离聚物surlyn对PET/PA66共混物性能的影响

摘要：采用傅里叶红外光谱、示差扫描量热法（DSC）考察了离聚物surlyn对PET/PA66共混体系结构、结晶性能的影响;通过低剪切速率下流变性能测试、力学性能测试以及热变形温度测试,考察了离聚物对该体系流变性能、力学性能、耐热性能的影响。实验结果表明：加入离聚物Surlyn增加了界面的粘接力和分子间的链缠结,使共混体系的相容性得到了提高,其中以离聚物Surlyn含量在10%效果较好。     

离聚物增容PET/TLCP共混物的研究及应用

研究了聚对苯二甲酸乙二酯(PET)/热致液晶聚合物(TLCP)原位复合共混物的流变行为、相容性、熔体结晶、耐磨性和微观结构.结果表明,TLCP的加入降低了共混物的扭矩,而增容剂离聚物的加入却提高了扭矩;少量TLCP的加入提高了共混物的结晶速率和结晶度,但是离聚物的加入反而降低了其结晶速率和结晶度;TLCP的加入能提高PET的耐磨性,离聚物的加入使PET/TLCP共混物的耐磨性进一步提高,离聚物的质量分数为5%时,PET/TLCP共混物的耐磨性最佳;TLCP在PET中能原位形成微纤结构,离聚物加入使微纤变小,分布更均匀;利用离聚物增容PET/TLCP所制备的工业丝编织成的造纸网,其使用寿命延长了20%,经济效益显著.     

PET离聚物共混体系的结晶与熔融行为研究

利用ＤＳＣ对聚对苯二甲酸乙二酯（ＰＥＴ）与离聚物Ｓｕｒｌｙｎ和Ａｃｌｙｎ系列组成的共混体系的结晶与熔融行为进行了研究．结果表明，离聚物对ＰＥＴ的低温与高温结晶都有十分明显的促进作用，离聚物Ｎａ盐比离聚物Ｚｎ盐对ＰＥＴ的结晶加速作用显著。共混体系的熔融热焓随离聚物Ｎａ盐含量的增加有所降低，随Ｚｎ盐含量的增加稍有提高，两者的熔点及熔限与熔融热焓的变化规律一致．     

PET/离聚物共混体系的结晶行为研究

利用WAXD对聚对苯二甲酸乙二酯（PET）与高聚物Surlyn和Aclyn系列组成的共混体系的结晶行为进行了研究。结果表明，离聚物先于PET结晶，两者分别以各自的晶型出现，没有形成混晶、结晶时两相间有相互干扰;在所研究的范围内，PET／离聚物Na盐井混体系结晶度与纯PET的基本相同，PET／离聚物Zn盐井混体系的结晶度大于纯PET的结晶度，且离聚物含量的变化对其共混体系的结晶度的影响不明显。     

PC/PET/PE-g-MAM共混体系结晶性能的研究

采用PE-g-MAZn,PE-g-MANa离聚物增容PC/PET共混物,使共混体系相容性得到改善,同时由于离聚物自身成核作用的影响,使得PET的结晶性能发生变化。考察了离聚物接枝率及其用量变化对PC/PET/PE-g-MAM共混体系结晶性能及结晶形态的影响。结果表明,锌离聚物共混体系由于离聚物的成核作用较强,增容作用较弱,PET冷结晶温度随接枝率C增加出现一个极大值,晶粒增加,晶形及结晶度变化不大;钠离聚物共混体系由于离聚物增容作用较强,使共混物结晶形态及T_(gc),T_m,T_(mc)等呈现出不同于锌离聚物共混体系的特征。     

氯化聚乙烯离聚物对PP-R性能的影响

采用氯化聚乙烯接枝马来酸钠离聚物与无规共聚聚丙烯(PP-R)共混制备PP-R/离聚物共混材料,对其进行扫描电子显微镜、热重、差示扫描量热、维卡耐热、拉伸强度和弯曲强度等测试分析。结果表明,在离聚物质量分数为3%时,PP-R/离聚物共混材料具有较好的拉伸性能和较大的断裂伸长率,离聚物质量分数为5%时,共混材料弯曲强度达到最大,同时添加离聚物使共混材料的耐热性能有所提高,说明PP-R/离聚物共混材料中离聚物离子交联和离子–偶极作用起到了增容增强的作用。     

