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Page 1: Plastic and rubber(PA processing aids)

CYD COMPANY     

Please�mail�to�[email protected]�to�get�more�info�and�details.�

Tel:�86-631-5582881�

Add:�No.369-13,Industrial�District,Weihai�City,Shandong�Province,China,264205�

CYD Dendritic Polymers-Plastics and Rubber Additives

Polyamide (PA) Processing Aids

Product Description 

Dendritic� polymers� as� "the� fourth� class� of� new� polymer� materials",� are�

attractive� to� the� scientific� world� and� industrial� circles.� The� novelty� of� these�

materials� includes� highly� branched� molecular� structure,� a� large� number� of�

surface� functional� groups,� void� space� in� molecules,� monodisperse� molecular�

weight�distribution�and�nanoscale�dimensions.�The�structural�characteristics�of�

dendritic�polymers� lead�to�unique�properties�such�as�excellent�solubility�and�

dispersion� properties,� low� melt� viscosity� and� solution� viscosity,� difficult� to�

crystallize�and�easy�to�form�film,�showing�unparalleled�nano�features.�

Dendritic�polymers�are�excellent�modifiers�for�polyamide�(PA)�because�of�the�

unique� structure� and� physicochemical� characteristics.� 1)� Improve� tensile�

strength,� flexural� strength,� impact� strength� and� rheological� properties�

(improve� melt� fluidity,� lower� plasticizing� temperature)� in� PA6� ; 2) Used� as�

compatilizer�for�PA6,�PP�or�other�nylon,�such�as�PA11,�PA1010�,�improve�both�

compatibility�and�mechanical�properties;�3)�Improve�dispersion�of�glass�fibers,�

carbon� fibers� and� various� inorganic� fillers� in� PA6;� 4)� Decrease� spinning�

temperature� of� nylon� to� reduce� thermal� degradation;� 5)� Endow� PA6� with�

excellent� low� temperature� toughness,� thereby� increase� performance� of� low�

temperature�resistance.�

Excellent performance of nylon system with dendritic polymers: 

• Improve�mechanical�properties�of�PA6,�such�as�tensile�strength,�flexural�

strength,�impact�strength,�etc.;�

• Improve�flowability,�processability�of�PA6;�

Page 2: Plastic and rubber(PA processing aids)

CYD COMPANY     

Please�mail�to�[email protected]�to�get�more�info�and�details.�

Tel:�86-631-5582881�

Add:�No.369-13,Industrial�District,Weihai�City,Shandong�Province,China,264205�

• Lower�processing�temperature�,�reduce�thermal�decomposition�of�PA6,�

decrease�energy�consumption,�save�cost;�

• Improve�the�low�temperature�resistance�performance�of�PA6;�

• Improve�compatibility�of�PA6�with�other�nylon�systems�or�other�resins�such�

as�PP;�

• Improve�dispersion�of�inorganic�fillers�such�as�glass�fiber�in�the�PA�system.�

Basic Physical Properties 

No.� Test�Items� Unit� Index�

1� Appearance� ---� Viscous�liquid�or�solid�

2� Volatile� %�(w/w)� ≤ 2%�

3� Density� g/ml� 1.0~1.5�

 

PA6 performance improved by dendritic polymers--1 

Preparation methods: The�premixed�material�of�dendritic�polymers�and�PA6�was�

dried� firstly� and� then� extruded� and� granulated� from� Twin-screw� extruder�

(screw� length-diameter� ratio� � L/D=30,� screw� diameter� ф =35mm),� heating�

temperature��section:�zone�1�100�℃,�zone�2�200�℃,�zone�3�227�℃,�zone�4�230�

℃,�zone�5�215�℃,�screw�speed�80r/min.�The�granulated�material�was�dried�in�

vacuum� drying� oven� at� 80℃� around� 12h,� and� then� injected� into� standard�

samples� from� M20-55� Injection� Machine(Maximum� injection� pressure�

1700kg/cm3)�for�test�of�stretch,�impact�and�bend,�the�mold�temperature�was�

room�temperature.�

In� PA6� systems,� 1.5%� dendritic� polymers� will� increase� the� tensile� strength�

from� 75.4MPa� to� 77.2MPa,� improved� by� 2.4%;� bending� strength� increased�

from� 139.5MPa� to� 146.3MPa,� enhanced� by� 4.9%;� bending� modulus� raised�

Page 3: Plastic and rubber(PA processing aids)

