sulfide) blends

Summary Melt-extruded and subsequently injection molded polysulfone (PSF) and poly(phenylene sulfide) (PPS) blends exhibit very good tensile properties, at least up to 30–50% by weight of PPS. The tensile strength at the lower PPS contents shows additive effect or slightly better and materials fail in ductile mode. Tensile fracture surfaces were investigated using scanning electron microscopy (SEM). The 20% PPS blend shows no apparent voids between phases with some pull-out or elongation of the dispersed phase. At 35% PPS, phase boundaries were not clear and very rough surface profiles were observed. Blends with high PPS content (>50%) usually fail in the brittle mode. The fracture morphology of systems failing with a brittle mode revealed an interfacial debonding phenomenon.     

Morphologies and tensile properties of elastomer-modified epoxy and polycarbonate blended systems

The morphologies and tensile properties of an elastomer-modified epoxy (EME)/polycarbonate (PC) binary system and an EME/diglycidyl ether of bisphenol A (DGEBA)/PC ternary system were examined. In the EME system, a continuous elastomer-rich phase formed, while in the EME/DGEBA systems (unblended with PC), a continuous epoxy-rich phase formed. In both of these systems, two-phase structures were observed. In contrast, a microdispersed structure was observed when the PC was blended with either the EME or with the EME/DGEBA systems. It is suggested that blending of the epoxy with PC caused an increased solubility of the former into the elastomer phase. The tensile strength and tensile elongation of both the EME and EME/DGEBA systems were improved by blending with PC. In the EME/PC blend, the tensile elongation reached its maximum value (60%) at a PC content of approximately 10 p.h.r. (parts per hundred resin by weight), with this maximum being approximately one and a half times higher than that of the unblended EME. Tensile strength was also clearly increased by blending with small amounts of PC, but soon reached a steady value. In the EME/DGEBA/PC blends, the tensile properties were dependent on the weight ratio of EME to DGEBA. In the absence of PC, as this ratio increased, the tensile elongation also increased, while at the same time the tensile strength decreased. The tensile properties were also improved in this system, by blending with PC. From the results obtained, it was clear that the improvement in tensile properties was closely related to the changes in morphology. Therefore, blending of the PC induced a microdispersed structure and improved the elongation of the epoxy resin.     

光盘回收PC改性ABS树脂研究

用光盘回收的聚碳酸酯（PC）树脂制备了丙烯腈-丁二烯-苯乙烯共聚物（ABS）/PC合金,探讨了回收PC含量、增容剂种类对合金力学性能的影响。结果表明,ABS/PC合金的拉伸强度随回收PC含量的增加而逐渐增大,冲击强度则呈先增长后下降的趋势,在回收PC含量为10 %（质量分数,下同）时达到最大值;增容剂甲基丙烯酸甲脂-丁二烯-苯乙烯共聚物（MBS）比甲基丙烯酸环氧丙酯接枝乙烯-辛烯共聚物（POE-g-GMA）更能改善ABS和PC的相容性,显著提高合金冲击强度,当回收PC含量为5 %时,用MBS增容的ABS/PC合金的冲击强度比纯ABS提高了42.8 %。     

高性能PC／ABS合金的研制

利用双螺杆挤出机制备PC／ABS合金,探讨了基材不同种类的选择及其比例的调整对PC／ABS合金性能的影响。结果表明：在PC／ABS合金（70／30）体系中,选用23．23％SAN粉料和5．89％高胶粉替代ABS粒料制成的合金缺口冲击强度可达95．04kJ／m^2,拉伸强度达58．28MPa,弯曲强度达73．8MPa。     

BMI/DBA/PC改性树脂体系的制备与性能研究

采用熔融预聚法制备N, N'-4, 4' -二苯甲烷双马来酰亚胺（BMI）/二烯丙基双酚A(DBA)/聚碳酸酯（PC） (BMI/DBA/PC) 改性树脂体系,研究了含有不同含量PC的改性树脂的力学性能、热稳定性及界面结构。结果表明,PC的加入能明显提高树脂的韧性和强度;当PC含量为8 %（质量分数,下同）时,相比BMI/DBA树脂浇铸体,BMI/DBA/PC树脂浇铸体的拉伸强度提高36.3 %,冲击强度提高109.1 %;改性树脂体系保持了优异的热稳定性和较高的热变形温度;改性树脂体系的相界面结构为PC相以微球状分散于BMI/DBA中,相界面较厚,界面作用较好。     

偶联剂对 PPS/PA66/T-ZnOw 复合材料力学性能的影响

采用硅烷偶联剂KH-560和钛酸酯偶联剂TM-38S对四针状氧化锌晶须(T-ZnOw)进行表面改性,制备了相应的聚苯硫醚(PPS)尼/龙(PA)66/T-ZnOw复合材料,研究了两种偶联剂及其复合体系对T-ZnOw表面改性效果和相应复合材料力学性能的影响,并利用扫描电子显微镜对复合材料的断面形态进行了观察。结果表明,钛酸酯偶联剂TM-38S对T-ZnOw的表面改性效果要优于硅烷偶联剂KH-560;两种偶联剂均提高了复合材料的拉伸强度、断裂伸长率和缺口冲击强度,但对复合材料的弯曲强度影响不大。其中TM-38S改性T-ZnOw与PPS/PA66复合后所得材料的力学性能优于KH-560改性T-ZnOw的材料。两种偶联剂的复合体系虽然可以弥补KH-560副反应对T-ZnOw表面改性的不利影响,但对改善复合材料力学性能的协同作用不明显。     

聚苯硫醚/钕铁硼复合材料力学与电磁性能

采用熔融共混的方法制备了聚苯硫醚( PPS) / 钕铁硼(NdxFe94?xB6) 复合材料,分析了复合材料的形态、力学性能及电磁性能。结果表明,均匀分散的NdxFe94?xB6粒子与PPS 基体界面结合紧密;与纯PPS 相比,NdxFe94?xB6添加量为50%时,复合体系的拉伸强度、弯曲强度和冲击强度分别提高了100%、44%和800%;但过多的NdxFe94?xB6填充量反而不利于材料力学性能的提升;复合材料的介电常数和磁导率都随含量增加而增大,在高含量下,介电常数虚部随频率明显变大。通过对复合材料反射衰减计算,匹配厚度d=2mm时,复合材料在高频段出现明显的吸收峰,特别是含量50 %时,吸收峰达到-18.3 dB,对应的频率为16.6 GHz。