VC-BA树脂替代ACR对PVC性能的影响

研究了VC—BA树脂（即氯乙烯一丙烯酸丁酯共聚树脂）与ACR对PVC干混料的加工性能、试样的力学性能的影响。结果表明：VC—BA树脂与PVC相容性良好。它的加入促进了PVC体系的熔融,改善了干混料的塑化性能,提高了试样的力学性能,可以替代ACR,是性能良好的PVC改性剂。     

绿色建材专用PVC树脂R—1000的特性及其加工和应用

本简述了R-1000树脂的合成，并从树脂的质量指标，颗粒特性，加工性能，VC脱吸速率及VC残留等方面对R-1000产品与国外同类样品进行分析对比，分析结果表明R-1000树脂的性能已达到国际水平，充分体现出其用于挤出成型硬制品的优势，经市场加工应用，本公司开发的R-1000树脂受到一些用户欢迎和认可。     

CPE—g—VC接枝共聚树脂性能与加工应用研究

本文测试了CPE—g—VC接枝共聚树脂的基本性能,用与PVC共混的方法,研究了CPE—g—VC作为PVC改性剂的力学性能及加工条件的关系,考察了CPE—g—VC共混物的转矩流变行为、毛细管流变行为和可挤出性。结果表明:CPE—g—VC具有许多优良特性。在PVC共混物中,CPE—g—VC较CPE有更好的增韧效果,CPE—g—VC/PVC共混物具有较CPE/PVC共混物高3～4倍左右,较纯PVC高5～8倍左右的抗冲击强度。同CPE/PVC共混物相似,CPE—g—VC/PVC共混物加工区域较狭窄。     

S-1000A新型PVC专用树脂

齐鲁石化股份有限公司树脂研究所开发的PVC树脂S-1000A新产品通过集团公司鉴定。该专用树脂具有适宜的聚合度和良好的颗粒形态，塑化时间短，流动性能好，加工性能优良，达到国外同类产品的先进水平。通过工艺稳定性调整，跟踪检测数据显示，性能完全达到预期要求。该专用树脂在型材和管材应用中有明显的优势，很好地满足了引进高速型材、管材加工设备的技术要求，生产的型材和管材完全满足相关国家标准的指标要求。     

R—1000绿色建材树脂的推广应用

本从聚氯乙烯加工的角度分析研究了R-1000PVC建材树脂与国内外同类产品在常规指标，颗粒形态和塑化性能上的差异及对加工性能的影响：同时研究了R-1000PV建材树脂在型材，管材上的应用优势。实验结果表明：应用R-1000PVC建材树脂可提高挤出设备的生产效率。在一定程度上也可提高制品的质量。     

ACR-g-VC共聚抗冲制品专用树脂研究进展

叙述了PVC树脂的增韧机理，归纳了PVC制品的增韧方式，对冲击改性剂ACR的合成过程及结构性能表征方法进行了详述，并研究了ACR—g—VC接枝共聚树脂的制备要点，简要介绍了接枝共聚树脂性能的评价手段。     

PVC混合料加工性能的研究

介绍了国内外PVC混合料的概况，从增韧改性的机理，加工流变理论及颗粒结构等方面论证了影响PVC混合料加工性能的各种因素。并通过实验分析数据来比较沧井化工树脂产品与国外大型企业同类产品在加工性能上的差距，结果表明国产沧井化工树脂的加工性能完全可与国外大型企业同类产品相媲美。     

ACR—g—VC接枝共聚高抗冲树脂研究进展

本文叙述了PVC树脂的增韧机理，归纳了PVC制品的增韧方式，对抗冲改性剂ACR的合成过程及结构性能表征方法进行了详速，并研究了ACR—g—VC接枝共聚树脂的制造要点，最后简要介绍了接枝共聚树脂性能的评价手段。     

