小本体聚丙烯的改性研究

以小本体聚丙烯为基料，选择滑石粉为填料进行填充，同时选用三元乙丙橡胶进行增韧，研究了该填充增韧体系的组成和性能，实验证明：小本体聚丙烯经过适当的改性，可以制成综合性能较好的改性聚丙烯料，为小本体聚丙烯的改性及应用提供依据。     

聚丙烯增韧改性研究

主要研究了聚烯烃热塑性弹性体（POE）在聚丙烯改性中的应用，并与三元乙丙橡胶、二元乙丙橡胶弹性体进行对比，探讨了POE含量对聚丙烯的力学性能的影响。结果表明，POE改性聚丙烯时，质量分数15％的加入量就能起到明显的增韧效果；POE对聚丙烯缺口冲击强度提高较大，而弯曲模量及拉伸强度降低较小。     

聚丙烯共混改性研究进展

介绍了聚丙烯共混改性方法,重点阐述了弹性体三元乙丙橡胶EPDM、乙烯-辛烯共聚物POE对聚丙烯的增韧改性,分析了聚丙烯共混改性影响因素,并对聚丙烯共混改性今后的发展提出了建议。     

液体乙丙橡胶改性PP/CaCO3体系的研究

采用液体乙丙橡胶对PP／CaCO3体系进行增韧改性。结果表明，液体乙丙橡胶在聚丙烯(VV)中具有增塑、增韧作用，便于操作、极易分散，适用于无机物填充PP材料的增韧、增塑。     

我国聚丙烯增韧改性研究进展

综述了目前广泛采用的聚丙烯增韧改性方法，包括共聚，接枝，交联，茂金属作聚合催化剂与共混改性，无机刚性粒子改性，成核改性等。介绍了几种增韧方法的增韧机理，并比较各方法优缺点。提出茂金属聚丙烯，纳米无机粒子增韧和β晶型成核剂改性是今后聚丙烯增韧改性的发展重点。     

聚丙烯增韧改性研究现状

本文详细叙述了聚丙烯增韧改性的研究状况，论述了聚丙烯增韧改性机理。     

汽车用三元乙丙橡胶改性聚丙烯

探讨了三元乙丙橡胶（EPDM）增韧聚丙烯的机理,讨论了影响三元乙丙橡胶/聚丙烯共混物韧性、刚性、流变性能、形态结构的因素及它们之间的相互关系,有助于设计和制造应用于汽车上的该种改性材料。     

乙丙橡胶接技马来酸酐改性聚丙烯增韧母料及其制法

本发明是一种乙丙橡胶接技马来酸酐改性聚丙烯增韧母料,其特征在于,它是由以下重量配比的原料制成,聚丙烯80—120;抗氧剂0．5-1．5;乙丙橡胶接技马来酸酐15—25。     

橡胶/弹性体增韧改性聚丙烯研究进展

介绍了聚丙烯(PP)增韧改性机理,重点综述了当前研究较多的橡胶/弹性体对PP的增韧改性方法及未来PP增韧改性的主要研究方向。     

PP增韧技术的研究进展

从共聚改性、共混改性、添加成核剂等方面综述了近年来聚丙烯增韧的研究进展，介绍了增韧机理方面的最新研究成果。     

PP/共聚PP/POE汽车保险杠专用料的研制

研制了PP／共聚PP／聚烯烃弹性体(POE)汽车保险杠专用料，介绍了POE的结构特点，探讨了POE及共聚PP含量对PP力学等性能的影响。结果表明，POE对PP的增韧优于(乙烯/丙烯／二烯)共聚物(EPDM)，共聚PP在PP／共聚PP／POE体系中也起到增韧作用，该共混料可以满足汽车保险杠性能的要求。     

Improvement in impact property of continuous glass mat reinforced polypropylene composites

The toughened polypropylene (PP) was obtained by the blending of PP with ethylene‐propylene diene monomer (EPDM). The impact property of continuous glass mat‐reinforced polypropylene was adjusted through three ways: different toughness PPs and their blends were used as matrices, the functionalized polypropylene was added into the matrix to control the interfacial adhesion; the ductile interlayer was introduced at the fiber/matrix interphase by the grafting and crosslinking of rubber chains on fiber surface. The effect of PP toughness, interfacial adhesion, and ductile interlayer on the mechanical properties of composite systems was studied. The impact toughness of GMT increased with increasing the matrix toughness, whereas the flexural strength and modulus decreased. The good interfacial adhesion resulted in the low impact toughness. However, GMT composite with high strength, modulus, and impact toughness could be obtained by the introduction of a ductile interlayer at fiber/matrix interphase. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 83: 2680–2688, 2002     

剪切作用对PP/EPDM共混物性能的影响

研究了聚丙烯/(乙烯/丙烯/二烯)共聚物(PP/EPDM)共混物动态硫化过程中,剪切作用对其力学性能的影响。通过改变密炼机转子转速,得到了一系列PP/EPDM共混物,采用扫描电子显微镜、小角激光散射技术对试样进行微观分析。结果表明,不同转子转速对应于不同形态结构;剪切作用有一最佳值,对应于EPDM增韧.PP的效果最佳;剪切作用对其拉伸强度影响不大。     

