反应性加工PA-6/TPO-g-MAH共混物的研究

采用反应性挤出制备了ＰＡ６／ ＴＰＯｇＭＡＨ 超韧尼龙,研究了合金产品的性能,结果表明,当ＰＡ６∶ＴＰＯｇＭＡＨ 用量比７０∶３０ 时,合金的冲击强度比纯ＰＡ－ ６ 提高了约４ 倍,刚性降低不大,具有和弹性体超韧尼龙相同的力学性能。     

PA6─PEO二胺─BAPA嵌段共聚型抗静电剂共混改性涤纶的研究

在少量水存在下，将聚氧乙烯二胺（ＰＥＯ二胺）及Ｎ，Ｎ－二（３－氨丙基）甲胺（ＢＡＰＡ）与等摩尔的己二酸成盐后，再与己内酰胺共聚制得ＰＡ６－ＰＥＯ二胺－ＢＡＰＡ嵌段共聚物，然后将共聚物与ＰＥＴ切片进行共混熔融纺丝、拉伸，得到ＰＥＴ／ＰＡ６－ＰＥＯ二胺－ＢＡＰＡ共混改性纤维。研究发现，嵌段共聚物中低聚物含量少，改性纤维具有良好的可纺性、拉伸性及较高的强度保持值，共混纤维的抗静电性优良，还同时具有分散染料和酸性染料的可染性。对改性纤维进行季铵化处理后，可获得更加优越的抗静电效果。     

第六届中日建材交流会玻璃钢组考察报告

第六届中日建材交流会玻璃钢组考察报告陈博（中国玻璃钢工业协会１００８３１）ＮＶＥＳＴＩＧＡＴＩＯＮＲＥＰＯＲＴＯＦＴＨＥＦＲＰＧＲＯＵＰＡＴ６ＴＨＣＨＩＮＡ－ＪＡＰＡＮＢＵＩＬＤＩＮＧＭＡＴＥＲＡＬＥＸＣＨＡＮＧＭＥＥＴＩＮＧ￥ＣｈｅｎＢｏ（Ｃｈｉｎ...     

PA6─PEO二胺─BAPA嵌段共聚型抗静电剂共混改性涤纶的研究

在少量水存在下，将聚氧乙烯二胺（ＰＥＯ二胺）及Ｎ，Ｎ－二（３－氨丙基）甲胺（ＢＡＰＡ）与等摩尔的己二酸成盐后，再与己内酰胺共聚制得ＰＡ６－ＰＥＯ二胺－ＢＡＰＡ嵌段共聚物，然后将共聚物与ＰＥＴ切片进行共混熔融纺丝、拉伸，得到ＰＥＴ／ＰＡ６－ＰＥＯ二胺－ＢＡＰＡ共混改性纤维。研究发现，嵌段共聚物中低聚物含量少，改性纤维具有良好的可纺性、拉伸性及较高的强度保持值，共混纤维的抗静电性优良，还同时具有分散染料和酸性染料的可染性。对改性纤维进行季铵化处理后，可获得更加优越的抗静电效果。     

复合包装膜用尼龙的制备及其性能研究

添加少量纳米ＳｉＯ２于己内酰胺单体中进行聚合,制备了ＳｉＯ２达到纳米级分散的尼龙６（ＰＡ６）。对ＳｉＯ２的分散工艺、ＰＡ６的结晶行为和力学性能进行了研究。结果表明,纳米ＳｉＯ２是ＰＡ６的有效结晶成核剂和理想的增韧剂;含纳米ＳｉＯ２的ＰＡ６,其球晶微细均匀,冲击韧性显著提高;用于生产ＰＡ６复合包装膜时,各项性能满足要求。     