PBAT/PLA共混物的热力学性能和结晶性能的研究

利用熔融共混制备己二酸丁二醇酯-对苯二甲酸丁二醇酯共聚物(PBAT)/聚乳酸(PLA)共混物,采用Joncryl~? ADR-4368对共混体系进行改性,通过差示扫描量热法研究了共混比例和扩链剂的加入对该共混体系的热力学性能的影响,通过小角激光光散射和广角X射线衍射研究了共混比例和扩链剂的加入对该体系的结晶行为的影响,利用Elmendorf撕裂和拉伸测试分析该共混体系的力学性能。结果表明,共混之后PLA和扩链剂对PBAT有着成核作用。PBAT/PLA共混体系中PLA的冷结晶温度显著下降,PLA含量为20%时扩链剂的加入最终使得PLA的冷结晶消失。扩链剂的加入提高了PBAT的结晶能力,但未改变其晶型。PBAT/PLA共混后力学性能显著改善,且扩链剂的加入使得断裂伸长率提高约一倍。     

SPET离聚物与尼龙6共混纤维结构性能的研究

将分子链相对较为刚性的ＳＰＥＴ离聚物与尼龙６(ＰＡ６)进行共混纺丝实验,通过ＷＡＸＤ、ＤＳＣ、Ｓ－Ｓ曲线的测定等方法着重考察了体系中离子基团的引入对共混物结晶性、晶体结构、力学性能等的影响,结果表明:离聚物的存在有利于体系结晶成核,但也在一定程度上破坏了晶区的完善性。ＳＰＥＴ/ＰＡ６共混纤维的初始模量随其所含离聚物量的增多而下降。     

液晶离聚物在ABS/PBT共混体系中的增容研究

合成了一种含有磺酸基的液晶离聚物（LCI）,并研究了LCI作为相容剂对丙烯腈-丁二烯-苯乙烯三元共聚物/聚对苯二甲酸丁二醇酯（ABS/PBT）共混体系力学性能的影响。采用扫描电镜（SEM）、差示扫描量热仪（DSC）和热失重（TGA）分析对ABS/PBT/LCI共混物的热性能、微观形态和相容性进行了研究。研究结果表明LCI的加入,改善了二者的相容性,从而提高了共混物的拉伸强度、断裂伸长率以及缺口冲击强度。     

离聚物在PVC塑胶跑道中的应用研究

介绍了引入离聚物改性PVC共混体系在生产塑胶跑道中的应用研究。探讨了离聚物对PVC共混体系的改性机理,研究了引入不同含量的离聚物对PVC共混体系生产PVC塑胶跑道在加工应用方面和对产品力学性能的影响。结果表明:加入适量的离聚物,在物料的塑化性能、相容性、加工稳定性和产品的力学性能等方面都得到了改善和提高。     

Compatibilization of side‐chain,thermotropic, liquid‐crystalline ionomers to blends of polyamide‐1010 and polypropylene

A novel side‐chain, liquid‐crystalline ionomer (SLCI) with a poly(methyl hydrosiloxane) main chain and side chains containing sulfonic acid groups was used in blends of polyamide‐1010 (PA1010) and polypropylene (PP) as a compatibilizer. The morphological structure, thermal behavior, and liquid‐crystalline properties of the blends were investigated by Fourier transform infrared, differential scanning calorimetry, thermogravimetric analysis, and scanning electron microscopy. The morphological structure of the interface of the blends containing SLCI was improved with respect to the blend without SLCI. The compatibilization effect of greater than 8 wt % SLCI for the two phases, PA1010 and PP, was better than the effects of other SLCI contents in the blends. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 83: 2749–2754, 2002; DOI 10.1002/app.10179     

Crystallization behavior of poly(propylene)/polyamide 1010 blends using poly(propylene)-graft-glycidyl methacrylate as compatibilizer