Influence of the compounding route on the properties of polypropylene/nano‐CaCO3/ethylene–propylene–diene terpolymer tercomponent composites

The influence of the compounding route of polypropylene (PP)/ethylene–propylene–diene terpolymer (EPDM)/nano‐CaCO₃ composites on their properties, including their mechanical properties, the dispersion degree of nano‐CaCO₃, and the morphology of EPDM, was studied. The results showed that the toughness of the composites and the morphology of the EPDM particles were markedly influenced by the compounding route, whereas the dispersion degree of nano‐CaCO₃ in the matrix was little influenced by the compounding route. The impact strength of composites prepared by one route was about 60 kJ/m² with 20 wt % nano‐CaCO₃. The results indicated that a sandbag of nano‐CaCO₃ embedded in EPDM could effectively improve the toughness of the composites. A sandbag composed of EPDM and nano‐CaCO₃ eliminated the deterioration effect of the nano‐CaCO₃ agglomerate on the toughness of the composites, whereas the nano‐CaCO₃ agglomerate separately dispersed in PP decreased the toughness of the tercomponent composite © 2005 Wiley Periodicals, Inc. J Appl Polym Sci, 2006     

Study of nucleation activity and application of a nucleating agent to copolypropylene

The influences of nucleating agent content on crystallization peak temperature, crystallization curve shape, crystallization onset temperature, and crystallinity of a copolypropylene were studied in detail by differential scanning calorimetry. The results showed that crystallization onset temperature and crystallization peak temperature increased 17°C–22°C and 15°C–19°C, respectively, with increasing nucleating agent content. The behavior of the nucleating agent showed excellent efficiency. But the shape of the crystallization curve broadened with increasing nucleating agent content, and the crystallinity came to an extremum when the nucleating agent content was 0.2%. These results generally differed from those for crystallization of i‐PP by a nucleating agent. Modification of copolypropylene was studied by use of a nucleating agent, and the characteristics of the effects of the nucleating agent on copolypropylene were mastered. The results showed that the hardness of a copolypropylene improved observably. So the abrasion resistance of biaxially oriented polypropylene (BOPP) film for cigarette packaging was improved by adopting the modified copolypropylene as the skin‐layer heat‐seal material of BOPP film. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101:3915–3919, 2006     

Effect of ultrasound on extrusion of PP/EPDM blends: Structure and mechanical properties

The effects of ultrasonic irradiation on the mechanical properties, morphology, and crystal structure of polypropylene (PP)/ethylene‐propylene‐diene terpolymer (EPDM) blends were examined. Results show that appropriate irradiation intensity can noticeably increase the toughness of the PP/EPDM blends without reducing rigidity. Scanning electron microscopic (SEM) observation shows that with ultrasonic irradiation, the morphology of a well‐dispersed EPDM phase is formed in the PP/EPDM blend. The glass transition temperatures of PP and EPDM phase approach each other as a result of ultrasonic irradiation. Differential Scanning Calorimetric (DSC) analysis indicates that the crystallinities of the PP and EPDM phases increase with ultrasonic irradiation, and β crystals of PP form in the PP/EPDM blend with ultrasonic irradiation, which is proven by wide angle X‐ray diffraction (WAXD) analysis. Polym. Eng. Sci. 44:1509–1513, 2004. © 2004 Society of Plastics Engineers.     

Effect of ultrasound on extrusion of polypropylene/ethylene–propylene–diene terpolymer blend: Processing and mechanical properties

The effects of ultrasonic irradiation on extrusion processing and mechanical properties of polypropylene (PP)/ethylene–propylene–diene terpolymer (EPDM) blends are examined. Results show that appropriate irradiation intensity can prominently decrease die pressure and apparent viscosity of the melt, increase output, as well as increase toughness of PP/EPDM blends without harming rigidity. In case the blends are extruded with ultrasonic irradiation twice, the impact strength of the blend rises sharply at 50–100 W ultrasonic intensity, and amounts to more than 900 J/m, 1.5 times as high as that of blend without ultrasonic irradiation. Scanning electron microscopy observation shows that with ultrasonic irradiation, morphology of uniform dispersed EPDM phase and good adhesion between EPDM and PP matrix was formed in PP/EPDM blend. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3519–3525, 2003     

增韧增强阻燃聚丙烯的研制

采用溴／锑复合阻燃剂、三元乙丙橡胶(EPDM)和无碱玻璃纤维对聚丙烯(PP)进行了复合改性研究，考察了复合阻燃剂、EPDM和无碱玻璃纤维含量对PP性能的影响。研究结果表明，溴／锑复合阻燃剂对PP有良好的阻燃作用；EPDM对PP有很好的增韧作用，并且可以提高阻燃剂的阻燃效率；无碱玻璃纤维的加入在有效提高复合材料拉伸强度、弯曲强度及弯曲模量的同时，还可以提高其冲击强度。     

高抗冲聚丙烯极性材料的研究

以共聚ＰＰ、均聚ＰＰ按一定配比为基料,ＥＰＤＭ－ＨＤＰＥ复合粒子为增韧剂、加入用多组分熔融接枝的ＧＰＰ,采用共混改性技术研制出适合于制作轿车可涂装性外装件的高抗冲聚丙烯极性材料,并就其组成,用量,组分间熔融粘度差以及组分间相容性对性能的影响作了初步探讨。