PBT/ABS合金增容体系的研究

研究了3种不同结构的相容剂对聚对苯二甲酸丁二醇酯/丙烯腈-丁二烯-苯乙烯三元共聚物（PBT/ABS）共混合金的力学性能和熔体流动速率的影响,并采用扫描电镜和差示扫描量热仪对PBT/ABS共混合金的相界面、相容性及结晶度进行了表征。结果表明,带有环氧官能团的相容剂KS-TD-00202能有效地提高PBT/ABS共混合金的相容性,在提高共混合金缺口冲击强度的同时,不降低拉伸强度和弯曲强度,也不影响共混合金的加工流动性,同时提高了PBT在共混合金中的结晶度。     

相容剂对PBT／PC共混体系性能的改进

用DSC方法测试了PBT/PC（50/50,质量份）及经过相容剂（为PS接枝橡胶）处理的共混物,研究了相容剂用量对共混体系力学性能的影响。结果表明：相容剂的加入可使共混物中PBT的特点、熔融焓、结晶温度都分别比纯PBT有所降低,熔体流动速率和热变形温度有所下降。采用相容剂提高了PBT/PC共混体系两相间的相容性,改善了PBT的冲击性能,相容剂用量为15质量份时冲击强度达到最大值。     

玻纤增强PA66/PBT合金的相形态及力学性能研究

通过熔融共混法制备了玻纤增强聚己二胺己二酸(PA66)/聚对苯二甲酸丁二醇酯(PBT)合金,研究了自制相容剂对玻纤增强PA66/PBT合金力学性能及相形态的影响。DSC及SEM结果表明,加入5%自制容剂能有效增容PA66和PBT,减少分散相的相尺寸,使合金的力学性能特别是合金的冲击性能达到甚至超过玻纤增强PA66的力学性能,同时合金的吸水率随合金体系中PBT用量的增加而大幅降低。     

耐油酯耐低温ABS/PBT合金的制备与性能研究

ABS材料由于其耐油酯性能和低温冲击性能较差,应用受到一定的局限性。文章通过双螺杆挤出机制备了耐油酯耐低温ABS/PBT合金,考察树脂的选择、PBT含量、相容剂含量、增韧剂种类及含量对ABS/PBT合金的力学性能、耐油酯、低温冲击性能的影响。结果表明,将PBT与ABS共混能改善ABS的耐油酯性能,同时选择中粘PBT更有利于ABS/PBT合金的制备;在ABS/PBT合金中添加适量的相容剂,能有效地提高合金的各项性能;在ABS/PBT合金中添加MBS作为增韧剂,能更有效地提高合金的低温冲击性能。     

玻纤增强PBT/ASA合金的性能研究

研究了不同种类相容剂、不同添加量对玻纤增强聚对苯二甲酸丁二醇酯(PBT)/苯乙烯-丙烯腈-丙烯酸酯橡胶(ASA)合金的力学性能的影响。通过力学性能数据表明,苯乙烯-丙烯腈-甲基丙烯酸缩水甘油酯共聚物(SAG)能有效提高PBT/ASA合金的力学性能,能有效提高PBT/ASA合金的相容性,其最佳添加量为4%;通过扫描电子显微镜(SEM)结果证明了SAG可以很好地改善PBT/ASA合金之间的相容性。     

PPO/PBT合金性能的研究

聚苯醚(PPO)与聚对苯二甲酸丁二醇酯(PBT)的相容性不佳,提高合金的相容性可以改善合金力学性能。比较了不同粘度的聚苯醚以及不同相容剂对合金物理机械性能的影响。结果表明,低粘度的PPO与PBT共混合金的冲击强度最好,添加6份的G2相容剂,PPO/PBT合金的性价比最优。     

相容剂对PBT／PC共混物力学性能的影响

利用聚对苯二甲酸丁二醇酯(PBT)与聚碳酸酯(PC)之间的酯交换反应制备了几种PBT与PC的相容剂。相容剂对PBT／PC共混物力学性能的影响的研究表明：加入相容剂改善了PBT与PC两相间的相容性，共混体系力学性能得到提高。通过红外光谱分析得知，PBT、与PC之间的酯交换反应促进了PBT／PC共混体系的相容性，酯交换反应越强烈，得到的产物作为相容剂对PBT／PC共混体系的增容作用越明显；酯交换反应程度适中，得到的产物作为相容剂增容作用适中，共混体系综合力学性能较好。     