CYD COMPANY     

from� 1901.0MPa� to� 1958.7MPa,� improved� by� 3.0%;� elongation� at� break,�

impact�strength�show�best�performance�when�dosage�was�1%,�enhanced�from�

168.8%,�33.9J/m�to�202.5%,�39.5J/m,�raised�19.96%�and�16.52%.�

As�shown�in�Figure�1,�PA6�with�1.5%�dendritic�polymers,�melt�index�of�blend�

was� increased� from� 18.2g/10min� to� 46.7g/10min,� enhanced� by� 156%,� thus�

improving�processing�performance.�

As� shown� in� Figure� 2,� complex� viscosity� of� blend� was� obviously� decreased�

with� dosage� increasing� of� dendritic� polymers,� maximum� initial� complex�

viscosity� was� reduced� around� 70%,� and� then� a� little� increase,� so� with� 1.5%�

dendritic�polymers,�rheological�properties�of�dendritic�polymers/PA6�reached�

best.�

Melt Index

Figure�1�Effect�of�dendritic�polymers�dosage�on�melt�index�of�nylon�blends�

Please�mail�to�[email protected]�to�get�more�info�and�details.�

Tel:�86-631-5582881�

Add:�No.369-13,Industrial�District,Weihai�City,Shandong�Province,China,264205�

Page 4: Plastic and rubber(PA processing aids)

CYD COMPANY     

Figure�2�Effect�of�dendritic�polymers�dosage�on�rheological�properties�of�PA�blend�

PA6 performance improved by dendritic polymers--2

Preparation methods:  

Blend� of� PA6/dendritic� polymers� (0.1-2.0%� of� PA6� amount)� was� melted� and�

extruded�through�Twin-screw�extruder,�then�dried�in�vacuum�around�12h�and�

injected�into�standard�samples,� injection�pressure�80bar,�back�pressure�5bar,�

maintaining pressure�60bar,�the�mold�temperature�was�30℃.�

As� shown� in� Table� 1,� compared� with� pure� PA6� system� at� different�

temperature,� melt� index� of� system� was� greatly� increased� after� adding�

dendritic�polymers,�when�dosage�was�2.0%,�melt�index�at�235℃,�245℃,�255℃�

and�265℃�was�improved�by�41.3%,�46.1%,�37%,�36.1%.�

As� shown� in� Table� 2,� with� 0.5%� dendritic� polymers� as� additives,� injection�

molding�temperature�was�decreased�10℃�compared�with�pure�PA6�system,�if�

increase� the� dosage� to� 2.0%,� processing� temperature� lowered� 15℃,� thus�

reducing�thermal�degradation�during�processing.�

Dendritic� polymers� as� additives� can� significantly� improve� mechanical�

properties� of� PA6,� with� 2.0%� dosage,� the� yield� strength,� tensile� modulus,�

Please�mail�to�[email protected]�to�get�more�info�and�details.�

Tel:�86-631-5582881�

Add:�No.369-13,Industrial�District,Weihai�City,Shandong�Province,China,264205�

Page 5: Plastic and rubber(PA processing aids)

CYD COMPANY     

Please�mail�to�[email protected]�to�get�more�info�and�details.�

Tel:�86-631-5582881�

Add:�No.369-13,Industrial�District,Weihai�City,Shandong�Province,China,264205�

notched� impact� strength� and� flexural� strength� were� increased� by� 12.8%,�

30.8%,�44.2%,�17.5%.�

Table 1 Melt flow index of PA6/Dendritic polymers blends with different  

dendritic polymers contents.�(Load: 2.16 kg) 

MFI(g/10min) Dendritic polymers 

content(wt%) 235℃  245℃  255℃  265℃ 

Pure PA6  13.8  19.1  25.4  32.1 

0.1  13.6  18.5  24.8  31.6 

0.5  16.2  21.2  27.5  33.2 

1.0  17.1  22.5  29.2  35.0 

2.0  19.5  27.9  34.8  43.7 

� Table 2 Injection molding temperatures of PA6/Dendritic polymers blends�

Barrel temperature(℃) Dendritic polymers 

content(wt%) Ⅰ  Ⅱ  Ⅲ  Ⅳ 

Pure PA6 220 235 230 220

0.1 215 230 225 215

0.5 210 225 220 210

1.0 210 220 215 205

2.0 205 215 210 205

 

Page 6: Plastic and rubber(PA processing aids)

CYD COMPANY     

Please�mail�to�[email protected]�to�get�more�info�and�details.�

Tel:�86-631-5582881�

Add:�No.369-13,Industrial�District,Weihai�City,Shandong�Province,China,264205�

Dendritic polymers improve compatibility performance of PA6/PA1010 

3.0%�content�dendritic�polymers�was�added�to�blend�of�PA6/PA1010,�tensile�

strength was� enhanced� 18.8%� which� from� 66.1MPa� to� 78.5MPa,� bending�

strength� was� increased� by� 15.7%� which� from� 82.2MPa� to� 95.1MPa,� and�

flexural�modulus�was�raised�by�26.4%�which�from�1938MPa�to�2450MPa.�The�

data� shows� that� dendritic� polymers� play� compatibilization� effect� in� blends�

systems,�strengthen�the�interface�binding�between�PA6�and�PA1010,�and�also�

improve�processing�fluidity.�

Applicable Grades:CYD-P Series, CYD-PR121, CYD-PR526, CYD-PU738,

CYD-PD529 etc.