马来酸酐接枝乙烯—1—辛烯共聚物及其应用

采用熔融法制备了乙烯－１－门牌烯共聚物（ＰＯＥ）接枝马来酸酐（ＭＡＨ），讨论了引发剂、单体、交联抑制剂用量对接枝率和凝胶率的影响。通过对不同引发剂双２，５、过氧化二异丙苯（ＤＣＰ）、及自制复配引发剂的比较，发现采用自制复配引发剂并加入适量交联抑制剂可以在获得较高接枝率的同时，降低接枝产物的凝胶率，得到流动性好的无色或浅苋色的ＰＯＥ－ｇ－ＭＡＨ。接枝改性产物应用于氢氧化铝填充聚乙烯体系和超强超韧尼龙体系，均获得很好的效果。     

聚苯醚／PA6／弹性体多相共混物的形态结构和冲击性能研究

以ＳＥＢＳ,ＳＥＢＳ－ｇ－ＭＡＨ,ＰＯＥ－ｇ－ＭＡＨ作为增韧改性剂,单独或并用对聚苯醚（ＰＰＯ）／ＰＡ６共混物进行增韧。ＴＥＭ的结果显示,在所制备的多相体系中,ＳＥＢＳ大多被包容在ＰＰＯ分散要中;而ＳＥＢＳ－ｇ－ＭＡＨ和ＰＯＥ－ｇ－ＭＡＨ均分散在ＰＡ６的基体中,形成了多种形态结构。冲击断面下方应力发白区的ＴＥＭ照片上有大量的空穴,表明弹性体的空穴化是诱发剪切带,从而吸引能量的根源。     

几种聚乙烯树脂流变性能的研究

利用ＨＡＡＫＥ ＲＨＥＯＣＯＲＯ ９０转矩流变仪对三种ＬＬＤＦＥ（ＤＦＤＡ７０４２、ＤＦＤＡ７０４７、ＤＦＤＡ７０６８），两种ＨＤＰＥ（ＤＧＤＡ６０９８、ＧＦ７７５０）及两种ＬＤＰＥ（２Ｆ２Ｂ、１Ｉ２Ａ），进行了流变性能测试，得到其流变曲线，对比分析了挤出压力不稳定性和熔体破裂情况，为这几种聚乙烯树脂的适用性提供了基础数据。     

离子型聚酯／聚酰胺6共混物的结构和性能

采用透射电子显微镜、差示扫描量热法研究了离子型聚酯（ＩＰＥＴ）／聚酰胺６体系（ＩＰＥＴ／ＰＡ６）共混物的相结构和热性能,并用Ｉｎｓｔｒｏｎ３２１１型毛细管流变仪研究了共混物的流变特性。研究表明,ＩＰＥＴ／ＰＡ６体系为热力学不相容体系,表现出两相共存的特征,分散相ＩＰＥＴ呈絮状均匀分散于ＰＡ６基体中。共混物的熔点与ＰＡ６相近,熔融焓降低。共混物熔体属切力变稀的假塑性流体。     

LARGE SCALE PURIFICATION OF PHOSPHOGLYCERATE KINASE（PGK） AND GLYCERALDEHYDE 3－PHOSPHATE DEHYDROGENASE（GAPDH） FROMYELLOW PEAS BY PEG／REPPAL PES AQUEOUS TWO PHASE SYSTEM AND ION EXCHANGE CHROMATOGRAPHY

ＬＡＲＧＥＳＣＡＬＥＰＵＲＩＦＩＣＡＴＩＯＮＯＦＰＨＯＳＰＨＯＧＬＹＣＥＲＡＴＥＫＩＮＡＳＥ（ＰＧＫ）ＡＮＤＧＬＹＣＥＲＡＬＤＥＨＹＤＥ３－ＰＨＯＳＰＨＡＴＥＤＥＨＹＤＲＯＧＥＮＡＳＥ（ＧＡＰＤＨ）ＦＲＯＭＹＥＬＬＯＷＰＥＡＳＢＹＰＥＧ／ＲＥＰＰＡＬ...     

