查询词典 pp.

Correctional checking formula of melt flow ratio in injection molding was obtained by introducing a correction coefficient β which reflected the complexity degree of mold cavity. The results show that, the maximum flow ratio of 486 can be obtained when injection pressure ranges from 150 MPa to 160 MPa in Archimedes spiral mold for PP, while maximum flow ratio of 419 can be obtained when injection pressure ranges from 160 MPa to 170 MPa for PE. There is a local fluctuation phenomenon for flow ratio and corresponding injection rate in square spiral mold when injection pressure of 100, 120 and 150 MPa for PP and 130, 140 MPa for PE are reached respectively,and this phenomenon is more serious for good fluidity of melt. The average flow ratio in Archimedes spiral mold is 6% larger than that in square spiral mold for PP, and 4% for PE, the average flow ratio of PP is 19% bigger than PE in Archimedes spiral mold, and 15% in square spiral mold. The influence of the cavity profiles on the melt flow ratio is more significant for good fluidity of melt.

研究结果表明：在阿基米德螺旋线模具中，PP在注射压力为150~160 MPa时取得最大流动比485，PE在注射压力为160~170 MPa时取得最大流动比419；在方形螺旋线模具中，PP在注射压力为100，120和150 MPa，PE在注射压力为130和140 MPa时流动比及所对应的注射速率出现波动，且流动性好的熔体波动更为严重；PP在阿基米德螺旋线模具中的流动比均值较其在方形螺旋线模具中大6%，而PE大4%；在阿基米德螺旋线模具中流动比均值PP比PE的流动比均值大19%，而在方形螺旋线模具中PP的流动比均值比PE的大15%；流动性好的熔体受模具型腔轮廓特征影响大。

Methods: The PP/porous PTFE/PP composite electret film was prepared with porous PTFE,polyethylene and PP by heat melting technique.The charge storage stability of the electret film and transportation were evaluated by using the methods of isothermal surface potential attenuation and open-circuit thermally stimulated discharge current spectra.

利用热融法将多孔PTFE、聚乙烯和PP制备成PP/多孔PTFE/PP复合膜驻极体，利用等效表面电位衰减和开路热刺激放电电流谱方法研究PP/多孔PTFE/PP驻极体的电荷储存稳定性及其输运规律。

Methods: The PP/porous PTFE/PP composite electret film was prepared with porous PTF'E, polyethylene and PP by heat melting technique. The charge storage stability of the electret film and transportation were evaluated by using the methods of isothermal surface potential attenuation and open-circuit thermally stimulated discharge current spectra.

利用热融法将多孔FTFE、聚乙烯和PP制备成PP/多孔PTFE/PP复合膜驻极体，利用等效表面电位衰减和开路热刺激放电电流谱方法研究PP/多孔PTFE/PP驻极体的电荷储存稳定性及其输运规律。

Xuzhou Pierte Pipe System, is an earlier production of PP-R pipeline series of large private enterprises, since its creation has been committed to green fields of engineering research and development, the company adhering to the "pipeline Peart, green passage" of the concept 2001, namely the introduction of German equipment and technology imported raw materials production and sales professional in line with international standards DIN8077, DIN8078 for PP-R pipe, fittings, installation of equipment such as a full set of pipeline products, the company has main products: PP-R pipe fittings, GF PIPING, nano-antibacterial PP-R pipe pipe fittings, PE-RT heating pipe, PVC-U drainage pipes and other series.

苏州皮尔特管业，是国内较早生产PP-R管道系列产品的大型民营企业，自创建以来一直致力于绿色环保工程领域的研究与发展，公司秉承"皮尔特管道，绿色通道"这一理念， 2001年即引进德国进口原料设备及工艺专业生产和销售符合国际标准DIN8077，DIN8078的PP-R管材、管件、安装设备等全套管道产品，公司主要产品有：PP-R管材管件、玻纤增强管材管件、纳米抗菌PP-R管材管件、PE-RT采暖管、PVC-U排水管等系列。

Xuzhou Pierte Pipe System, is an earlier production of PP-R pipeline series of large private enterprises, since its creation has been committed to green fields of engineering research and development, the company adhering to the "pipeline Peart, green passage" of the concept 2001, namely the introduction of German equipment and technology imported raw materials production and sales professional in line with international standards DIN8077, DIN8078 for PP-R pipe, fittings, installation of equipment such as a full set of pipeline products, the company has main products: PP-R pipe fittings, GF PIPING, nano-antibacterial PP-R pipe pipe fittings, PE -RT heating pipe, PVC-U drainage pipes and other series.

