木粉处理对PVC／木粉填充体系性能的影响

选用热塑性塑料PVC和100目木粉填料为原料，研究了木粉的不同处理方法对填充体系力学性能的影响。研究结果表明，采用处理剂A、B、C、D处理木粉可明显提高填充体系的拉伸强度，但材料冲击强度却稍有降低；四种处理剂处理效果相比较，处理剂B的效果相对好些；采用NaOH预处理后再进行处理剂处理，可明显提高填充体系的相容性，使材料的力学性能有所提高。     

PVC/木粉复合材料挤出发泡成型的研究

介绍木塑复合材料挤出发泡成型的发展和加工难点,针对聚氯乙烯(PVC)／木粉复合材料挤出发泡的成型方法,从原料、配方、工艺、设备等方面作了详细分析。简述了PVC／木粉复合材料挤出发泡制品的性能及影响制品性能的主要因素。     

木粉对PVC木塑复合材料力学性能影响

采用电镜扫描观察了3种木粉的纤维细胞尺寸及其木粉微观形态。研究了木粉粒度、微观特性以及木粉添加量对了聚氯乙烯（PVC）木塑复合材料力学性能的影响。结果表明，木粉表面裸露的微细纤维增加和粒度减小，有助于提高木塑复合材料力学强度；加入少量木粉使木塑复合材料力学性能降低，但随着木粉添加量的增大，木塑复合材料的抗弯性能和拉伸强度上升；木塑复合材料的冲击强度随木粉含量增加而下降。     

PVC/木粉发泡复合材料的性能影响因素分析

PVC（PW）/木粉复合材料的研制？生产和应用对于寻求实体木材的替代品和利用木材加工残余物具有重要意义,也是塑料回收再生利用的有效途径之一。PVC（PW）/木粉复合材料的优点主要是力学强度高、耐强酸碱腐蚀性强和经济环保。对复合材料的性能影响因素进行了分析,并对PVC/木粉复合材料研究和探索的方向和趋势进行概述。     

微发泡硬质PVC/木粉体系型材的挤出

以植物纤维机制木粉取代通常的矿物填料，成功地制得了微发泡硬质PVC／木质体系的塑料型材，分析和讨论了型材的结构特点、工艺要点以及聚合物和木粉的界面改性。     

木粉填充聚乙烯复合材料的研究

采用木粉对聚乙烯(PE)进行改性，研究了树脂牌号、引发剂、接枝单体对相容剂性能的影响以及木粉的粒径、水含量及相容剂用量等因素对聚乙烯／木粉复合材料性能的影响，通过SEM(扫描电镜)对材料结构进行了表征。结果表明：复合材料的弯曲性能随木粉用量的增加而大幅度提高，耐热性能也有明显改善，而冲击性能则迅速下降；木粉的粒径对复合材料弯曲性能的改善不大，木粉水含量对复合材料的弯曲性能则有较大影响；相容剂用量在10％以上，可提高复合材料的弯曲性能，对冲击性能影响不大。     

硬质聚氯乙烯低发泡板材填充改性研究

着重讨论了填充剂用量对硬质聚氯乙烯低发泡板材加工性能、力学性能与生产成本的影响。小试和生产实践表明,填充剂的用量增加,不仅使板材的成本明显下降,其他性能,尤其是使用性能得到较大改善。另外,还介绍了生产中的一些细节问题,并根据板材的不同用途,针对改性的不同需要,提出了相应的解决办法。     

木粉填充PP的力学性能

用松木粉／杉木粉对聚丙烯填充改性的实验研究对象,探讨了木粉的种类,表面处理和填充量对ＰＰ力学性能的影响。     

木粉填充HDPE的力学性能

以木粉对ＨＤＰＥ填充改性为实验研究对象,初步探讨了表面处理和填充量对木粉填充改性ＨＤＰＥ力学性能的影响。     

聚酯短纤维填充聚氯乙烯材料性能的研究

本文主要研究了聚酯短纤维填充聚氯乙烯的性能,探讨了不同含量、不同长度的聚酯短纤维和ＣａＣＯ３对复合材料力学性能的影响。     

木粉特性对PVC／木塑发泡材料性能的影响

对木粉进行了热重分析,考察了木粉粒径及表面处理方法对PVC／木塑发泡材料性能的影响。结果表明：采用粒径117μm（120目）、经过硅烷类偶联剂处理的木粉制得的PVC／木塑发泡材料的综合性能较优;相同发泡剂用量下,PVC／木塑发泡材料密度随木粉用量的增加而增大,发泡效果变差。     

高木粉填充量PVC基复合材料性能的研究

研究了CPE和POE-g-MAH的用量对高木粉填充量(100份)PVC基复合材料的力学性能、耐水性、密度和加工流动性的影响。结果表明:CPE能有效提高复合材料的冲击强度和拉伸强度,减小密度,改善耐水性和加工流动性;POE-g-MAH能显著提高复合材料的冲击强度和拉伸强度,改善耐水性。经SEM观察分析,CPE与POE-g-MAH二者共同作用增大了木粉与PVC树脂的相容性。     

物理发泡型PVC泡沫的研究

探讨了PVC浆料黏度、混合器搅拌速度对PVC开孔泡沫发泡成型行为的影响,结果表明:PVC浆料黏度控制在0.265 Pa·s以上、混合器搅拌速度控制在1250 r/min为宜.     

