(PP/POE)-g-Ma改性剂对PC力学性能和加工性能的影响

用本实验室自制的（PP／POE）－g-MA共混物作为聚碳酸酯（PC）的改性剂，研究了改性剂含量对PC共混物的力学和加工性能的影响。结果表明，加入5％的PP／POE－g-Ma可明显提高PC的缺口冲击强度和改善PC的加工性能。     

聚丙烯的增韧改性

研究了POE ,EPDM ,EVA和EAA4种改性剂对PP性能的影响。结果表明 ,POE和EPDM对PP冲击强度提高较大 ,且POE对PP弯曲和拉伸强度降低较小 ,PP/POE的热性能和加工性能都较PP/EPDM共混材料优良     

PBt-TPE、EPDM、POE等弹性体改性PP性能的研究

研究了自制的聚1-丁烯热塑性弹性体(PBt-TPE)及市售的三元乙丙橡胶(EPDM)和乙烯-辛烯共聚物(POE)3种弹性体改性聚丙烯(PP)共混物的性能,比较了3种改性体(PBr-TPE、EPDM、POE)对PP共混物力学性能和热性能的影响,结果表明3种弹性体对PP具有相似的改性效果,共混物的断裂伸长率和冲击强度等韧性指标均有明显改善;PBt-TPE在某些方面可替代EPDM作为PP的改性剂,其工业化产品将具有明显的价格优势.     

马来酸酐接枝乙烯-辛烯共聚物对聚对苯二甲酸丁二醇酯的增韧作用

研究了马来酸酐接枝乙烯-辛烯共聚物(POE—g—MAH)和POE—g—MAH／聚丙烯(PP)共混物对聚对苯二甲酸丁二醇酯(PBT)的增韧作用。结果表明,POE—g—MAH／PP共混物对PBT的增韧效果优于POE—g—MAH的,POE—g—MAH和PP并用具有显著的协同增韧作用。扫描电镜照片表明,POE—g-MAH／PP共混物增韧PBT具有软壳-硬核结构。     

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。     

PP/POE及PP/EPDM共混改性研究

以茂金属聚烯烃弹性体(POE,乙烯-辛烯共聚物)和三元乙丙橡胶(EPDM)作为聚丙烯(PP)的增韧剂,研究了PP/POE及PP/EPDM共混物的加工性能及力学性能。研究结果表明,POE在加工性、增韧改性等方面比EPDM更具有优势。借助扫描电子显微镜(SEM)进一步探讨了共混物的形态结构与性能的关系。     

POE与EPDM对聚丙烯增韧改性研究

以茂金属聚烯烃弹性体(POE,乙烯-辛烯共聚物)和传统三元乙丙胶(EPDM)作为聚丙烯(PP)的增韧剂,比较研究了PP/POE及PP/EPDM共混物的加工性能及力学性能。研究结果表明,POE在加工性、增韧改性等方面比EPDM更具有优势。扫描电子显微镜(SEM)进一步探讨了共混物的形态结构与性能的关系。     

PP/弹性体/纳米CaCO3三元复合材料研究

以聚烯烃弹性体POE(乙烯辛烯共聚物)为增韧剂，以纳米CaCO3为增强剂，利用双螺杆挤出机，通过熔融共混工艺制备了聚丙烯(PP)／POE／无机纳米粒子复合材料。测试了复合材料的力学性能并利用扫描电子显微镜(SEM)对三元复合材料的断面形态进行了研究。研究结果表明，利用纳米CaCO3对共混物PP／POE进行改性，存在一个最佳用量，一般为5％左右。采取将纳米CaCO3先与POE混合挤出后再与PP进行共混挤出的二步法工艺，复合体系的综合性能较优。     

聚碳酸酯树脂的改性研究

以聚碳酸酯(PC)为基体,分别用聚丙烯(PP)、聚丙烯接枝马来酸酐(PP-g-MAH)及三元乙丙橡胶接枝甲基丙烯酸缩水甘油酯(EPDM-g-GMA)作为改性剂分别对PC进行改性。用双螺杆挤出机制备不同配比的PC/PP共混物,探究了不同含量PP改性PC后的力学及加工性能。结果表明,加入2份的PP既可明显提高PC的加工性能又能保留PC的透明性;利用扫描电镜观察质量比98∶2的PC/PP及PC/EPDM-g-GMA合金的断面剥离形貌,发现PC/EPDM-g-GMA界面结合力有较大增强,且共混体系的力学性能也有明显改善。     