PA6/POE/SWR-3A超韧共混改性的研究

采用SWR-3A（POE—g—MAH）作为增容剂，研究了POE对PA6／POE／SWR-3A共混物的力学性能、耐热性和流变性能的影响。结果表明：在12．5份增容剂SWR-3A存在的条件下，随着POE 8150用量增大，共混物的缺口冲击强度不断增大，而拉伸强度、维卡耐热温度、表观粘度降低。当POE 8150用量超过12．5份时，共混物达到超韧。在PA6／POE／SWR-3A共混体系中，SWR-3A具有增容和增韧的双重作用。     

PA6／POE／EAA共混体系的相态与性能的研究

采用乙烯－1－辛烯共聚物弹性体（POE）为增韧剂、乙烯－甲基丙烯酸共聚物（EAA）作为增溶剂制备了以尼龙6（PA6）为基体的PA6／POE／EAA共混合金。详细研究了弹性体用量与共混体系的亚微观相态、力学性能和流变性能的关系。结果表明随着弹性体含量的增加，共混体系的分散相粒子尺寸大小没有明显变化，共混体系的冲击强度增加，拉伸强度和弯曲弹性模量降低。弹性体的增加使体系的熔体粘度降低，改善了体系的加工性能，但当POE增加到20％时，随着POE的增加，粘度不再下降。     

High performance polyamide 6 composites prepared by reactive extrusion

To improve the properties of polyamide 6 (PA6) composites, a series of modified PA6 composites was prepared by reaction extrusion. An amorphous PA6 was first obtained by the complexing reaction of Li⁺ in lithium chloride with amino groups, and then epoxy resins, nano‐SiO₂ as well as POE‐g‐MAH were in turn added into the PA6/LiCl system. The effect of different additives on the crystallization behavior and mechanical properties of PA6 composites was well‐studied by X‐ray diffraction (XRD), differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), scanning electron microscopy (SEM), and mechanical properties tests. The results demonstrated that PA6 was amorphous at 6 phr lithium chloride and a network structure was formed in PA6 matrix in the presence of epoxy resins, thus the mechanical properties of composites greatly were enhanced. However too many nano‐SiO₂ particles might impair the tensile strength of PA6 composites. Additionally, a PA6 composite with excellent properties was obtained in the presence of POE‐g‐MAH due to the crystal form change in PA6 matrix and the strong interaction between PA6 and POE‐g‐MAH. POLYM. COMPOS., 35:985–992, 2014. © 2013 Society of Plastics Engineers     

增容剂EAA对PA6／POE共混体系的相态及性能的影响

采用乙烯－丙烯酸共聚物（EAA）作为尼龙6／乙烯－1－辛烯共聚物弹性体（POE）共混体系的增容剂,详细研究了增容剂用量与共混体系的相态、力学性能和流变性能的关系。结果表明相容剂的加入使共混体系的分散性大大改善,分散相POE粒子明显细化,粒子较均匀地分散在PA6连续相中;相容剂的加入使体系韧性明显提高,拉伸强度和弯曲弹性模量下降,加工性能也得到改善,而且当每100份PA6／POE用量为85／15、EAA用量在4月份左右时,其增容作用达到饱和,综合性能达到最优。     

Polyamide-6/Poly(lactic acid) Blends Compatibilized by the Maleic Anhydride Grafted Polyethylene-Octene Elastomer

To evaluate the feasibility of a strategy to partially replace polyamide-6 (PA6) with poly(lactic acid) (PLA), the morphology, mechanical, and thermal properties of PA6/PLA blending systems were investigated. Polyethylene-octene elastomer (POE) and POE grafted with maleic anhydride (POE-g-MAH) are added to improve the impact strength and elongation at break of the blend. The results show that POE-g-MAH is an effective compatibilizer for PA6/PLA blending system. Compared with the morphology of PA6/PLA/POE, smaller particle size, more homogeneous distribution of domains and improved interfacial adhesion between matrix and domains were observed in the PA6/PLA/POE-g-MAH blending system.     

