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。     

乙烯-辛烯共聚物增韧透明聚丙烯的研究

用乙烯-辛烯共聚物（POE）对透明聚丙烯（PP）进行增韧改性,研究YPOE用量对PP／POE共混体系力学性能的影响。并研究了保持POE含量为10％不变时,加入LLDPE用量对于PP／POE／LLDPE共混体系力学性能的影响。用差示扫描量热法（DSC）研究了共混物的结晶形态,用扫描电子显微镜（SEM）分析了共混物的微观相态结构。结果表明,POE能大幅改善PP的常温和低温冲击韧性;LLDPE在PP／POE体系中明娃起到了协同增韧的作用,在LLDPE含量为5％时效果最好。     

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。     

纳米CaCO3和POE增韧废旧PP复合材料的研究

采用了纳米CaCO3和乙烯-辛烯共聚物（POE）对废旧聚丙烯（PP）进行增韧改性，借助于力学性能测试、SEM和偏光显微镜等观察手段对这一共混体系的增韧机理进行了研究。结果表明，纳米CaCO3和POE对废旧PP具有良好的增韧作用，两者有协同增韧效果；POE对废旧PP的增韧符合剪切屈服理论，纳米CaCO3的增韧机理是诱导PP产生大量的裂纹，形成空穴群，吸收冲击能；废旧PP／POE／纳米CaCO3复合材料的球晶尺寸细化，球晶边界模糊，非晶区域增大，材料的韧性明显提高。     

聚丙烯共混改性体系力学性能研究

首先分别采用乙烯-辛烯共聚物弹性体(POE)、有机改性的天然累托石粘土(OREC)与经过表面处理的两种晶须：硼酸铝、钛酸钾与均聚聚丙烯(PP)进行二元熔融共混改性，其次采用两种改性剂对PP进行三元共混改性。结果表明：弹性体虽能增加聚丙烯的韧性，但是其拉伸强度有相当大下降，粘土虽能同时提高聚丙烯的韧性与强度，但是增韧的幅度有限，晶须增强、增韧效果较差。POE与OREC对PP有协同增强增韧作用，三元共混体系POE／OREC／PP在适当配比时的力学性能有较大幅度的改善，其冲击性能比纯PP提高204．％，比二元体系POE／PP提高15．6％，拉伸强度比纯PP下降15．6％，比二元体系POE／PP提高22．6％。     

PP／HDPE／POE共混物的流变行为与力学性能

论述了采用茂金属催化乙烯-辛烯共聚物（Engage，POE）对聚丙烯和聚丙烯／高密度聚乙烯共混物进行了增韧改性。研究了共混物的稳态流变性能和小振幅振荡剪切流场下的动态粘弹性质，探讨了共混物的相态结构、粘弹性与抗冲击性能之间的关系。结果表明，当POE用量仅为5％时，POE对两种基体具有显著的增韧作用，尤其是显著提高了PP／HDPE共混物的低温韧性。在本实验的共混物组成配比下，共混物具有类网状的相态结构，各组分之间的界面相互作用增强，进而导致共混物的粘度增大和冲击韧性增加。     

粉状聚丙烯增韧增强研究

采用机械共混方法对粉状聚丙烯（PP）进行了增韧增强研究，探讨了增韧剂、增强剂和有少量自制的固相甲基丙烯酸（MAA）接枝粉状聚丙烯（PP-g-MAA)作增容剂存在下对粉状PP共混体系力学性能的影响，用热重分析法考察了改性粉状PP的热性能。结果表明，（乙烯／丙烯／二烯）共聚物（EPDM）／高密度聚乙烯（HDPE）为复合增韧剂，具有协同作用，可显著提高共混物的冲击强度：PP-g-MAA能明显改善PP／玻纤两相的界面结合力；PP／EPDM／HDPE玻璃纤维共混体系可以获得理想的增韧增强效果。     

相容剂对PP/PA6复合材料力学性能的影响

研究了2种相容荆PP—g-MAH（马来酸酐接枝聚丙烯）、POE—g—MAH（马来酸酐接枝乙烯辛烯共聚物）对PP／PA6（聚丙烯／聚酰胺6）共混体系力学性能的影响。研究结果表明，2种相容荆的加入都使PP／PA6体系的相容性增加，但PP—g—MAH的加入主要表现为增强效果，而POE-g-MAH的加入主要表现为增韧效果。     

聚丙烯/乙烯-辛烯-1共聚物共混体系流变性能研究

采用高级流变扩展系统(ARES)研究了聚丙烯(PP)/乙烯-辛烯共聚物共混体系的流变性能,探讨了乙烯-辛烯共聚物含量和 PP 种类对共混体系储能模量、剪切黏度和零切黏度的影响。实验结果显示,PP 结构和 POE 含量对 PP/POE 共混体系的剪切流变性能有显著影响,随着 POE 含量的增加,PP1/POE 共混体系的储能模量和剪切黏度增加的幅度明显小于 PP2/POE 共混体系,PP1/POE 共混体系和 PP2/POE 共混体系的储能模量和剪切黏度增加幅度较大分别发生在 POE 含量为20%～30%和10%～20%,即共混体系发生"脆—韧"转变阶段。PP/POE 共混体系中存在界面滑移现象,且 PP 和 POE 的界面相容性对界面滑移现象影响较大,其中 PP1/POE 的界面滑移比PP2/POE 的界面滑移更加明显。     

