Exploration of post radiation effects on polyamide-1010

Irradiated polyamide-1010 (PA1010) with and without heat treatment after gamma-ray irradiation was compared by wide angle x-ray diffraction (WAXD), differential scanning calorimeter (DSC) and the determination of gel fractions. The results indicate that post radiation effects due to post radiation crosslinking and scissions affect physical properties. Post radiation effects restrain the formation and perfection of the planes (010), and make the crystals imperfect. Post radiation effects change the crystalline structures of polyamide-1010.

The influence of heat treatment on structures of the aggregated state of polyamide-1010

The structural parameters of the aggregated state of polyamide (PA)-1010 annealed at various temperatures were computed by means of the desmearing intensity from Smalt Angle X-ray Scattering (SAXS) measurements and by using the concept of the distance distribution function. The results indicated that the structural parameters of the aggregated state were strongly dependent upon heat treatment conditions and the maximum values of the structural parameters were obtained for the samples annealed at T = 175 degrees C. The particle size Z annealed at different temperature was ranged between 8.1-12.8nm, and the values of the distance distribution function P-max(Z) were obtained when Z = 4.0-6.8 nm. Using one dimension electron density correlation function (1D EDCF) method long period (L) and thickness of the lamellar (d(0)) were estimated and were found to increase with the increase of the degree of crystallinity.

The phase inversion and morphology of nylon 1010 polypropylene blends

Noncompatibilized and compatibilized blends of nylon 1010/PP blends having five different viscosity ratios were prepared by melt extrusion. Glycidyl methacrylate-grafted-polypropylene (PP-g-GMA) was used as the compatibilizer to enbance the adhesion between the two polymers and to stabilize the blend morphology. The effect of the viscosity ratio on the morphology of nylon 1010/polypropylene blends was investigated, with primary attention to the phase-inversion behavior and the average particle size of the dispersed phase. The relationship between the mechanical properties and the phase-inversion composition was investigated as well. Investigation of the morphology of the blends by microscopy indicated that the smaller the viscosity ratio (eta(PP)/eta(PA)) the smaller was the polypropylene concentration at which the phase inversion took place and polypropylene became the continuous phase. The compatibilizer induced a sharp reduction of particle size, but did not have a major effect on the phase-inversion point. An improvement :in the mechanical properties was found when nylon 1010 provided the matrix phase. (C) 1996 John Wiley & Sons, Inc.

Properties of ethylene-propylene copolymer/PA-1010 blends using ethylene-propylene copolymer-graft-acrylic acid as a compatibilizing agent

The modification of ethylene-propylene copolymer (EP) has been accomplished by radical EP-graft-acrylic acid (EP-g-AA) has been used to obtain ternary PA/EP/EP-g-AA blends by melt mixing. Different blend morphologies were observed by scanning electron microscopy; the domain size of the EP-dispersed phase in the polyamide 1010 matrix of compatibilized blends decreased compared with that of uncompatibilized blends. It is found that EP-g-AA used as the third component has a profound effect on the mechanical properties of the resulting blends. This behavior has been attributed to serious chemical interactions taking place between the two components. Thermal analysis shows that some thermal properties of PA in compatibilized PA/EP/EP-g-AA changed because of chemical reactions taken place during the blending process. Wide angle x-ray diffraction measurements also confirmed this result. (C) 1996 John Wiley & Sons, Inc.

On the melting of the nascent state nylon 1010 with different molecular weights

The melting of the nascent state nylon 1010 samples melt condensation polymerized with different M(eta) have been studied by DSC. The relations of melting point, content of higher order crystal with M(eta) are similar, the plots like a peak, at M(eta)=1.48x10(4) have the maximum. The melting heat, melting entropy and crystallinity are decreased gradually with M(eta) increasing.

Influence of the fold surface of the lamellae on radiation effects - Research on irradiated polyamide-1010 containing heterogeneous nuclei

Irradiated polyamide-1010 (PA1010) and PA1010 containing 0.5% (wt) heterogeneous nuclei were studied by ESR, WAXD, DSC and the determination of gel fractions. The fold surface of the lamellae plays an important role in the effects of radiation on crystalline PA1010. The results show that the direct radiation effects on both samples vary, while after being heated to 220 degrees C, the final radiation effects are identical, regardless of the difference in the amount of the fold surface of the lamellae. The post-radiation effects result predominantly from the fold surface.