Study on the microstructures and mechanical behaviour of compatibilized polypropylene/polyamide‐6 blends

A series of blends of polypropylene (PP)–polyamide‐6 (PA6) with either reactive polyethylene–octene elastomer (POE) grafted with maleic anhydride (POE‐g‐MA) or with maleated PP (PP‐g‐MA) as compatibilizers were prepared. The microstructures and mechanical properties of the blends were investigated by means of tensile and impact testing and by scanning electron microscopy and transmission electron microscopy. The results indicated that the miscibility of PP–PA6 blends was improved with the addition of POE‐g‐MA and PP‐g‐MA. For the PP/PA6/POE‐g‐MA system, an elastic interfacial POE layer was formed around PA6 particles and the dispersed POE phases were also observed in the PP matrix. Its Izod impact strength was four times that of pure PP matrix, whilst the tensile strength and Young's modulus were almost unchanged. The greatest tensile strength was obtained for PP/PA6/PP‐g‐MA blend, but its Izod impact strength was reduced in comparison with the pure PP matrix. © 2002 Society of Chemical Industry     

PP/POE/PA6三元共混物相形态的预测及受混炼顺序的影响

引言对聚合物进行共混是改善其性能的重要方法,多元聚合物共混物结合了多种聚合物的优点,具有更多独特的性能,因此对多元尤其是三元共混物的研究越来越多[1-5]。聚合物共混物的相形态对其性能有着决定性的影响[6-9],因而相形态是共混物研究的一个非常重要的方面[9-12]。     

Compatibilization and toughening of poly(2,6‐dimethyl‐1,4‐phenylene oxide)/polyamide 6 alloy with poly(ethylene 1‐octene): Mechanical properties,morphology, and rheology

Blends of a poly(2,6‐dimethyl‐1,4‐phenylene oxide) (PPO)/polyamide 6 (PA 6) alloy toughened with a novel polyolefin elastomer poly(ethylene‐1‐octene) (POE) were prepared via melt extrusion. In order to improve the compatibilization between POE and the PPO/PA 6 alloy, POE was grafted with maleic anhydride (MA), which could react with the amine group of PA 6. The Izod impact strength of the blends exhibited an optimum when the extent of MA grafting of POE was changed, which is an order of magnitude higher than that of the untoughened blends. The morphology revealed that the size of the POE particles decreased with an increasing MA grafting ratio of POE. Studies on the tensile properties and rheology of the blends were also carried out. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 88: 3110–3116, 2003     

马来酸酐含量及制备工艺对PA6/POE-g-MAH/Nano-CaCO3复合材料形态及力学性能的影响

通过改变共混物中乙烯辛烯共聚物（POE）与马来酸酐接枝POE（POE-g-MAH）的比例,研究了MAH含量对聚酰胺6（PA6）/POE/POE-g-MAH/纳米碳酸钙（nano-CaCO3）复合材料的微观结构和力学性能的影响。结果表明,MAH含量较高时,POE-g-MAH与PA6基体的相容性好,复合材料的冲击强度最高;制备工艺对复合材料的形态及力学性能有很大影响,采用两步法制备的复合材料中nano-CaCO3分散效果更好,其增容作用使弹性体分散相直径增大约100 nm,冲击强度较一步法提高21 %。     

共混工艺对PP/PA6/纳米SiO2复合材料力学性能的影响

以聚丙烯（PP）作为基体,经表面处理过的纳米二氧化硅（nano-SiO2）和刚性聚合物尼龙6（PA6）作为改性剂,添加5％的接枝POE作增容剂,采用不同的共混工艺制备PP／PA6／纳米SiO2复合材料。研究了熔融共混挤出次数和共混方法对PP／PA6／纳米SiO2复合材料力学性能的影响,借助扫描电子显微镜从断面形貌上分析了影响复合材料力学性能的因素。结果表明：采用二次挤出熔融共混比一次挤出熔融共混制得的复合材料力学性能要好;采用PP与纳米SiO2先熔融共混挤出制得粒料,再用PA6、接枝POE与粒料熔融共混挤出的共混方法制得的复合材料综合力学性能最优。