高粘度PET/PPS共混物的力学及流变性能研究

通过在高粘度聚酯(PET)中加入聚苯硫醚(PPS),经熔融共混挤出制备PET/PPS共混物,研究了PPS对PET力学性能和流变性能的影响。结果表明,适量PPS可提高PET的拉伸强度和弯曲强度,而缺口冲击强度略有下降;共混物的流变行为符合假塑性流体的流动规律,随着PPS含量的增加,共混物的非牛顿指数先增大后减小;共混物的粘流活化能随着PPS含量的增加而降低。当PPS质量分数为5%时,共混物的综合性能最佳,且具有良好的成型加工性能。     

PPEK/PPS共混物流变性能的研究

通过熔融挤出的方法制备了含不同比例的二氮杂萘酮结构的聚芳醚酮（PPEK）和聚苯硫醚（PPS）共混物，并用毛这流变仪研究了该共混物的流变性能。在所研究的温度和剪切速率范围内，当PPS窗户低时，PPEK／PPS共混物溶体为典型的假塑性流体，而当PPS含量为60％时，共混物则近似为牛顿流体。PPS的混入极大地降低了PPEK的熔体粘度，而且在一定范围内，随PPS含量的增加，可有效地改善挤出物外观。同时考察了剪切速率，实验温度等对共混物流变性能的影响。     

PBS/PBAT共混型全生物降解材料的制备及其性能研究

通过熔融共混法制备了聚丁二酸丁二醇酯（PBS）/聚己二酸对苯二甲酸丁二酯（PBAT）共混物,用熔体流动速率法、扫描量热法、X射线衍射、扫描电镜法及力学性能测试等手段研究了PBS/PBAT共混物的熔体流动性、结晶性能、力学性能以及共混物相容性。结果表明,随着PBAT含量的增加,PBS/PBAT共混体系的拉伸强度先升高后降低,断裂伸长率不断提高,冲击强度先降低后提高;当PBAT含量为20 %（质量分数,下同）时,与纯PBS相比,断裂伸长率提高10倍,冲击强度提高82 %,而拉伸强度仅仅降低6 %。     

PPEKK／PPS共混物流变性能的研究

采用溶液共沉降的方式制备了不同比例的含二氧杂萘酮结构聚醚酮酮（PPEKK）和聚苯硫醚（PPS）共混物。用毛细管流变仪测定了PPEKK/PPS共混莪的流变性能。结果发现在所研究的温度和剪切速率范围内,PPEKK/PPS共混物熔体为假塑性流体,其熔体表现粘度随PPS含量的增加,温度的升高,剪切速率的增大而下降,熔融活化能随剪切速率的增大而降低。对挤出样条的胀大比率、外观形貌研究表明,PPS的加入不仅有利于改善PPEKK的熔融加工性,还能改善成品尺寸稳定性和外观。     

吸附剂及萃取剂对ABS共混物性能的影响

采用熔融共混法制备ABS共混物,利用力学性能测试和热脱附-气相/质谱(TDS-GC/MS)分析手段考察了吸附剂、萃取剂以及真空度对ABS共混物力学性能、熔体流动速率、气味和挥发性有机物(VOC)挥发量的影响。实验结果表明,随着吸附剂、萃取剂和真空度的增加,ABS共混物的气味和总挥发性有机物(TVOC)降低;而吸附剂和萃取剂含量对力学性能几乎没有影响,对熔体流动速率略有影响;另外,随着吸附剂含量的增加,ABS共混物的吸湿性逐渐增大。当吸附剂质量分数达到5%时,放置360 h后,其吸水量提高1倍;在ABS共混物中,当吸附剂和萃取剂质量分数分别为1.0%、1.5%时,共混物的气味强度和舒适度可分别达到3.0级和0级,TVOC的挥发量比挤出后的纯ABS下降了55%。     

EVA熔体流动速率对PLA/EVA共混物性能的影响

通过熔融共混法制备了聚乳酸（PLA）/乙烯-乙酸乙烯酯共聚物（EVA）共混物,采用SEM、DSC、旋转流变仪等研究了VA质量分数为28%,熔体流动速率（MFR）不同的EVA对PLA/EVA共混物性能的影响。结果表明,EVA熔体流动速率越小,其在PLA基体中分散越均匀,EVA颗粒粒径也越小。共混物的结晶度随EVA熔体流动速率的增大而增大,但PLA的玻璃化转变温度（Tg）基本不受EVA的影响。PLA/EVA共混物的复数黏度和储能模量均随EVA的熔体流动速率的增高而减小。力学性能测试结果表明,当EVA的质量分数为15%时,PLA的断裂伸长率明显升高,冲击强度约是纯PLA的2倍。     