WAXD and SAXS study on gamma-radiation damage to polyamide-1010 crystal structure

In the present work we attempt to settle the controversy on the district wherein the radiation induced reaction preferentially occurs through examining the structural changes of the irradiated polyamide-1010 specimens on both the crystallographic and the supermolecular level by using WAXD and SAXS techniques. Experimental results indicated that the chain crosslinking and scission of the irradiated specimens occur mainly in the amorphous region and on the crystal surface (or interphase), and extend into the inner portion of the crystal with increasing radiation dose.

Crystal structure of the blend of polyamide 1010 with a bismaleimide by WAXD and SAXS

The blend polyamide 1010/N,N'-(diphenylmethane-4,4'-diyl)bismaleimide (PA1010/ BMI) has been investigated by means of WAXD and SAXS. The results obtained with the help of the Ruland, variance and 1D EDCF analysis showed that the degree of crystallinity (W-c,W-x), crystallite size (L(hikl)), long period (L) and thickness of average crystal lamellae (d) decrease with BMI content. Experimental and calculated density values (rho(c)) are in good agreement. Addition of BMT to PA1010 causes an increase in structural distortion. The results from SAXS analysis also supported that a crystalline amorphous interphase exists in the lamellae of semicrystalline polymers, so that a three-phase model instead of the traditional two-phase model should be used.

Small angle X-ray scattering study of structural parameters of the aggregated state in polyamide 1010+BMI

The structural parameters of the aggregated state in the polyamide PA1010 and N,N'-bismaleimide-4,4'-diphenyl methane (BMI) system were computed by means of the desmearing intensity from SAXS and using the concept of the distance distribution function. The results revealed that the parameters Q, I(0), l(c) and L decreased with the increase BMI component, whereas O-s increased. The particle dimension Z for different BMI contents was less than 13.2 nm, and the maximum value of the distance distribution function P(Z) was found to be in the range Z = 6.5-7.0 nm.

γ辐照对异相成核聚酰胺1010的结晶破坏

通过引入异相成核剂（Ｎｄ２Ｏ３）改变结晶－非晶界面，来研究聚集态结构与γ－辐照结晶破坏的关系。利用ＷＡＸＤ，ＤＳＣ和凝胶含量测定的方法研究辐照聚酰胺１０１０的结晶破坏。结果表明：结晶破坏始于结晶表面，结晶的表面积越大，结晶无定形化的剂量越高。结晶表面对结晶起保护作用。

辐照聚酰胺1010的后效应

用ＤＳＣ以及凝胶含量测定的方法研究了辐照聚酰胺１０１０的后效应，讨论了晶区分子运动与转变受辐射后效应的影响，也探讨了结晶表面积对后效应的影响。结果表明辐射后效应主要来源于结晶表面内的俘陷自由基。

不同分子量初生态尼龙1010的熔融

利用ＤＳＣ方法研究了熔体聚合不同分子量初生态尼龙１０１０样品的熔融，发现随分子量增大，熔点有极大值，高规整性晶体的量也呈极大值，且两者峰值相同；结晶度则逐渐减小；熔融热、熔融熵也逐渐减小；其原因主要是高规整度晶体量减少所致。

热处理对尼龙1010结构影响研究

采用ＷＡＸＤ，ＳＡＸＳ方法研究了热处理对尼龙１０１０聚集态结构的影响．结果表明，在温度为１７５℃左右对样品进行退火处理可获得较完善的结晶．利用Ｗｃ．ｘ~Ｔ关系曲线外推法得到尼龙１０１０样品的Ｔｇ大约为５８℃．根据一维电子密度相关函数法求得了系列样品在所研究条件下的结晶片层厚，过渡层厚，长周期和结晶非晶相间的密度差．得到了不同退火条件尼龙１０１０样品的结晶相密度ρｃ．

不同分子量尼龙1010的结晶与熔融

不同分子量尼龙１０１０的结晶与熔融＊朱诚身王经武王友文杨桂萍（郑州大学材料工程系郑州４５００５２）陈玉莫志深（东北师范大学分析测试中心长春１３００２４）（中国科学院长春应用化学研究所长春１３００２２）关键词尼龙１０１０，分子量，结晶，熔融＊１９９４＿...

离子聚合物在Nylon－1010／PP共混物中的增容作用

离子聚合物在Ｎｙｌｏｎ－１０１０／ＰＰ共混物中的增容作用曲桂杰，刘景江（中国科学院长春应用化学研究所长春１３００２２）关键词聚丙烯，Ｎｙｌｏｎ－１０１０，离子聚合物，增容选择离子聚合物作为高聚物共混的增容剂，通过离子间的相互作用可达到增容效果［１］。...