EPDM／CSM并用技术的探讨

EPDM/CSM(95/5)的并用体系与单纯EPDM相比较,改善了胶料的流变性能,提高了交联速度和硫化胶的拉伸强度,并降低了生产成本,产品性能满足GB 12528—90标准规定。     

氯醚橡胶/NBR并用胶的性能研究

研究了不同并用比的氯醚橡胶（ECO）与NBR-26,NBR-33和NBR-41并用胶的力学性能、耐老化性能和耐油性能。结果表明,NBR-26,NBR-33和NBR-41的用量在10～40份的范围内,对胶料的拉伸强度和扯断伸长率的影响不大;随着NBR-26的用量增大,硫化胶在油中的体积变化率增大,而且在100℃油中的体积变化率尤为明显,随着NBR-23的用量增大,硫化胶在100℃油中的体积变化率呈上升的趋势;随着NBR-41的用量增大,硫化胶在100℃油中的体积变化率明显下降。     

ECO/NBR共混胶的性能

考察二元共聚氯醚橡胶(ECO)与不同丙烯腈质量分数的NBR共混胶的物理性能、耐老化性能及耐油性能。结果表明，共混胶的物理性能提高，ECO／NBR-4l共混胶的耐热老化性能优于ECO／NBR-35和ECO／NBR-26共混胶．NBR-4l的耐油性能最好。共混比为60／40的ECO／NBR-4l共混物具有优异的耐油性能，玻璃化温度范围为-46～-43℃，可满足耐寒制品的使用要求。     

配方因素对NBR/CSM并用胶物理性能的影响

研究NBR／氯磺化聚乙烯（CSM）并用比、硫黄用量、炭黑品种与用量、增塑剂及防老剂品种对NBR／CSM并用胶物理性能的影响。NBR／CSM并用胶优化配方为：NBR40，CSM60，炭黑N55055，氧化锌2．5，硬脂酸1，氯化石蜡10，防老剂MB1，硫黄1，促进剂TMTD0．5，促进剂CZ0．9。该配方并用胶的综合物理性能良好。     

共混比对CM／XNBR并用胶性能的影响

研究了不同共混比对氯化聚乙烯橡胶（CM）／羧基丁腈橡胶（XNBR）并用胶在热空气老化前后的力学性能、耐油性的影响。结果表明,随着XNBR用量的增加,焦烧时间缩短,硫化速度加快,拉断伸长率、拉伸强度先减小后增加;100％定伸应力出现极大值;拉伸永久变形、撕裂强度、体积磨耗量和高温下浸油前后的体积和质量变化率均按一定规律减小;常温下体积和质量变化率均很小;硬度明显提高且基本稳定;热空气老化后,拉断伸长率整体下降,拉伸强度,100％定伸应力和撕裂强度均有明显提升,DIN磨耗量除CM纯胶有明显降低外,其他配比的磨耗体积基本维持不变;热油老化后,伸长率、拉伸强度、100％定伸应力均有所下降。     

NBR／EPVC共混胶硫化特性和耐油性能的研究

以NBR／EPVC共混比、DOP用量和DCP用量为变量,研究了NBR／EPVC共混胶的硫化特性（最小转矩和最大转矩）和耐油性能（耐油质量变化率和体积变化率）。结果表明,随EPVC用量的增加,共混胶硫化特性变差．硫化速度减慢,耐油性能下降;随DOP用量的增加,共混胶硫化性能变差．硫化速度变化不大,耐油性能先提高后下降;随DCP用量的增加,共混胶硫化性能改善,硫化速度加快,耐油性能下降。     

PVC/NBR共混物的耐油性研究

考察了PVC树脂聚合度、NBR用量及混料时加料顺序对PVC/NBR共混物耐油性的影响。结果表明:使用高聚合度PVC树脂和NBR P83可明显改善共混物的耐油性。试验初步确定PVC/NBR输油管实验配方为:PVC(S-2500)100份,稳定剂1份,DOP 100份,NBR P83 20份,润滑剂0.5份。     

助硫化剂对过氧化物共硫化NBR／CM的影响

研究了不同助硫化剂对过氧化物共硫化NBR／CM的影响。实验结果表明,助硫化剂S、PDM和Zn（MMA）。均能有效地提高共混物的拉伸强度和撕裂强度;助硫化剂S和TCY均能降低共混物的DIN磨耗体积。     