Evaluation and optimization of the mechanical properties of highly filled PVC/(wood flour) composites by using experimental design

In this study, PVC/(wood flour) (WF) composites were prepared by using a counterrotating twin‐screw extruder, and the effects on the mechanical properties of concentration and particle size of the WF, type and amount of coupling agent, K value of PVC, feed rate of extruder, and die temperature were investigated. Optimization of various formulation parameters based on the Taguchi method demonstrated that the wood content and wood particle size were the most important parameters. Flexural modulus increased upon increasing WF loading up to 50 wt%. Also, flexural strength and modulus increased with particle size because of the higher aspect ratio and better quality of mixing. Use of coupling agents had a minor effect that was attributed to the moderately high polarity of PVC causing relatively good compatibility between WF particles and the PVC matrix. The optimum level of WF calculated by considering the contribution factor was 50 wt%. J. VINYL ADDIT. TECHNOL., 2011. © 2011 Society of Plastics Engineers     

中空玻璃微珠填充聚氨酯发泡材料的吸声性能与动态力学性能研究

以聚氨酯（PU）为基体、磷酸三甲酚酯（TCP）为增塑剂、中空玻璃微珠（HGB）和偶氮二甲酰胺（AC发泡剂）为填料,采用熔融共混法制备了软质PU/TCP、PU/TCP/HGB、PU/TCP/HGB/AC材料,研究了增塑剂TCP、填料HGB和AC发泡剂的含量对PU材料的吸声性能和动态力学性能的影响。结果表明,在一定范围内,增塑剂TCP、填料HGB和AC发泡剂的加入显著提升了复合材料的吸声性能,当TCP含量为25 %（质量分数,下同）、HGB含量为10 %、AC含量为2 %时,材料的吸声性能最佳,平均吸声系数达到0.29,且频率为1 714 Hz时吸声系数最大,为0.55;以半峰宽衡量材料的吸声频率宽度,发现在一定范围内增塑剂TCP、填料HGB和AC发泡剂对半峰宽的长度分别有减少、增加的作用,为制备轻质宽频吸声材料提供了实验依据;对PU/TCP、PU/TCP/HGB材料的动态力学性能分析进一步验证了选用25 % TCP和10 % HGB配比对材料整体性能调控的合理性。     

硬质PVC挤出发泡材料的塑化性能研究

采用Haake转矩流变仪测定了挤出发泡PVC混合料的恒温、升温熔融塑化性能，结果表明：随着PVC树脂聚合度增加，塑化时间和加工转矩增加；随着ACR加工助剂用量和分子质量的增加，塑化时间缩短，转矩增加；ACR抗冲改性剂具有类似ACR加工助剂的塑化改良行为；添加填充剂碳酸钙促进PVC熔融塑化；ADC发泡剂可延缓PVC混合料的塑化速率、提高熔体粘度，添加发泡剂NaHCO3将大大延缓混合料的塑化速率。     

Flammability and mechanical properties of wood flour‐filled polypropylene composites

Polypropylene (PP) composites filled with wood flour (WF) were prepared with a twin‐screw extruder and an injection‐molding machine. Three types of ecologically friendly flame retardants (FRs) based on ammonium polyphosphate were used to improve the FR properties of the composites. The flame retardancy of the PP/WF composites was characterized with thermogravimetric analysis (TGA), vertical burn testing (UL94‐V), and limiting oxygen index (LOI) measurements. The TGA data showed that all three types of FRs could enhance the thermal stability of the PP/WF/FR systems at high temperatures and effectively increase the char residue formation. The FRs could effectively reduce the flammability of the PP/WF/FR composites by achieving V‐0 UL94‐V classification. The increased LOI also showed that the flammability of the PP/WF/FR composites was reduced with the addition of FRs. The mechanical property study revealed that, with the incorporation of FRs, the tensile strength and flexural strength were decreased, but the tensile and flexural moduli were increased in all cases. The presence of maleic anhydride grafted polypropylene (MAPP) resulted in an improvement of the filler–matrix bonding between the WF/intumescent FR and PP, and this consequently enhanced the overall mechanical properties of the composites. Morphological studies carried out with scanning electron microscopy revealed clear evidence that the adhesion at the interfacial region was enhanced with the addition of MAPP to the PP/WF/FR composites. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010     

CaCO3填充UPVC的力学性能研究

研究不同种类CaCO3填充UPVC的力学性能。结果表明:硬脂酸包覆的纳米Ca- CO3综合性能优越。     

Effects of paste resins on the foaming properties of PVC plastisols

This article studies the foaming properties of PVC plastisols prepared from six different types of PVC paste resins with different degrees of polymerization that were produced through two methods, a seed emulsion method and a micro-suspension method. The underlying mechanisms that result in differences in the foaming properties are discussed as well. The results indicate that formulation S5 has the best foaming quality using past resins produced with the seed emulsion method, and formulation S6 made the best plastisol samples from paste resins produced through the micro-suspension method. Seed emulsion-produced paste resins with low degrees of polymerization are more suitable for preparing high-quality foam materials. The parameters used to judge the foam quality are the initial decomposition temperature T_f (5%), T_f − Tη_max and T_f (5%) − Tη_max. The greater the value of these three parameters, the better the foaming effect. The degree of polymerization of the paste resin and the particle morphology directly affect the rheological parameters, namely Tη_max, of PVC plastisol, and subsequently affect the magnitude of T_f − Tη_max and T_f (5%) − Tη_max, which in turn affect the quality of the foam.