CPE—g—VC接枝共聚树脂加工应用研究

本文用与PVC共混的方法,研究了CPE—g—VC作为PVC改性剂的力学性能及加工条件的关系,考察了CPE—g—VC共混物的转矩流变行为、毛细管流变行为和可加工性。结果表明:CPE—g—VC树脂具有许多优良特性,例如具有较高抗冲击强度、良好耐低温性、耐老化性、热稳定性、耐燃性等。在PVC共混物中,CPE—g—VC较CPE有更好的增韧效果,CPE—g—VC/PVC共混物具有较CPE/PVC共混物高3～4倍左右,较纯PVC高5～8倍左右的抗冲击强度。同CPE/PVC共混物相似,CPE—g—VC/PVC共混物加工区域较狭窄。     

符合国际标准的PVC耐压管材的开发

为了开发满足ISO 1452:2009要求的PVC耐压管材,以S-1000型PVC树脂为基础,研究了冲击改性剂、润滑剂以及稳定剂对管材性能的影响,并进行了工业化加工试验。试验得出的PVC耐压管材配方为S-1000,100份;有机锡稳定剂,0.7份; MBS,1.5份;硬脂酸钙,0.5份;加工改性剂,1.5份;碳酸钙,5份;石蜡,0.4份;PE蜡,0.4份;着色剂,适量。工业化加工试验表明:由于不同厂家的挤出设备、加工工艺不同,所生产的PVC管材的性能有较大差异。只有采用合适的挤出设备及加工工艺才能生产出符合ISO 1452:2009要求的PVC耐压管材。     

Vinyl chloride formation from the thermal degradation of poly(vinyl chloride)

The volatile products from the thermal degradation of poly(vinyl chloride) (PVC) resins and compounds are shown to contain trace amounts of vinyl chloride. Data presented show the effect of temperature and resin type on the amount of vinyl chloride formed. At the maximum temperatures involved in PVC processing which may reach 210°C, vinyl chloride monomer (VCM) evolution amounts to less than 1 ppm (resin basis). A technique employing a thermogravimetric balance and charcoal adsorption of volatiles is described for studying thermal degradation of PVC. The volatiles are analyzed for vinyl chloride by gas chromatography. Peak identity was confirmed by mass spectrometry.     

Vinyl chloride formation from the thermal degradation of poly(vinyl chloride)

The volatile products from the thermal degradation of poly(vinyl chloride) (PVC) resins and compounds are shown to contain trace amounts of vinyl chloride. Data presented show the effect of temperature and resin type on the amount of vinyl chloride formed. At the maximum temperatures involved in PVC processing which may reach 210°C., vinyl chloride monomer (VCM) evolution amounts to less than 1 ppm (resin basis). A technique employing a thermogravimetric balance and charcoal adsorption of volatiles is described for studying thermal degradation of PVC. The volatiles are analyzed for vinyl chloride by gas chromatography. Peak identity was confirmed by mass spectrometry.     

氯乙烯/丙烯酸酯二元及多元共聚物的研究进展

介绍了氯乙烯/丙烯酸酯多元共聚物、聚氯乙烯树脂/丙烯酸酯/顺丁烯二酰亚胺接枝共聚物、聚氯乙烯树脂/N-取代马来酸胺/丙烯酸酯接枝共聚树脂、氯乙烯/乙酸乙烯/丙烯酸羟丙酯共聚物、氯乙烯/乙酸乙烯/丙烯酸丁酯共聚乳液、聚丙烯酸酯-氯乙烯接枝共聚物、氯乙烯/乙烯/丙烯酸羟乙酯共聚涂料树脂、氯乙烯/丙烯酸甲酯共聚乳液的特点、生产工艺及其性能和用途.     