PP/M-HOS/POE三元复合材料的界面改性与力学性能

采用马来酸酐接枝聚丙烯(PP-g-MAH)及马来酸酐接枝乙烯-1-辛烯共聚物(POE-g-MAH)为界面相容剂，利用熔融共混法制备PP／镁盐晶须(M—HOS)／POE三元复合材料，研究了PP-g-MAH及POE-g-MAH的用量及配比、M-HOS和POE的用量对三元复合材料力学性能的影响。结果表明：当PP／M-HOS／POE的质量比为100／10／20时，PP-g-MAH的最佳用量为3份；利用PP-g-MAH及POE-g-MAH作为复合相容剂可同时改善M-HOS与PP和POE的界面相容性，促进POE、M-HOS对PP的增韧补强作用，使三元复合材料的力学性能得到了明显的改善。     

交联硫化体系对PP／POE／EPDM热塑性弹性体性能的影响

采用动态硫化法制备聚丙烯／聚烯烃弹性体／三元乙丙橡胶（PP/POE／EPDM）共混型热塑性弹性体,研究了交联前后不同POE／EPDM并用对比体系力学性能的影响。采用交联剂过氧化二异丙苯（DCP）及DCP／S硫化体系对PP／POE／EPDM体系进行硫化,研究了力学性能的变化。结果表明,EPDM可有效降低材料的硬度和断裂永久变形。助交联剂硫黄（S）对PP／POE／EPDM体系有较好的硫化作用,固定DCP用量为3份,S用量为0．4份时,体系力学性能最佳,交联对体系硬度影响很小。     

高流动性PP增韧体系流变性能的研究

利用毛细管流变仪和转矩流变仪对高流动性聚丙烯（PP）增韧体系的流变性能进行分析,讨论了聚烯烃弹性体（POE）、三元乙丙橡胶（EPDM）=增韧母料和降温母料等助剂对高流动性PP共混体系流变性能的影响,并对PP/POE共混体系和PP/EPDM共混体系的转矩流变曲线进行了对比,考察了不同共混体系的微观结构、力学性能和加工性能。     

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。     

高流动性聚丙烯增韧体系的研究

比较了聚烯烃弹性体、三元乙丙橡胶等对聚丙烯的改性效果,讨论了在增韧母料和降温母料的共同作用下这两种增韧剂的不同影响,对不同体系的扫描电镜结果和结晶参数进行了分析。     

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。     

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     

Mechanical properties,morphology, and crystallization behavior of polypropylene/elastomer/talc composites

In this study, polypropylene/ethylene–octene copolymer (PP/POE) blends, PP/talc, and PP/POE/micro‐talc (MT) composites were fabricated using a twin screw. To estimate the performances of the PP/POE blends, PP/talc, and PP/POE/MT composites, mechanical properties, heat deflection temperature (HDT), thermomechanical analysis, and isothermal crystallization characterization were conducted. Incorporating talc particles increased the tensile strength, flexural properties, and HDT of the PP matrix, but reduced the elongation at break and notched impact strength. The inclusion of POE elastomers in the PP matrix yielded the opposite effect on PP/talc composites. PP/POE/MT composites provide a compromise that improves both the flexural properties and notched impact strength. Moreover, the inclusion of talc particles in PP/POE blends induced heterogeneous nucleation and considerably reduced the crystallization time. Consequently, the time required for processing was also greatly reduced. POLYM. COMPOS., 36:69–77, 2015. © 2014 Society of Plastics Engineers     

马来酸酐接枝PP／POE共混物对PC的改性研究

使用本实验室自制的(PP／POE)-g-MAH共混物作为聚碳酸酯(PC)的改性剂。研究了不同改性剂用量对PC共混物的力学、热学、加工及耐沸水性能的影响。结果表明，加入5％的(PP／POE)-g-MAH可明显提高PC的缺口冲击强度，改善PC的加工性能和耐沸水性能，从而得到一种综合性能较好的材料。同时使用扫描电镜对改性共混物的液氮脆断断面进行了观察。     

Effect of the compatibilizer on the morphology and properties of dynamically cured PP/POE/epoxy blends

Dynamic vulcanization was successfully applied to epoxy resin reinforced polypropylene (PP)/ethylene‐octene copolymer (POE) blends, and the effects of different compatibilizers on the morphology and properties of dynamically cured PP/POE/epoxy blends were studied. The results show that dynamically cured PP/POE/epoxy blends compatibilized with maleic anhydride‐grafted polypropylene (MAH‐g‐PP) have a three‐phase structure consisting of POE and epoxy particles dispersed in the PP continuous phase, and these blends had improved tensile strength and flexural modulus. While using maleic anhydride‐grafted POE (MAH‐g‐POE) as a compatibilizer, the structure of the core‐shell complex phase and the PP continuous phase showed that epoxy particles could be embedded in MAH‐g‐POE in the blends, and gave rise to an increase in impact strength, while retaining a certain strength and modulus. DSC analysis showed that the epoxy particles in the blends compatibilized with MAH‐g‐PP were more efficient nucleating agents for PP than they were in the blends compatibilized with MAH‐g‐POE. WAXD analysis shows that compatibilization do not disturb the crystalline structure of PP in the blends. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

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