结晶速率

聚氧化乙烯/碱金属卤化物络合体系对提高PET结晶速率的研究

A Study on Increasing the Crystallization Rate of PET by PEO / Alkali Metal halide Complex System

PET的主要缺点是结晶速率慢、冲击强度低、耐磨性差。

The disadvantages of PET include its low crystallization rate , low impact strength and poor abrasion resistance .

复合材料的结晶速率常数比纯PP大；

The composite exhibits a larger crystallization rate constant and a smaller Avrami exponent compared with pure PP.

用多种方法对两个结晶速率不同的PET样品在拉伸过程中的结晶和取向进行了研究。

Crystallization and orientation of PET films of different crystallization rates have been studied doing various techniques during stretching .

含一种刚性一种柔性组分的共聚酯随刚性组分含量的增加，结晶速率G下降。

For copolyester containing a rigid component and a flexible one , crystallization rate G decreases with increasing the content of rigid component .

在PLA中添加成核剂可有效提高其结晶速率，改善其耐温性能。

The addition of nucleating agent is quite effective in enhancing the crystallization of PLA .

在高温下，SB与PEN发生化学反应，生成可以起到成核作用的物质，降低了PEN的成核表面自由能位垒，提高了PEN在高温区的结晶速率。

It can decrease the surface free energy barrier toward nucleation and accelerate the crystallization rate of PEN at high temperature .

在最大结晶速率温度135℃处，超声波对PP热性能的影响作用效果最佳。

The optimal effect on the thermal property of PP was at the temperature of 135 ℃ of the maximum rate of the crystallization .

研究发现，当添加10%分子量为4000的PEG时，复合材料的结晶速率快速提高。

Furthermore , PEG ( 4000 ) with the mass fraction of10 % can promote the crystallization rate of the composites .

高温部分结晶速率常数变慢与取向PET纤维的完全无定形部分重量减少有关。

The decrease of rate constant of crystallization in the higher temperatures is related to the less amount of the amorphous portion in the oriented PET fibers .

当SiO2的含量为3%时，结晶速率常数增大。

When the content of SiO_2 reached to 3 % , the constant of crystalline rate was increased .

而对薄膜晶化时间的分析则表明，Si掺杂会略微降低GST薄膜的结晶速率。

However , the crystallization rate of GST was found to be slightly slowed by Si doping through the analysis of crystallization time . 4 .

TPP对PET结晶速率影响的特点表明它不是PET的成核剂，而是一个增塑剂。

The characteristics of the effect of TPP on the crystallization of PET indicate that TPP is a plasticizer of PET , but not a nucleating agent .

对不同取代基的苯甲酸钠盐，其相应的酸解离常数和溶度参数与PET的结晶速率有一定的内在联系。

In the case of the sodium benzoates with different substituted groups , the crystallization rate of PET is related to the dissociation constant and solubility parameter of the substituted benzoates .

差示扫描量热分析（DSC）研究表明，交联使体系中PP相和PE相的结晶速率都下降。

The result of thermal analysis by differential scanning calorimetry ( DSC ) indicated that crosslinking decreased both of the crystal rate of PP and PE in the system .

用等转化率法适用于解析结晶速率常数K，结晶活化能Ed，成核参数ψ等参数，但不适用于求解线生长速率G。

The iso-conversional method was suitable to analyze at the crystallization rate constant K , the activation energy of crystallizing Ed , the nucleation parameter ψ, and was unsuitable to analyze the liner growth rate G.

结果表明加入MMT后提高了PP的结晶速率，使结晶度增大，但对PP熔点的影响不大；

The result indicated that both the crystallization rate and crystallinity of PP were increased by the addition of MMT , but the melting point of PP changed little ;

结果表明，由于成核添加剂与PET之间在熔融态下存在化学反应，导致PET有不同程度的分子量下降，同时PET结晶速率发生变化。

It is found that there are chemical reactions between nucleating additives and PET in the melt state , resulting in the change of molecular weight and crystallization rate of PET in some degree .