低气味、低VOC聚丙烯/滑石粉共混物的研究

采用熔融共混法制备聚丙烯(PP)/滑石粉共混物,利用力学性能测试和热脱附-气相/质谱(TDS-GC/MS)分析手段考察了滑石粉、吸附剂和萃取剂对PP/滑石粉共混物力学性能、熔体流动速率、气味和挥发性有机物(VOC)挥发量的影响。实验结果表明,随着滑石粉、吸附剂和萃取剂含量的增加,PP/滑石粉共混物的气味和总挥发性有机物(TVOC)降低;而吸附剂和萃取剂含量对力学性能几乎没有影响,对熔体流动速率略有影响;另外,随着吸附剂含量的增加,PP/滑石粉共混物的吸湿性会增大,当吸附剂质量分数达到5%时,放置480 h后,其吸水量提高2.7倍;在滑石粉质量分数为20%的PP/滑石粉共混物中,当吸附剂和萃取剂质量分数分别为0.5%,1.0%时,共混物的气味强度和舒适度可分别达到2.5级和0级,TVOC挥发量较挤出后的纯PP下降51%。     

LDPE/POE共混物的结晶行为和力学性能

采用熔融共混法制备了低密度聚乙烯（LDPE）／聚烯烃弹性体（POE）共混物,通过差示扫描量热法和广角X射线衍射表征了共？昆物的结晶行为及LDPE、POE结晶的相互影响,研究了共混物的力学性能。随着POE用量的增加,LDPE的结品度稍有减小,结晶的完善性和均一性变差,晶粒尺寸逐渐变小;LDPE在结晶过程中出现了二次结晶;共混物的硬度、定伸应力和熔体流动速率均逐渐减小,拉伸断裂应变则逐渐增加。当w（POE）为30％时,材料的拉伸强度达到最大值,为21.5MPa。随着LDPE含量的增加,POE的结晶度逐渐减小。     

增塑剂对PHBV/PBS共混物性能的影响

分别以柠檬酸三乙酯(TEC)、聚乙二醇(PEG)作为聚β-羟基丁酸/戊酸酯(PHBV)和聚丁二酸丁二酯(PBS)共混时的增塑剂,通过熔融加工制得PHBV/PBS共混物。利用熔体流动速率仪、差示扫描量热仪、X射线衍射仪)、万能材料试验仪、扫描电子显微镜等研究PHBV/PBS共混物的熔体流动速率、热性能、晶胞结构、力学性能、相形态等性能。结果表明,随着增塑剂添加量的增加,共混物性能发生显著变化。当PEG和TEC用量均为10份(质量份)时,共混物的熔体流动速率分别增大到纯共混物的约3倍和1.8倍;PEG和TEC均使共混物的拉伸断裂伸长率先增加后降低,其中PEG和TEC的含量分别为2.5份和10份时,共混物有最大断裂伸长率;共混物的结晶(Tc)和熔融温度(Tm),随着两种增塑剂量增加均略有下降。扫描电镜照片表明两种增塑剂对共混物中两相的分散起到促进作用。     

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％。     

E-MA-GMA增容剂对PPS/PA66共混体系性能的影响

研究了增容剂乙烯(E)-丙烯酸酯(MA)-甲基丙烯酸缩水甘油酯(GMA)共聚物(E-MA-GMA)对聚苯硫醚(PPS)/聚酰胺(PA)66共混体系的相容性、力学性能、热性能、流变性能的影响。结果表明,增容剂的加入,增加了共混体系的相容性,提高了共混物的力学性能;DSC结果表明,E-MA-GMA影响共混体系的结晶和熔融行为;流变性能测试结果表明,增容PPS/PA66共混体系是假塑性流体,E-MA-GMA用量增加,使共混体系的表观黏度增大。     

聚甲基乙烯基硅氧烷增韧聚苯硫醚的力学性能研究

通过熔融共混制备了聚苯硫醚/无苯基聚甲基乙烯基硅氧烷(PPS/NPMVS)共混物及聚苯硫醚/单苯基聚甲基乙烯基硅氧烷(PPS/SPMVS)共混物,并对该共混物体系的微观形貌及力学性能进行了分析表征。结果表明,弹性体在共混物中均匀分散,弹性体的加入对PPS基体起到明显的增韧效果;当弹性体的含量为3 %（质量分数,下同）时,2种共混材料的增韧性能最佳,PPS/NPMVS共混材料的断裂伸长率相对于PPS基体提高了3.9倍,PPS/SPMVS共混材料的断裂伸长率相对于PPS基体提高了2.4倍;当NPMVS含量为10 %时,PPS/NPMVS共混材料的冲击强度相对于PPS基体提高了1.8倍,当SPMVS含量为3 %时,PPS/SPMVS共混材料的冲击强度相对于PPS基体提高了1.4倍。     

Crystallization and melting behavior of poly(p‐phenylene sulfide) in blends with poly(ether sulfone)

Crystallization and melting behaviors of poly(p‐phenylene sulfide) (PPS) in blends with poly(ether sulfone) (PES) prepared by melt‐mixing were investigated by differential scanning calorimetry (DSC). The blends showed two glass transition temperatures corresponding to PPS‐ and PES‐rich phases, which increased with increasing PES content, indicating that PPS and PES have some compatibility. The cold crystallization temperature of the blended PPS was a little higher than that of pure PPS. Also, the heats of crystallization and melting of the blended PPS decreased with increasing PES content, indicating that the degree of crystallinity decreased with an increase of PES content. The isothermal crystallization studies revealed that the crystallization of PPS is accelerated by blending PPS with 10 wt % PES and further addition results in the retardation. The Avrami exponent n was about 4 independent on blend composition. The activation energy of crystallization increased by blending with PES. The equilibrium melting point decreased linearly with increasing PES content. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 74: 1686–1692, 1999     