ABS回收料/PBT合金的增容改性

以丙烯腈–丁二烯–苯乙烯塑料回收料(rABS)为基体,将其与聚对苯二甲酸丁二酯(PBT)共混,制备了rABS/PBT合金,并以自制的甲基丙烯酸缩水甘油酯(GMA)接枝rABS(rABS-g-GMA)为相容剂,研究了PBT及rABS-gGMA对rABS/PBT合金力学性能和相态结构的影响。结果表明,PBT的加入提高了rABS的强度,但降低了韧性;随着rABS-g-GMA用量的增加,合金的拉伸和弯曲强度没有明显变化,但断裂伸长率和缺口冲击强度明显提升,当rABS/PBT质量比为70/30,rABS-g-GMA用量为15份时,合金的断裂伸长率和缺口冲击强度分别较未加相容剂的提高了147%和51.6%。rABS-g-GMA的加入提高了合金的损耗与储能模量以及损耗因子峰值,阻碍了合金中PBT的结晶,生成了更多的无定形区,促使PBT分散粒子尺寸减小,分布均匀,明显改善了rABS和PBT间的相容性。     

有机硅磷酸酯对PBT/PET酯交换反应的影响

采用两次循环扫描方法研究了有机硅磷酸酯对聚对苯二甲酸丁二醇酯/聚对苯二甲酸乙二醇酯（PBT/PET）酯交换反应的影响,测定了PBT/PET合金的结晶性能、热变形温度、力学性能和相对黏度,并与常规的抑制剂亚磷酸三苯酯进行了比较。结果发现：加入有机硅磷酸酯后PBT/PET合金的结晶温度提高了4.5 ℃,相对黏度提高了0.1 dL/g,热变形温度提高了7.0 ℃。而加入亚磷酸三苯酯后PBT/PET合金的结晶温度降低了1.5 ℃。说明有机硅磷酸酯可有效控制PBT/PET合金中端羟基的含量,从而可有效抑制PBT和PET之间的酯交换反应。亚磷酸三苯酯和有机硅磷酸酯的加入对PBT/PET体系的力学性能影响不大。     

PP／PA6共混体系性能的研究

本文进行PP／PA6的共混改性，讨论了相容剂、PBT、玻纤和云母粉的加入对PP／PA6共混体系的影响。结果表明：POE—g—MAH是PP／PA6的有效相容剂，能显著提高PP／PA6的力学性能；云母粉的加入使体系的弹性模量提高，耐热性能增加。     

玻璃纤维增强PC/PBT共混体系力学性能的研究

采用增容剂对玻璃纤维(GF)增强聚碳酸酯(PC)聚/对苯二甲酸丁二酯(PBT)共混体系进行改性,研究了不同成分组成对GF增强PC/PBT材料力学性能的影响,并用扫描电子显微镜观察了不同共混体系的形态结构。结果表明,GF可以提高共混体系的力学性能,当GF质量分数为28%时,共混体系的综合性能较好。     

Reduced graphene oxide reinforced PET/PBT nanocomposites: Compatibilization and characterization

This research work focused on the effects of different compatibilizers on the properties of reduced graphene oxide (rGO) reinforced poly(ethylene terephthalate) (PET)/poly(butylene terephthalate) (PBT) nanocomposites. The samples were prepared via melt compounding and injection molding methods. The Joncryl and glycidyl isooctyl polyhedral oligomeric silsesquioxane (GPOSS) were used as compatibilizers at different loading levels (0.5%-4%). The structural, thermal, mechanical, morphological, and electrical properties of the nanocomposites were investigated. The Fourier transform infrared analysis results revealed that no significant interaction was observed when GPOSS was added. On the other hand, there were more obvious changes in the peaks of the nanocomposite containing Joncryl. The thermal results showed that the compatibilizer addition caused small changes while rGO addition did not considerably affect the thermal stability of blend. The glass transition temperature of the nanocomposite significantly decreased with the addition of GPOSS. The tensile test indicated that compatibilizers improved the mechanical performance of PET/PBT/rGO nanocomposite.     

玻纤增强PTT及其性能研究

初步研究了聚对笨二甲酸丙二酯(PTT)固相聚合及其玻璃纤维(GF)增强工艺,探讨了PTT的热稳定性及GF含量和树脂特性粘度对GF增强PTT性能的影响,并对PTT与聚对苯二甲酸丁二酯(PBT)增强前后的性能进行了比较。结果表明,添加GF可大幅度提高GF增强PTT的力学性能和热性能;树脂特性粘度对未增强PTT缺口冲击强度和热变形温度的影响较为明显,但对GF增强PTT的性能影响较小;高粘度PTT的热稳定性较差;GF增强PTT、PBT的综合性能相差不大。     

The effect of fibre sizing and compatibilizer of polypropylene/poly(butylene terephthalate) blends on the mechanical and interphase properties of basalt fibre reinforced composites