PP/POE共混物力学性能研究

用双螺杆挤出机制备了聚丙(烯PP)/聚烯烃弹性(体POE)共混物,研究了POE用量对PP/POE共混物冲击性能、拉伸性能及弯曲性能的影响。结果表明:随着POE含量的增加,PP/POE共混物的冲击强度明显提高;拉伸强度及拉伸模量弯、曲强度及弯曲模量、断裂伸长率及断裂强度均减小。     

(PE/POE)-g-MAH增韧尼龙6的研究

马来酸酐接枝PE／POE(POE为乙烯—辛烯共聚物)对尼龙6(PA6)有显著的增韧效果。对马来酸酐接枝PE／POE的产物进行了红外光谱表征，证实了马来酸酐在PE／POE主链上的接枝。同时研究了(PE／POE)—g—MAH增韧PA6的形态、机械性能及简要的增韧机理。结果表明，PA6与(PE／POE)—g—MAH有很好的相容性，共混体系的缺口冲击强度比纯尼龙6有明显提高，当(PE／POE)—g—MAH用量达到30％时，可获得超韧尼龙。但同时，随着(PE／POE)—g—MAH用量的增加。共混体系的拉伸和扭曲强度有一定程度的下降，其中扭曲强度下降较为明显。     

炭黑对动态硫化POE/PP热塑性弹性体性能的影响

采用动态硫化法制备POE/PP共混物,研究了过氧化二异丙苯（DCP）对POE/PP体系熔体流动速率（MFR）和力学性能的影响。交联助剂硫磺（S）的加入有效地提高了交联效果,当m（DCP）/m（S）=2/0.2时,体系的综合力学性能最佳。通过不同加工工艺制备POE/PP/炭黑共混物,并研究了炭黑用量对体系力学性能和老化性能的影响。结果表明,母料法制备的共混物更有利于炭黑的分散,体系性能更好,炭黑的加入使体系的耐热老化性和抗紫外性能明显改善。     

Crystallization behavior and mechanical properties of polypropylene random copolymer/poly(ethylene‐octene) blends

New polymer blends of polypropylene random copolymer (PP‐R) and poly(ethylene‐octene) (POE) were prepared by melt‐blending process using a corotating twin‐screw extruder. The POE content was varied up to 35%. The toughening efficiency of POE for PP‐R was evaluated by the mechanical properties of the resulted PP‐R/POE blends. The crystallization behavior and morphology of the blends were also studied. Results show that POE acts as nucleation agent to induce the crystallization of PP‐R matrix at higher crystallization temperature. Super‐toughened PP‐R/POE blends (Izod impact strength more than 500 J/m) can be readily achieved with only 10 wt % of POE. The high toughness of PP‐R/POE is attributed to cavitation and shear yielding of matrix PP‐R, as revealed by the morphology studies. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011     

PP/POE/WGRT热塑性弹性体的制备及性能研究

采用动态硫化法制备了PP/POE/WGRT共混型热塑性弹性体（TPE）,考察了PP/WGRT共混比、在PP相中填充POE以及动态硫化法对TPE力学性能的影响。结果表明,改变PP/WGRT共混比以及在PP相中填充POE均不能获得TPE;采用动态硫化法制备的PP/POE/WGRT TPE具有较好力学性能,且当DCP用量为3份时TPE力学性能最佳。FE-SEM观察结果表明,动态硫化法使得PP/POE/WGRT TPE的界面作用获得增强,力学性能获得改善。     