不用担心记不住初始密码，该信息已经发往您的邮箱，请注意查收。不用担心记不住初始密码，该信息已经发往您的邮箱，请注意查收。苏州皮尔特管业，是国内较早生产PP-R 管道系列产品的大型民营企业，自创建以来一直致力于绿色环保工程领域的研究与发展，公司秉承"皮尔特管道，绿色通道"这一理念， 2001年即引进德国进口原料设备及工艺专业生产和销售符合国际标准DIN8077，DIN8078的PP-R管材、管件、安装设备等全套管道产品，公司主要产品有：PP-R管材管件、玻纤增强管材管件、纳米抗菌PP-R管材管件、 PE -RT采暖管、PVC-U排水管等系列。

Xuzhou Pierte Pipe System, is an earlier production of PP-R pipeline series of large private enterprises, since its creation has been committed to green fields of engineering research and development, the company adhering to the 'pipeline Peart, green passage' of the concept 2001, namely the introduction of German equipment and technology imported raw materials production and sales professional in line with international standards DIN8077, DIN8078 for PP-R pipe, fittings, installation of equipment such as a full set of pipeline products, the company has main products: PP-R pipe fittings, GF PIPING, nano-antibacterial PP-R pipe pipe fittings, PE-RT heating pipe, PVC-U drainage pipes and other series.

经营模式：经销，代理，特许，合作发展模式：经销，区域代理，区域开发，二级特许苏州皮尔特管业，是国内较早生产PP-R管道系列产品的大型民营企业，自创建以来一直致力于绿色环保工程领域的研究与发展，公司秉承"皮尔特管道，绿色通道"这一理念， 2001年即引进德国进口原料设备及工艺专业生产和销售符合国际标准DIN8077，DIN8078的PP-R管材、管件、安装设备等全套管道产品，公司主要产品有：PP-R管材管件、玻纤增强管材管件、纳米抗菌PP-R管材管件、PE-RT采暖管、PVC-U排水管等系列。

Drawbench plastic production process, because of plastic material contained in the composition of drawing complex, such as PP + renewable PP; PP + inorganic filler; renewable PP + renewable PE and so on; these materials more or less entrainment of water and impurities will directly affect the silk-smooth surface film formation and the tensile toughness of noodle degrees, resulting in mechanical properties of products and sensory quality by a greater impact, broken wires, the membrane surface uneven, dull and so on.

塑料拉丝制品生产过程中，由于塑料拉丝材料所含的成份复杂，如PP＋再生PP；PP＋无机填料；再生PP＋再生PE等等；这些材料多多少少夹带水份和杂质，将直接影响丝面的光滑平整及膜面的韧性拉伸度，从而导致产品的机械性能和感观质量受到较大影响，断丝、膜面凸凹不平、无光泽等现象。

The heterogonous nucleation of nano - CaCO3, PP - g - MA and PP - g - AA increases the crystallization temperature and melting point of PP.

纳米CaCO3和增容剂对PP／PS共混物中PP结晶存在异相成核作用，提高PP结晶温度和熔点，PP—g—MA和PP—g—AA的异相成核作用比CaCO3的大。

The featuresof this method are obtained, i.e. the degradation of PP is not avoided, MAHcan be reacted inside the PP particles by diffusion, grafted polymer has higherpyrolytic degradation temperature than pure PP, the sizes of crystallite ingrafted polymer are smaller than those of pure PP.

在接枝聚合中，选用低能耗、低环境污染的固相法制备PP-g-MAH，探讨了固相法的特点：PP降解不可避免；MAH能渗透进PP粒子进行反应；得到的接枝物具有较高的耐热温度；接枝物的微晶尺寸比纯PP的小。

In this paper, as a typical lewis acid, anhydrous aluminum (AlCl_3) was used as the catalyst to get PP/PS blends compatibilized by in-situ Fridel-Crafts alkylation. The effects on PP and PS components of AlCl_3 were investigated first, mainly by rheology, including steady rheology method and dynamic rheology method. Then the in-situ reactions in PP/PS alloys under different conditions were executed and studied in detail by selective Soxhlet solvent extraction. And at the same time, the evolutions of phase structures of PP/PS and the resulted PP/PS/AlCl_3 alloys were investigated by SEM and SALS. The steady and dynamic rheological behaviors of in-situ compatibilized PP/PS alloys were obtained systematically.

本文选用典型路易斯酸无水氯化铝(AlCl_3)作为催化剂，利用烷基化反应机理，对PP/PS合金直接进行原位催化反应增容，以流变学方法(包括静态流变和动态流变学方法)为主，详细探讨无水AlCl_3对PP/PS合金体系中PP和PS两组分的影响，并在此基础上进一步系统研究无水AlCl_3原位催化增容PP/PS合金的相结构演变及增容反应特征，然后对不同原位催化增容条件下获得增容合金材料的流变行为特征作了深入探讨。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