ACR-g-VC/纳米水滑石复合材料的形态及性能

采用原位悬浮聚合制备了丙烯酸酯共聚物(ACR)接枝氯乙烯(VC)(ACR-g-VC)树脂和ACR-g-VC/纳米水滑石复合材料,并研究了复合材料的形态、加工塑化性能、力学和热性能。采用原位聚合/熔融加工得到的ACR-g-VC/纳米水滑石复合材料中,纳米水滑石基本以初级粒子形式存在,分散性明显优于由ACR-g-VC与纳米水滑石直接熔融共混制备的复合材料。水滑石含量对原位聚合/熔融加工得到的ACR-g-VC/纳米水滑石复合材料的简支梁缺口冲击强度和储能模量影响较小,而ACR-g-VC的热稳定和加工塑化性能随纳米水滑石的引入而提高。水滑石质量分数为2%的复合材料质量损失10%的温度比聚氯乙烯提高近20℃,而塑化时间缩短至22 s。     

全球PVC专利技术新进展(待续)

介绍了国内外有关PVC生产、加工、应用方面的专利新技术,包括乙烷氯化制氯乙烯、PVC糊树脂汽提、氯乙烯本体聚合、CPVC生产、聚合用分散剂、无害化增塑剂及废塑料回收等。     

全球PVC专利技术新进展(待续)

介绍了国内外有关PVC生产、加工、应用方面的专利新技术,包括乙烷氯化制氯乙烯、PVC糊树脂汽提、氯乙烯本体聚合、CPVC生产、聚合用分散剂、无害化增塑剂及废塑料回收等。     

全球PVC专利技术新进展(续完)

介绍了国内外有关PVC生产、加工、应用方面的专利新技术,包括乙烷氯化制氯乙烯、PVC糊树脂汽提、氯乙烯本体聚合、CPVC生产、聚合用分散剂、无害化增塑剂及废塑料回收等。     

Residual vinyl chloride levels in U.S. PVC resins and products: Historical perspective and update

The vinyl industry made dramatic changes in the production of poly(vinyl chloride) (PVC) resin in the 1970s to comply with regulations governing workplace exposure and environmental emissions of vinyl chloride monomer (VC or VCM), after it was recognized that vinyl chloride was a human carcinogen. These changes required extensive and costly modifications to the monomer and polymer production processes and the development of resin formulations from which residual monomer could be removed more easily from the polymerized matrix. Reductions of vinyl chloride emissions from PVC production facilities continued over the past two decades, driven both by voluntary initiatives to optimize the manufacturing process and by regulatory requirements, such as state operating permit limits related to incremental production expansion or modification at existing facilities. Surveys of recent resin data, reviews of pipe product certification reports, and recent food package testing by the U.S. Food and Drug Administration (FDA) show that current residual vinyl chloride monomer (RVCM) levels in all grades of PVC resin typically are significantly below acceptable levels and that resulting fabricated products are typically at nondetect levels to very low parts‐per‐billion (ppb) levels. J. VINYL. ADDIT. TECHNOL., 11:65–69, 2005. © 2005 Society of Plastics Engineers     

PVC — origin,growth, and future

Application of poly(vinyl chloride) (PVC) was first described in a patent in 1913, but only after 1930 did a sustained interest in PVC arise in a number of industrial laboratories. Nowadays PVC is the second thermoplastic resin behind polyolefins with a worldwide capacity of ca. 31 million tons. In its nearly 70 year history, PVC has contributed to much progress in polymer science and technology, e. g., to emulsion and suspension polymerization, detailed analysis of polymer structure, chemistry of stabilization, plasticization, chemical modification, and plastics processing. But PVC also plays an important role in many environmental discussions on polymers, e. g. chlorine chemistry, toxicity of vinyl chloride, or waste and recycling problems. Within the time frame of 70 years, some recent developments in controlled polymerization of vinyl chloride, stabilization, modification of bulk properties and chemical and material recycling of PVC are discussed.     

直接挤出成型加工用硬质聚氯乙烯专用树脂

在2、10和70L聚合釜中对氯乙烯悬浮聚合工艺与树脂颗料形态的关系进行了研究,对添加的助剂进行了筛选和匹配,确定了静态混合接枝聚合技术及两段悬浮聚合工艺。指出：该 用树脂生产技术特点是将PVC加工中所需的各种助剂在聚合期间全部加到聚合釜中,且非常均匀地散到PVC颗粒内部发挥相应的作用,树脂颗粒形态规整,吸油率适中,干流性好,易于加工成型;同时能有效地改善生产环境,是挤出成型加工硬质制品的理想专用树脂,对PVC工业的发展具有重要意义。