不同添加剂对自硫化CSM/XNBR共混物性能的影响

在没有任何硫化剂的条件下,氯磺化聚乙烯（ＣＳＭ）和羧基丁腈橡胶（ＸＮＢＲ）的共混物（质量比１∶１）能在１８５℃×６０ｍｉｎ下模压硫化。溶胀分析、凝胶测定、硫化曲线及红外谱图分析证实了ＣＳＭ中的氯磺酰基和ＸＮＢＲ中的羧基之间发生了交联反应。共混体系能用５０份炭黑增强,３０份氯化石蜡增塑。加入ＣＳＭ的稳定剂增加了共混硫化胶的凝胶质量分数。碱性物质能大幅度提高自硫化ＣＳＭ／ＸＮＢＲ共混物的强度。共混物的耐热氧老化性能尚待提高。     

EPDM橡胶耐热性能的研究

通过对三元乙丙橡胶（EPDM）硫化体系、补强体系、填充体系和增塑体系的选择,研究了其对EPDM胶料耐热性能的影响。结果表明,采用有效硫化体系（EV）时,添加不超过40份的丁基橡胶（IIR）和20份的白炭黑能有效改善胶料在高温下的力学性能。     

Influence of precipitated silica on dynamic mechanical properties and resistance to oil and thermal aging in CPE/NR blends

Blends of 80/20 CPE/NR filled with various silica loadings were prepared, and their properties were determined. It was found that cure properties are influenced significantly by the addition of precipitated silica. Scorch time and cure time decrease with increasing silica loading, which could be explained by the thermal history attributed to the shear heating in the blending stage. An increase in crosslink density as a function of silica loading is believed to be caused by a migration of curatives to the NR phase. In terms of phase morphology, with increasing silica loading, the NR dispersed phase size decreases due to the increase in compound viscosity and, thus, the shear stress available for efficient blending. An increase in silica loading also enhances resistance to oil due to the decrease in the NR dispersed phase size associated with the dilution effect, but gives no significant impact on thermal aging resistance. According to the change in damping peak height associated with the shift in T_g of the CPE phase, silica appears to preferentially migrate to the CPE phase due to the strong interaction between CPE and silanol groups of the silica surfaces. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 96: 2218–2224, 2005     

填料对ECO/NBR共混胶料性能的影响

研究了不同种类及用量的填料对ECO/NBR共混胶硫化特性、力学性能、耐老化性能、高温耐油性能的影响，结果发现综合考虑如上性能配方中最合适的补强剂是N539，用量以70份为最佳。     

A study on the compatibility and physical properties of chlorinated polyethylene rubber/nitrile rubber blends

The miscibility and some physicomechanical characteristics of chlorinated polyethylene rubber (CPE) and nitrile rubber (NBR) blends have been investigated. Calculation of the heat of mixing, differential scanning calorimetry, and scanning electron microscopy analysis showed that CPE was miscible with NBR in all proportions. The cure and scorch times decreased with the increase in NBR content, whereas the maximum torque increased. The tensile strength, 100% modulus, elongation at break, tear strength, and compression set decreased with increasing of NBR content. After aging, hardness and tensile strength increased, and there was no drastic change in elongation at break on aging. The thermal aging resistance and the abrasion resistance of NBR are improved after blending with CPE, but the oil resistance decreased. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011     

氯化聚乙烯对三元乙丙橡胶与丁腈橡胶并用胶物理机械性能的影响

研究了氯化聚乙烯对EPDM／NBR并用胶物理机械性能的影响。结果发现，加入氯化聚乙烯后，并用胶的混合平衡扭矩降低，达到平衡扭矩所需的时间缩短，且无论用硫黄硫化还是用过氧化物硫化，硫化胶的物理机械性能都提高，表明氯化聚乙烯对EPDM／NBR并用胶有一定的增容作用。同时也发现用过氧化物硫化的EPDM／NBR并用胶物理机械性能优于硫黄硫化的并用胶物理机械性能。     

NR/PVC/NBR共混物的耐油性能研究

研究用NBR改善NR/PVC共混物的耐油性能 ,通过测试所设计的各配方共混物的拉伸强度、扯断伸长率、硬度、耐磨性和耐油性等性能 ,得出NBR改性NR/PVC共混体系的最佳配比关系。最佳配方为 :PVC　 30 ;NR　10 0 ;NBR　 2 5 ;硫黄　 3;促进剂TMTD　 0 8;促进剂D　 1 5 ;促进剂DM　 1 5 ;白炭黑　 40 ;轻质碳酸钙　 30 ;氧化锌　 5 ;硬脂酸　 1 5 ;防老剂D　 2。共混物的耐油性能可达到NBR制品的要求