Polyamide 1010/poly(propylene) (PA1010/PP) blends were investigated with and without the addition of poly(propylene)-graft-glycidyl methacrylate (PP-g-GMA). The effect of the compatibilizer on the thermal properties and crystallization behavior was determined by differential scanning calorimetry and wide-angle X-ray diffraction. From the results it is found that the crystallization of PA 1010 is significantly affected by the presence of PP-g-GMA. PP/PA 1010 (75/25) blends containing higher amounts of PP-g-GMA show concurrent crystallization at the crystallization temperature of PP. Isothermal crystallization kinetics also were performed in order to investigate the influence of the compatibilized process on the nucleation and growth mechanism. In the PP/PA 1010 (25/75) blends, concurrent crystallization behavior was not observed, even though the amount of PP-g-GMA was high.     

Morphology,thermal behavior,and mechanical properties of PA1010/PP and PA 1010/PP-g-GMA blends

The modification of polypropylene (PP) was accomplished by melt grafting glycidyl methacrylate (GMA) on its molecular chains. The resulting PP-g-GMA was used to prepare binary blends of polyamide 1010 (PA1010) and PP-g-GMA. Different blend morphologies were observed by scanning electron microscopy (SEM) according to the nature and content of PA1010 used. Comparing the PA1010/PP-g-GMA and PA1010/PP binary blends, the size of the domains of PP-g-GMA were much smaller than that of PP at the same compositions. It was found that mechanical properties of PA1010/PP-g-GMA blends were obviously better than that of PA1010/PP blends, and the mechanical properties were significantly influenced by wetting conditions for uncompatibilized and compatibilized blends. A different dependence of the flexural modulus on water was found for PA1010/PP and PA1010/PP-g-GMA. These behaviors could be attributed to the chemical interactions between the two components and good dispersion in PA1010/PP-g-GMA blends. Thermal and rheological analyses were performed to confirm the possible chemical reactions taking place during the blending process. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 64: 1489–1498, 1997     

Thermal,morphological, and mechanical characteristics of polypropylene/polybutylene terephthalate blends with a liquid crystalline polymer or ionomer

Thermotropic side‐chain liquid crystalline polymer (SLCP) and corresponding side‐chain liquid crystalline ionomer (SLCI) containing sulfonate acid were used in the blends of polypropylene (PP) and polybutylene terephthalate (PBT) by melt‐mixing respectively, and thermal behavior, morphological, and mechanical properties of two series of blends were investigated by differential scanning calorimetry, Fourier transforms infrared spectroscopy (FTIR), scanning electron microscopy, and tensile measurement. Compared with the immiscible phase behavior of PP/PBT/SLCP blends, SLCI containing sulfonate acid groups act as a physical compatibilizer along the interface and compatibilize PP/PBT blends. FTIR analyses identify specific intermolecular interaction between sulfonate acid groups and PBT, and then result in stronger interfacial adhesion between these phases and much finer dispersion of minor PBT phase in PP matrix. The mechanical property of the blend containing 4.0 wt % SLCI was better than that of the other blends. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 4712–4719, 2006     

PP—g—AA增容尼龙1010／聚丙烯三元共混体系性能研究

用反应挤出方法制备了聚丙烯接枝丙烯酸。用电子显微镜观测了不同ＰＰ－ｇ－ＡＡ含量的ＰＡ１０１０／ＰＰ／ＰＰ－ｇ－ＡＡ三元共混物的形态。与没有加ＰＰ－ｇ－ＡＡ的共混体系相比，增容共混中分散相尺寸明显减小，两相间镶嵌更深。ＰＰ－ｇ－ＡＡ作为第三组分加对其物理力学性能有一定程度的改善。     