The effect of basalt fibre sizing on the mechanical and interphase properties of fibre‐reinforced composites was studied. Two different chemical preparations of the fibre surface (PBT‐compliant and PP‐compliant) were used. The polymer matrix was prepared from polypropylene/poly(butylene terephthalate) (PP/PBT) immiscible polymer blend and the effect of different compatibilizers on the composite properties was evaluated. SEM hints at improved fibre adhesion to the polymer matrix when a PP‐compliant sizing is applied. SEM also reveals improved compatibilization effects when block copolymer instead of multiblock copolymer is used for the PP/PBT blend preparation. The pull‐out test was applied to quantitatively evaluate the interface adhesion between the fibres and matrices. It showed a high value of the interfacial shear strength between basalt fibres modified with PP‐compliant sizing and polymer blend compatibilized by block copolymer, thus confirming good adhesion. One possible explanation of such good mechanical properties can be related to the chemical interactions between functional groups, mainly maleic anhydride on basalt fibres and the polyolefin component (PP) of the polymer matrix. © 2017 Society of Chemical Industry     

增容剂对聚对苯二甲酸丁二酯/ 热塑性聚酰胺弹性体合金热性能和分散形态的影响

８０份聚对苯二甲酸丁二酯（ＰＢＴ）和２０份热塑性聚酰胺弹性体（ＴＰＡＥ）分别与９种含有环氧基（—ＧＭＡ）或无水马来酸酐基（—ＭＡＨ）或酯基的增容剂及它们的复合物进行熔融共混,得到ＰＢＴ／ＴＰＡＥ／增容剂合金。用动态粘弹性温度曲线、ＤＳＣ曲线、扫描电镜观察表明,含—ＧＭＡ或—ＭＡＨ或两者共存的增容剂能使ＰＢＴ与ＴＰＡＥ间的相互作用增强,使ＴＰＡＥ在ＰＢＴ中的分散更加均匀,但对软化温度影响很小。     

相容剂及其在PC/ABS合金中的应用

采用水相悬浮聚合法合成了SAN-g-MAH、SAN-g-MMA、SAN-g-GMA3种相容剂,比较了3种相容剂对PC/ABS合金的增容效果,着重研究了工艺条件对接枝率的影响及相容剂用量对合金力学性能的影响。结果表明,相容剂的最大接枝率可达5.76%,添加相容剂后,PC/ABS合金的力学性能有明显提高,拉伸强度和缺口冲击强度分别可达61.91MPa和10.12kJ/m2。     

KTR-6C对PC/PBT共混体系性能的影响

研究了丙烯酸酯与甲基雨烯酸缩水甘油酯双官能化的乙烯类弹性体KTR-6C对PC／PBT共混体系相容性以及力学性能的影响。结果表明．KTR-6C的加入．改善了PC／PBT之间的相容性，改善了PC／PBT共混体系的加工流动性能和外观。随着KTR-6C用量的增加．PC／PBT的熔体质量流动速率增加；KTR-6C的加入．起到了很好的增韧作用，极大的提高了PC／PBT共混体系的冲击强度．当其用量为7份时达到最大值．为纯PC／PBT的20倍。     

Valorization of poly(butylene terephthalate) wastes by blending with virgin polypropylene: Effect of the composition and the compatibilization

Blends of recycled poly(butylene terephthalate) (PBT) parts obtained from scrapped cars, and virgin polypropylene (PP), were prepared in a twin‐screw extruder at different compositions. Selected compositions were also prepared with the presence of ethylene‐co‐glycidyl methacrylate copolymer (E‐GMA) and ethylene/methyl acrylate/glycidyl methacrylate terpolymer (E‐MA‐GMA) compatibilizers. The effect of the composition and the type of compatibilizer, as well as the mixing conditions, on the morphology phase, thermal, viscoelastic behavior, and mechanical properties of the blends has been investigated. Blends PP/PBT of various composition exhibit a coarse morphology and a poor adherence between both phases, resulting in the decrease of ductility, whereas at weak deformation, PBT reinforced the tensile properties of PP. Addition of E‐GMA and E‐MA‐GMA to the PP/PBT blend exhibited a significant change in morphology and improved ductility because of interfacial reactions between PBT end chains and epoxy groups of GMA that generate EG‐g‐PBT copolymer. Moreover, thermal and viscoelastic study indicated that the miscibility of PP and PBT has been improved further and the reactions were identified. The E‐MA‐GMA results in the best improvement of ductility. POLYM. ENG. SCI., 2008. © 2008 Society of Plastics Engineers