CAS 9003-17-2 Polybutadiene, cis - Materials / Alfa Chemistry

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Polybutadiene, cis

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Catalog Number

ACM9003172-12

CAS Number

9003-17-2

Product Name

Polybutadiene, cis

Structure

Category

Hydrophobic Polymers

Description

Polybutadiene, cis (PB-cis) is a synthetic rubber that is prepared by solution polymerization of 1,4-butadiene. Its mechanical properties include low temperature flexibility and abrasion resistance. It can be cured by using sulfur based donors and peroxides and thus PB-cis acts as a highly cross-linked polymer with high resilience.

IUPAC Name

buta-1,3-diene

Molecular Weight

average Mw 200,000-300,000

Molecular Formula

(CH2CH=CHCH2)n

Canonical SMILES

C=CC=C

InChI

1S/C4H8/c1-3-4-2/h3-4H,1-2H3/b4-3+

InChI Key

IAQRGUVFOMOMEM-ONEGZZNKSA-N

Boiling Point

24.1 °F at 760 mm Hg (NTP, 1992);-4.4 °C;-4.5 °C;-4 °C;24°F;24°F

Melting Point

-164 °F (NTP, 1992);-108.9 °C;-108.966 °C;-108.9°C;-109 °C;-164°F;-164°F

Flash Point

-105 °F (NTP, 1992);Gas;-76 °C c.c.;-105°F;NA (Gas) -105°F (Liquid)

Density

0.9 g/mL at 25 °C (lit.)

Solubility

Insoluble (NTP, 1992);0.01 M;In water, 735 mg/L at 20 °C;Slightly soluble in methanol, ethanol; soluble in organic solvents such as carbon tetrachloride; alcohol dissolves about 40 vols at room temp.;Soluble in ethanol, ether, benzene; very soluble in acetone;0.735 mg/mL at 25 °C;Solubility in water, g/100ml: 0.1 (none);Insoluble

Application

PB-cis can be polymerized with styrene for the formation of high impact polystyrene (HIPS). It may also be used as a toughening agent for acrylonitrile butadiene rubber (ABS) based resins.

Color/Form

Colorless gas ... [Note: A liquid below 24 degrees F. Shipped as a liquefied compressed gas]

Complexity

Corrosivity

Non-corrosive

Covalently-Bonded Unit Count

EC Number

203-450-8;271-039-0;618-356-6

Exact Mass

54.04695g/mol

Features And Benefits

This product has good hydrophobicity to meet your specific application needs

Form

slab/chunk

Formal Charge

Heat of Vaporization

20.86 kJ/mol 25 °C; 22.47 kJ/mol at -4.41 °C

Heavy Atom Count

ICSC Number

0017

Log P

1.99 (LogP);log Kow = 1.99;1.99;1.99

MDL Number

MFCD00084398

MeSH Entry Terms

1,3-butadiene;butadiene;divinyl

Monoisotopic Mass

54.04695g/mol

Odor

MIldly aromatic odor;Mild aromatic or gasoline-like odor

Other Experimental

Dimerizes to 4-vinylcyclohexane;Adiabatic calorimetry performed on butadiene-derived popcorn polymer samples from industrial facilities has revealed exothermic behavior accompanied by non-condensible gas production, indicative of possible decomposition, at elevated temperatures. In the presence of low concentrations of 1,3-butadiene, reactivity is observed at temperatures of 60-70 degrees C; that is, 20-30 degrees C below those usually seen for butadiene alone. Once the butadiene is consumed, the reaction behavior reverts to that of the popcorn polymer alone. At higher butadiene concentrations, the low temperature reaction persists, eventually merging with typical butadiene behavior. The butadiene reactivity with popcorn polymer is attributed to polymerization reaction at free radical sites in the popcorn polymer. Different popcorn polymer samples exhibit distinct extents of reactivity, presumably depending on the nature and concentration of the free radical sites and the structure of the material. Uninhibited butadiene exposed to 100 psia air, which may act to generate peroxide species, shows a small, additional exotherm around 50-80 degrees C. Contact of butadiene with lauroyl peroxide, providing free radicals upon decomposition, generates an exotherm at temperatures as low as 60 degrees C.;LIQUID SURFACE TENSION: 13.4 DYNES/CM AT 20 °C; LIQUID-WATER INTERFACIAL TENSION: (EST) 67 DYNES/CM AT 22 °C; VAPOR (GAS) SPECIFIC GRAVITY: 1.9 AT 20 °C; RATIO OF SPECIFIC HEATS OF VAPOR (GAS): 1.1; LATENT HEAT OF VAPORIZATION: 100 CAL/G; HEAT OF COMBUSTION: -10560 CAL/G; HEAT OF POLYMERIZATION: -305 CAL/G;1 mg/cu m = 0.45 ppm; 1 ppm = 2.25 mg/cu m;Specific volume at 21.1 °C, 101.325 kPa: 430.6 cu d/kg; 6.9 cu ft/lb;Absolute density, gas at 101.325 kPa at 0 °C: 2.428 kg/cu m; Relative density, gas at 101.325 kPa at 0 °C (air = 1): 1.878; Density, liquid at saturation pressure at 20 °C: 0.621 kg/l; Critical density: 0.245 kg/cu m;Critical compressibility factor: 0.270;Molar specific heat, gas at 101.325 kPa at 25 deg, at constant pressure: 82.132 J/mol K; 0.363 kcal/kg K; at constant volume: 73.803 J/mol K; 0.326 kcal/kg K;Enthalpy of fusion: 7.98 kJ/mol;LIQUEFIED COMPRESSED GAS;Colorless liquid at -4.7 °C;Henry's Law constant = 7.36X10-2 atm-cu m/mole at 25 °C /Calculated from the atmospheric vapor pressure (760 mm Hg since it is a gas) and water solubility/;Hydroxyl radical reaction rate constant = 6.93X10-11 cu cm/molecule-sec at 25 °C;Ozone reaction rate constant = 6.24X10-18 cu cm/molecule-sec at 25 °C;Nitrate radical reaction rate constant = 1.00X10-13 cu cm/molecule-sec at 25 °C

Packaging

100 g in poly bottle

Refractive Index

Index of refraction: 1.4292 at 25 °C

Rotatable Bond Count

RTECS Number

EI9275000

Stability

Stable under recommended storage conditions. Test for peroxide formation before using or discard after 3 months.;... Polymerizes readily, particularly if oxygen is present ... the commercial material contains an inhibitor to prevent spontaneous polymerization during shipment or storage.

Storage Temperature

2-8°C

UNII

JSD5FGP5VD

UN Number

1010;1010;1010;1010

Vapor Density

1.87 (NTP, 1992) (Relative to Air);1.87 (Air = 1);Relative vapor density (air = 1): 1.9;1.88

Vapor Pressure

1840 mm Hg at 70 °F ; 760 mm Hg at 23.9° F (NTP, 1992);2.11e+03 mmHg;273.6 kPa (2,052 mm Hg) at 25 °C;Vapor pressure, kPa at 20 °C: 245;2.4 atm;2.4 atm

Viscosity

Gas at 101.325 kPa at 20 °C: 0.00754 cP; Liquid at -40 °C: 0.33 cP

XLogP3

MSDS

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COA

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Spec Sheet

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