Polymer blends based on polyolefin elastomer and polypropylene

A new family of homogeneous polyolefin polymers that exhibit unique molecular and rheological properties designated polyolefin elastomers (POEs) are characterized by a narrow molecular weight and high degrees of comonomer distribution. Because these copolymers are often elastomeric in nature, one of the uses for these materials is as impact properties improver for brittle polymers such as polypropylene at low temperatures. In this work a study was carried out about the effectiveness of the polyethylene elastomer (POE) as an impact modifier for polypropylene in relation to the traditional modifier EPDM. In this study the flow properties of of the POE/PP and EPDM/PP blends were also evaluated. The blends were analyzed by solid-state ¹³C nuclear magnetic resonance (¹³C-NMR) spectroscopy, scanning electron microscopy (SEM), and differential scanning calorimetry (DSC). The results showed that PEE/PP and EPDM/PP blends present a similar crystalline behavior, which resulted in a similar mechanical performance of the blends, on the composition analyzed. It was also verified that the POE/PP blend presents lower torque values than the EPDM/PP blend, which indicates a better processability when POE is used as an impact modifier. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 66: 2005–2014, 1997     

Effect of SEPS as a novel compatibilizer on the properties and morphology of PP/PC/POE blends

A novel macromolecular compatibilizer, styrene-ethylene-propylene-styrene (SEPS) with high content of styrene, was investigated for the purpose of improving the compatibility of PP (polypropylene)/PC (polycarbonate)/POE (ethylene-octene copolymer) blends. SEPS shows a remarkable compatibilizing effect since it has a particular structure with the EP-compatible aliphatic segments, which is well miscible with the nonpolar PP and olefinic elastomer POE domains, and S-chain segments which exhibit strong affinity with PC because of the similar molecular structure. Its compatibilizing effect was examined in terms of the mechanical, morphological, and thermal properties. The compatibilized PP-based blends represent remarkable improvement in impact strength and balanced tensile strength. When 5 wt % SEPS was added to PP/PC/POE blends (20 wt % POE), the impact strength of the blends was enhanced from 24 to 43 kJ/m² without obvious drop in the tensile strength. Their morphologies show a decreasing and much more homogeneous size of dispersed PC and POE particles through addition of SEPS, and the fracture surface morphologies change from irregular mosaic to the mix of mosaic and striation, and finally the regularly distant striation. The special morphology structure that resulted from the effect of the compatibilizer could be a key for enhancement of toughness and balanced rigidity of the blends. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

PP/POE共混物的形态和性能的研究

采用聚烯烃弹性体(POE)对聚丙烯(PP)进行增韧改性，研究了共混物的力学性能、热性能、断裂功和微观形态。结果表明：POE在PP基体中分散均匀，与基体树脂结合良好；随POE用量的增加，弹性体粒子尺寸不变仅数量增多；POE不仅可以提高材料的冲击韧性也可提高其断裂韧性；POE的加入使材料的软化点略有下降，对加工性能的影响较小。     

新型热塑性弹性体增韧聚丙烯的研究

以聚烯烃弹性体(POE,乙烯-辛烯共聚物)为PP的增韧性剂,利用转矩流变仪、差示量热扫描(DSC)及力学性能测试方法,比较研究了PP/POE及PP/EPDM共混物的加工性能、结晶性能及力学性能;结果表明,POE在加工性、改性效果等方面比EPDM更具优势。还探讨了POE用量对PP/CaCO     

Influence of composition and phase morphology on rheological properties of polypropylene/poly(ethylene‐co‐octene) blends

In this article, the phase morphology and rheological properties of polypropylene (PP)/poly(ethylene‐co‐octene) (POE) blends with a droplet‐matrix microstructure were studied by scanning electron microscopy and rheological experiments. The data were analyzed to yield the variations of rheological behavior with blend composition and insight into the microstructure of PP/POE blends. The Palierne's emulsion type model was used to extract information on rheological properties, and the interfacial tensions between the PP and POE were determined by fitting the experimental data with this model. The results indicated that the interfacial tensions were shown to depend on blend composition and temperature. Rheological properties of PP/POE blends were investigated in a systemic way with varying shear histories. The results showed that shear history had an important effect on the rheological properties of the blends due to the dispersed phase (POE) domains refined with increasing preshear rate and preshear time. POLYM. COMPOS., 2010. © 2009 Society of Plastics Engineers