And the spherulite growth rate of phbv is studied and the factors , which influence the growth rate and the formula of spherulite growth rate , were discussed 并通过对phbv球晶生长速率的测定,对结。晶生长的速度方程及影响因素做出修正。
2.
On the surface of phbv spherulite , some concentric ring like patterns will occur . based on the procedure of the formation of ring - like patterns , the possible mechanism is given 在球晶的表面出现有同心圆环状条纹,经实验验证为表面的不平整所导致,形成机理主要可能是结晶过程中的体积收缩。
3.
A reasonable mechanism of the concentric ring like patterns on the surface of phbv spherulite was given first . the segregation of hv content between cystal and amorphous parts was observed and the phenomena caused were discussed 首次对phbv球晶表面观察到的同心圆环条纹的成因作了合理解释,揭开了这一现象形成的本质。
4.
The sgr ( spherulite growth rate ) of phbv is related to crystallization temperature . with the increase of temperature , sgr increase first then decrease . some sample ' s sgr will increase again at high temperature area Phbv的球晶生长速度与时间无关,随温度的升高有先上升后下降的趋势,部分样品在最后球晶速度会再次上升。
5.
The results of linear regression indicate that the addition of pam do not alter the avrami exponents , about 2 - 3 , which suggests that the crystallization modes might be a mixture of three - dimensional spherulite and two - dimensional circular Avrami方程线性回归结果表明聚甲亚胺的加入对体系的avrami指数n影响不大, n值约在2 3之间。
6.
The analysis of ir spectrum and melt flow index showed that the composite had a micro - crosslinking structure , and the analysis of dsc discovered there was - spherulite in the aggregate structure of the composite of pp 红外光谱分析和熔体质量流动速率的测定表明,复合材料体系产生了微交联; dsc分析发现, pp材料的聚集态结构中含有球晶。
7.
The polymerization kinetics of pam , the feeding pattern of the initiator naoh and a method used to characterize the spherulite morphology of monomer casting nylon were investigated . the mechanics of inhibition of pam to the polymerization of nylon was certificated by means of a series of experiments 通过两个体系的pam pa - 6复合材料的力学性能、 sem 、 xrd 、 dsc和tem等测试方法研究复合材料的结构与性能间关系,表明聚甲亚胺端基对复合材料性能有一定的影响。
8.
The results from x - ray diffraction demonstrated that pp / mmtome was a fully intercalated nanocomposite , pp / mmtom and pp / ommt were partly intercalated nanocomposites , but the intercalation effect of pp / mmtom nanocomposite was better ; the crystallization characteristics of pure pp and pp / mmt nanocomposites were investigated by dsc , waxd and pom . the result of these testing showed that mmt nano - layers acted as nucleating agents for the crystallization of pp , the addition of mmt had effect on the crystallization process , leading the increasing of crystallization temperature crystallization rate and crystallinity , but also the dimension of spherulite reduced . but the formation of pp crystal did n ' t change , the formation of pp crystal in three pp / mmt nanocomposites and pure pp were a - form on the whole ; influences of three sorts of mmt on mechanical properties of pp / mmt nanocomposites were studied , as a result , the addition of mmt comprehensively improved mechanical properties of pp : notched impact strength , tensile strength and flexural properties were all increasing , but the extent of increasing were n ' t large 通过xrd分析比较这三种pp mmt纳米复合材料微观结构得到, pp mmt _ ( ome )属于完全插层, pp mmt _ ( om )与pp ommt的插层程度相近,但是pp mmt _ ( om )相对较好;通过对纯pp和三种pp mmt纳米复合材料的结晶性能研究发现,蒙脱土纳米片层对pp结晶产生明显的异相成核作用,结晶能力增强,使pp的结晶温度和结晶速率提高,结晶度增加,球晶晶粒细化,但是没有改变pp的结晶形态,三种pp mmt纳米复合材料的结晶形态都属于晶;通过对pp mmt纳米复合材料的力学性能测试得知,蒙脱土的加入全面提高了pp的力学性能,缺口冲击强度、拉伸强度和弯曲性能都有一定程度的提高,浙江{ _业大学硕十学位论文摘要但是提高幅度都不是很大,不过ommt 、 mmtom和mmtc ) me三种蒙脱土对pp力学性能有着不同的改性作用,其中pp / mmtom最好, pp月边mto崛次之, pp / ommt最低,这种情况主要是由蒙脱土对pp结晶性能的影响和蒙脱土的纳米改性作用造成的。