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SELF-ASSEMBLY OF ALIGNED MULTI-WALLED CARBON NANOTUBES IN POLYPROPYLENE-COATED MULTI-WALLED CARBON NANOTUBES COMPOSITES
关键字：Multi-walled carbon nanotubes (MWNTs), Polypropylene (PP), Aligned,Composites
Polypropylene (PP)-coated multi-walled carbon nanotubes (MWNTs) composite with MWNTs exceptional alignment dispersed and improved mechanical properties was prepared with maleic anhydride (MAH) as a compatibilizer and poly (butyl methacrylate) (PBMA) ...
http://www.polymer.cn/research/dis_info8535 |
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PP-g-AN接枝共聚物耐候性研究
关键字：聚丙烯；耐候性；接枝率
采用高压溶液法制备了高接枝率的丙烯腈-聚丙烯接枝共聚物(PP-g-AN)；通过紫外光加速老化、自然老化实验处理PP-g-AN试样，研究了接枝率、老化时间等对PP-g-AN耐候性能的影响。结果表明,PP-g-AN接枝共聚物老化后的拉伸强度保持率、伸长率保持率、冲击强度保持率均优于耐候聚丙烯的理化指标。
http://www.polymer.cn/research/dis_info8337 |
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EFFECTS OF CONCENTRATION, pH, AND TEMPERATURE ON INK REMOVAL FROM PRINTED POLYPROPYLENE (PP) SHEETS BY ALKYL-TRIMETHYLAMMONIUM BROMIDES
关键字：EFFECTS,CONCENTRATION,AND,TEMPERATURE,INK,REMOVAL,FROM,PRINTED,POLYPROPYLENE,SHEETS,ALKYL,TRIMETHYLAMMONIUM,BROMIDES,
Ink removal form printed polypropylene (PP) is performed by using alkyltrimethyammonium bromides (CnTAB) having different carbon atoms of the alkyl chain length, 12, 14 and 16 for dodecyl-, tetradecyl- and hexadecyl-trimethylammonium bromides(i....
http://www.polymer.cn/research/dis_info5751 |
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a study on influence of resin property on filling balance of multi-cavity molds by visualization method
关键字：Injection mold, Multy-cavity, Filling balance, Visualization, Elastomer, Glass fiber reinforced PP
filling balance of multi-cavity molds is an important problem of injection molding technology. filling balance is not only influenced by molding parameters, but also influenced by property of resin.
http://www.polymer.cn/research/dis_info5396 |
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PP注塑成型沿流动方向的结构与性能演变
关键字：注塑形态，皮芯结构，WAXD
由于注射过程中熔体的喷泉流动行为，结晶性高分子材料的注塑形态常常显示为一种“夹心饼式”的多层结构。同时由于受到的剪切和热历史不同，材料的这种多层结构随距离浇口的远近呈现梯度变化，在靠近浇口端和远离浇口一端，其结构和性能存在着巨大的差异。本文详细研究了一种共聚型PP（EPS30R，昆仑石化）的注塑形态，并重点考察了近浇口端（近端）和远离浇口端（远端）的结构与性能差异。实验中试样为矩形长条试样（176×1...
http://www.polymer.cn/research/dis_info4998 |
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高性能PP/PC/POE共混材料研究
关键字：聚丙烯 聚碳酸酯 增容剂 刚韧平衡
传统的弹性体增韧聚丙烯（PP），在韧性得到提高的同时，PP的力学强度大幅下降，不能作为结构材料使用，如何在增韧同时保持其刚性、获得刚韧平衡PP共混材料已成为重要的研究课题。PC具有优异的强韧性，可以在增韧的同时保持PP较高的力学强度，但由于二者在极性和溶解度参数上存在较大差异，PP和PC的相容性极差。本文以聚烯烃弹性体POE为PP增韧弹性体，选用一种SBS类嵌段共聚物作为PP/PC/POE共混体系的新型相容剂，制备了高韧高强PP/...
http://www.polymer.cn/research/dis_info3829 |
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PP-g-GMA-St对聚丙烯/滑石粉复合材料的增容作用
关键字：聚丙烯 复合材料
聚丙烯来源丰富、价格便宜、易于加工成型、产品作品能够和性能优良，用途非常广泛，已经成为通用树脂中发展最快的品种。但是聚丙烯也才能在低温脆断、抗如变形差、制品尺寸稳定性差、于其他极性聚合物或无机填料的相容性差等不足之处，从而限制了聚丙烯的进一步应用。
http://www.polymer.cn/research/dis_info3480 |
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稀土氧化物对PP-g-MAH反应的影响研究
关键字：接枝共聚物 稀土氧化物
聚烯烃熔体接枝功能单体通过采用邮寄过氧化物作为引发剂，但引发剂的半衰期、引发剂分解产生的自由给予聚烯烃基体、功能单体、引发剂等组分的反应活性，引发剂的溶解性和在多相容体重个相间的分配系数和引发剂的笼反应程度等，将在不同程度上影响其引发效果。
http://www.polymer.cn/research/dis_info3071 |
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A NEW UNDERSTANDING OF THE RUBBER-TOUGHENING MECHANISM IN DYNAMIC PACKING INJECTION MOLDED PP/EPDM BLENDS
关键字：NEW,UNDERSTANDING,THE,RUBBER,TOUGHENING,MECHANISM,DYNAMIC,PACKING,INJECTION,MOLDED,EPDM,BLENDS,
In this work, the dynamic packing injection molding (DPIM) technology was used to study the rubber toughening mechanism in PP/EPDM blends. The samples with different shape such as dumbbell and plate shape have been prepared. ...
http://www.polymer.cn/research/dis_info3070 |
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增容PP/回收PET共混物的动态流变行为
关键字：增容,回收,PET,混物,动态,流变,
本工作用双螺杆挤出机制备了未增容与增容的PP/回收PET（r-PET）共混物，所用相容剂为聚丙烯接枝马来酸酐（PP-g-MA）和聚丙烯接枝甲基丙烯酸缩水甘油酯（PP-g-GMA），高级旋转流变仪研究了共混物在260℃时的动态流变行为。研究结果表明，增容与未增容共混物的动态储能模量（G’）都随着扫描频率（ω）先减小后增大，即在低频处出现“第二平台”，认为这与r-PET粒子的形变驰豫和体系内部形成网络结构有关，此外，PP-g-MA对PP/r-PET共...
http://www.polymer.cn/research/dis_info1296 |
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