结果表明，与常规聚酯（PET）相比，磷系阻燃共聚酯切片的结晶速率较低，结晶时间更长，热稳定性能更好，熔体粘度对温度更加敏感。

Result indicated that comparing with conventional PET , phosphorus series inflaming retarding copolyesters slices had lower crystallizing rate , longer crystallizing time , better thermal stability , and the melt viscosity was more sensitive to temperature .

然而，PLLA较低的韧性、缓慢的结晶速率和降解速率限制了它的发展和广泛实际应用。

However , the low toughness , slow crystallization rate and slow degradation rate of PLLA have limited its development and wide practical application .

采用原位聚合复合法制备无机超微颗粒（SiO2，TiO2，蒙脱土）/PET复合材料，首先考察了不同无机粒子对PET结晶速率的影响，结果表明：蒙脱土/PET复合材料（NPET）结晶速率最快；

An in-situ polymerization composition approach was applied to prepare inorganic particles ( SiO 2 , TiO 2 , montmorrilonite ) / PET composites . Influences of various particles on crystallization rate were observed .

结果表明：纳米TiO2对MC尼龙6基体具有异相成核作用，使其原位纳米复合材料结晶速率常数变大，半结晶时间变小。

The result showed that nano-meter TiO_2 particles had heterogeneous nucleating effect on MC nylon 6 , thus enhanced the crystallization rate of MC nylon 6 and reduced the half time of crystallization .

采用结合Avrami方程和Ozawa方程的处理方法，得到了3种聚酯的结晶速率的大小关系：PBT>PTT>PET。

Their crystallization rate was analyzed by using Avrami and Ozawa equations and concluded as PBT > PTT > PET .

结果表明：纳米TiO2对铸型PA6起到异相成核的作用，提高了铸型PA6的结晶速率和结晶峰温，缩短了半结晶时间。

The results show that nano - TiO2 can play a role of heterogeneous nucleating agent in polyamide 6 , improve the crystallization rate and reduce the half time of crystallization .

用光学退偏振法和DSC方法研究了聚合过程的助剂磷酸三苯酯（TPP）对聚对苯二甲酸乙二酯（PET）结晶速率的影响。

The influence of a polycondensation additive , triphenyl phosphate , on , the overall crystallization rate of PET has been studied by means of depolarized light intensity method and differential scanning calorimetry .

有机蒙脱土复合母粒能有效促进PP异相成核，提高PP的结晶速率和结晶温度，但对结晶速率常数影响不大。

The results also show that organic montmorillonite master batches can effectively accelerate the heterogeneous nucleation of polypropylene and increase its rate of crystallization and crystallizing point , but they do not affect the rate constant of crystallization .

实际上，聚对苯二甲酸乙二醇酯（PET），由于存在结晶速率慢、制品收缩率大、制品尺寸稳定性差等缺点，在作为注塑工程塑料的应用上也受到很大的限制。

As a matter of fact , virgin poly ( ethylene terephthalate )( PET ) is also limited to apply as an engineering plastic for injection moulding due to its low crystallization rate , long crystallization period and inferior dimensional stability .

然而，PLA的结晶速率低，在实际成型加工得到的制品通常是非晶的，限制了其在具有耐热性要求领域的应用。

However , one of the main features of PLA is intrinsic slow crystallization rate , resulting in amorphous state under practical processing , which limits its wider applications in the fields where thermal stability is required .

硫化过程中In2S3比FeS2有更高的结晶速率。

The propagation rate of In_2S_3 crystallites is higher than that of FeS_2 crystallites during sulfidation annealing .

而对于低HV含量PHBV/PCL共混体系，随降温速率的增大，PHBV组分的非等温结晶速率常数Zc增加。

As for the low HV content of PHBV / PCL blends , with the cooling rate increasing , the non-isothermal crystallization rate constant Zc of PHBV component increased .