相容剂和加工工艺对PA1010/PP共混体系形态和力学性能的影响

以马来酸酐（MAH）和苯乙烯（St）多单体熔融接枝聚丙烯[PP-g-(MAH-co-St）]为相容剂,制备了聚酰胺10101/聚丙烯（PA1010/PP）共混体系。用毛细管流变仪、扫描电子显微镜、力学性能测试等方法研究了和加工工艺相容剂对PA1010/PP共混体系的形态和力学性能的影响。结果表明,相容剂PP-g-(MAH-co-St)有效降低了PA1010/PP共混体系的熔体流动速率;该共混体系熔体属于假塑性流体,熔体黏度随PP-g-(MAH-co-St)含量的增加逐渐增大;随着相容剂含量的增加,PA1010/PP共混体系中分散相PP的粒径逐步减小,力学性能得到改善,PA1010/PP/PP-g-(MAH-co-St)为70/25/5和70/20/10的共混体系的拉伸强度分别比PA1010/PP (70/30)共混体系提高了55.0 %和61.9 %,冲击强度分别提高了61.0 %和129.7 %;剪切速率为706.5 s-1时出现熔体破裂现象,剪切速率为5002.65 s-1时出现严重熔体破裂。     

Electroactive Polymer Blends Prepared In Situ Via Bulk Polymerization of Aniline in the Presence of Polyethylene

Abstract

The modification of polypropylene (more precisely, a propylene/ethylene random copolymer containing 10% ethylene) has been accomplished by melt grafting of acrylamide tertiary butyl sulfonic acid(ATBS) initiated with a radical initiator. The resulting PP-g-ATBS was used to prepare ternary blends of PA1O1O/PP-g-ATBS/PP and binary blends of PA1010/PP. The size of domains of PP in ternary blends is much smaller than that in binary blends. It was found that mechanical properties of ternary blends obviously surpassed that of binary blends. These behavior could be contributed to chemical interactions between sulfonic acid groups of PP-g-ATBS and end amino group of PA1010. Thermal and rheological analysis were performed to confirm the possible chemical reactions taken place during the blending process.     

Miscibility enhancement of PP/PBT blends with a side‐chain liquid crystalline ionomer

Side‐chain liquid crystalline ionomer (SLCI) containing sulfonic acid groups with a polymethylhydrosiloxane main‐chain was used in the blends of polypropylene (PP) and polybutylene terephthalate (PBT) as a compatibilizer. The crystalline behavior, morphological, and mechanical properties of the blends were investigated in detail by differential scanning calorimetry (DSC), polarizing optical microscope (POM), Fourier transforms infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). Revealed by the shift of T_m in DSC thermogram and the shift of the absorbed peak in FTIR spectra, specific interaction led to stronger interfacial adhesion between these phases, which resulted in much finer dispersion of the minor PBT phase in PP matrix. The SLCI containing sulfonate acid groups acted as physical crosslinking agent along the interface, which compatibilized PP/PBT blends. The mechanical property of the blends including 4 wt % SLCI contents was better than that of other SLCI contents in the blends. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009     

MORPHOLOGY,CRYSTALLIZATION BEHAVIORS,AND MECHANICAL PROPERTIES OF PA1010/HIPS AND PA1010/HIPS-g-MA BLENDS

The binary blends of polyamide 1010 (PA1010) with the high-impact polystyrene (HIPS)/maleic anhydride (MA) graft copolymer (HIPS-g-MA) and with HIPS were prepared using a wide composition range. Different blend morphologies were observed by scanning electron microscopy according to the nature and content of PA1010 used. Compared with the PA1010/HIPS binary blends, the domain sizes of dispersed-phase particles in PA1010/HIPS-g-MA blends were much smaller than that in PA1010/HIPS blends at the same compositions. It was found that the tensile properties of PA1010/HIPS-g-MA blends were obviously better than that of PA1010/HIPS blends. Wide-angle x-ray diffraction analyses were performed to confirm that the number of hydrogen bonds in the PA1010 phase decreased in the blends of PA1010/HIPS-g-MA. These behaviors could be attributed to the chemical interactions between the two components and good dispersion in PA1010/HIPS-g-MA blends.     

尼龙1010／马来酸酐接枝聚乙烯共混体系结晶行为和力学性能的研究

将尼龙1010与马来酸酐接枝聚乙烯进行熔融共混,使用DSC、扫描电镜等方法研究了共混物的结晶行为、共混物形态以及力学性能。结果表明:接枝聚乙烯通过与尼龙1010在熔融共混时生成的接枝共聚物改善了共混组份两相之间的相容性和共混形态;共混物中尼龙组份的结晶熔融热焓下降;共混物在保持较高刚性的同时其干态及低温冲击性能较纯尼龙1010有明显提高。