聚醚醚酮/聚苯硫醚共混体系的相容性和力学性能研究

研究了聚醚醚酮(PEEK)/聚苯硫醚(PPS)共混体系的加工流变行为,共混体系在不同状态下的相容性,以及相容性与力学性能的内在关联。结果表明,PPS的加入显著改善了共混体系的流动性;该共混体系在熔融状态具有良好的相容性,但在固态条件下呈明显的相分离状态;共混体系的宏观力学性能受固态下的相分离控制,力学性能随PPS含量的增加而下降,其变化趋势与相分离呈负指数关系。     

A study on the ternary blends of polyphenylenesulfide,polysulfone, and liquid crystalline polyesteramide

Ternary blends of poly(p-phenylenesulfide) (PPS), thermotropic liquid crystalline polyesteramide (LCP), and polysulfone (PSF) were investigated in terms of processing characteristics, blend morphology, and physical properties. In the incompatible PPS/LCP blends, LCP imparted a nucleating effect to the crystallization of PPS. Up to 10wt% LCP content, the tensile properties of PPS/LCP blends were enhanced with increasing LCP content, but they deteriorated if the LCP content exceeded 20wt%. Addition of a third component, PSF, to the 90/10 PPS/LCP blend promoted development of rodlike or threadlike fibrillar structure and orientation of the deformed LCP domains, which led to improvement of tensile strength up to 20%.     

Study on Thermal Properties and Crystallization Behavior of Blends of Poly(phenylene sulfide)/Poly(ether imide)

The thermal behavior of poly(phenylene sulfide) (PPS) blends with poly(ether imide) (PEI) was studied by differential scanning calorimeter (DSC). The crystallization temperature of PPS in blends shifted from 216.8°C to 226.4°C upon addition of 20–70% PEI contents. The heat of crystallization remained unchanged with less than 50% PEI in blends, whereas the heat of fusion decreased with increasing PEI content. The isothermal crystallization indicated that incorporating PEI would accelerate the crystallization rate of PPS. The activation energy of crystallization increased with addition of PEI. The equilibrium melting point of PPS/PEI blends was not changed with compositions.     

Manipulating the phase morphology in PPS/PA66 blends using clay

By adding a small amount of clay into poly(p‐phenylene sulfide) (PPS)/polyamide 66 blends, the morphology was found to change gradually from sea–island into cocontinuity and lamellar supramolecular structure, as increasing of clay content. Clay was selectively located in the PA66 phase, and the exfoliated clay layers formed an edge‐contacted network. The change of morphology is not caused by the change of volume ratio and viscosity ratio but can be well explained by the dynamic interplay of phase separation between PPS and PA66 through preferential adsorption of PA66 onto the clay layers and through layer–layer repulsion. This provides a means of manipulating the phase morphology for the immiscible polymer blends. The mechanical and tribological properties of PPS/PA66 blends with different phase morphologies (different clay contents) were studied. Both tensile and impact strength of the blends were found obviously increased by the addition of clay. The antiwear property was greatly improved for the blends with cocontinuous phase form. Our work indicates that the phase‐separating behavior of polymer blends contained interacting clay can be exploited to create a rich diversity of new structures and useful nanocomposites. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007     

Poly(p-phenylene sulfide)/liquid crystalline polymer blends. II. Crystallization kinetics

The crystallization kinetics of blends made of poly(p-phenylene sulfide) (PPS) with a liquid crystalline polymer (LCP) was studied. The blends were found to be immiscible by dynamic mechanical thermal analysis (DMTA). Results of non-isothermal and isothermal crystallization experiments made by differential scanning calorimetry (DSC) showed that both components had their crystallization temperatures increased; also the LCP melting temperature was found to increase in the blends. It was concluded that the addition of LCP to the PPS increased the PPS overall crystallization rate due to heterogeneous nucleation. The fold interfacial free energy, σ_e of the PPS in the blends was observed not to vary with composition. © 1996 John Wiley & Sons, Inc.     

耐热树脂共混物的界面增容研究

研究了ＰＭＲ型聚酰亚胺（ＰＩ）增容聚芳醚酮（ＰＥＫ－Ｃ）／聚苯硫醚（ＰＰＳ）共混物的热学性能、力学性能及其形态结构,对ＰＭＲ型ＰＩ在ＰＥＫ－Ｃ／ＰＰＳ共混物中所起的增容作用机理进行了初步的探讨,实验发现,热固性聚合物预聚物可用于增容热塑性聚合物共混体系,这种增容方法有其特殊性和新颖性,增容后的ＰＥＫ－Ｃ／ＰＰＳ共混物的力学性能得以改善。